ras_cas_gen.sch

EESchema Schematic File Version 4
EELAYER 30 0
EELAYER END
$Descr A3 16535 11693
encoding utf-8
Sheet 3 3
Title "Hannes256: C16/+4 256 kB RAM Expansion"
Date "2023-01-09"
Rev "2git"
Comp "SukkoPera"
Comment1 "Hannes Version (Update 1 with \"TED Feature\")"
Comment2 "Based on drawings by Solder/Synergy"
Comment3 "Licensed under CC BY-NC-SA 4.0"
Comment4 ""
$EndDescr
Text Notes 7600 2955 0    50   ~ 0
$FD16 WRITE
Wire Wire Line
	7105 3560 7585 3560
Text Notes 15795 9665 2    50   ~ 0
Update 1 adds a "TED Feature": the purpose of the change is to restrict\nTED access to RAM bank 3 when the 6th bit of the RAM register is cleared.\nIf bit 6 is HIGH, the current ram bank is retained during TED access. So:\n- U5 Bit6=0: CPU accesses current RAM, TED always accesses RAM bank 3\n- U5 Bit6=1: CPU accesses current RAM, TED accesses current RAM
Entry Wire Line
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Entry Wire Line
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Entry Wire Line
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Entry Wire Line
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Entry Wire Line
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Entry Wire Line
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Entry Wire Line
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Entry Wire Line
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Entry Wire Line
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Entry Wire Line
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Entry Wire Line
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Entry Wire Line
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Entry Wire Line
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Entry Wire Line
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Entry Wire Line
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Entry Wire Line
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a15
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a8
Text Label 10585 2850 0    60   ~ 0
a1
Text Label 10585 3000 0    60   ~ 0
a9
Text Label 10585 3100 0    60   ~ 0
a2
Text Label 10585 3250 0    60   ~ 0
a10
Text Label 10585 3350 0    60   ~ 0
a3
Text Label 10585 4200 0    60   ~ 0
a11
Text Label 10585 4450 0    60   ~ 0
a12
Text Label 10585 4700 0    60   ~ 0
a13
Text Label 10585 4800 0    60   ~ 0
a6
Text Label 10585 4950 0    60   ~ 0
a14
Text Label 10585 5050 0    60   ~ 0
a7
Entry Wire Line
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Entry Wire Line
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Entry Wire Line
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Entry Wire Line
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Entry Wire Line
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Entry Wire Line
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Entry Wire Line
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Entry Wire Line
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Text Label 12485 2550 0    60   ~ 0
m0
Text Label 12485 2800 0    60   ~ 0
m1
Text Label 12485 3050 0    60   ~ 0
m2
Text Label 12485 3300 0    60   ~ 0
m3
Text Label 12485 4250 0    60   ~ 0
m4
Text Label 12485 4500 0    60   ~ 0
m5
Text Label 12485 4750 0    60   ~ 0
m6
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m7
Wire Wire Line
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Wire Wire Line
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Wire Wire Line
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Wire Wire Line
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Wire Wire Line
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Wire Wire Line
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Wire Wire Line
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Wire Wire Line
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Wire Wire Line
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Wire Wire Line
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Wire Wire Line
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Wire Wire Line
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Wire Wire Line
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Wire Wire Line
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Wire Wire Line
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Wire Wire Line
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Wire Wire Line
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Wire Wire Line
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Wire Wire Line
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Wire Wire Line
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Wire Wire Line
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Wire Wire Line
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Wire Wire Line
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Wire Wire Line
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Wire Wire Line
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Wire Wire Line
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Wire Wire Line
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Wire Wire Line
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Wire Wire Line
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Wire Wire Line
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Text Label 10285 2250 3    60   ~ 0
C16AddressBus
Text Label 10585 3500 0    60   ~ 0
sel
Text Label 10585 5200 0    60   ~ 0
sel
Wire Wire Line
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Connection ~ 10185 3500
Wire Wire Line
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Text GLabel 9970 3500 0    50   Input ~ 0
MUX
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Text GLabel 9970 2250 0    50   Input ~ 0
a[0..15]
$Comp
L power:GND #PWR?
U 1 1 63A64613
P 10735 3700
AR Path="/63A64613" Ref="#PWR?"  Part="1" 
AR Path="/62E48B71/63A64613" Ref="#PWR?"  Part="1" 
AR Path="/63A22C28/63A64613" Ref="#PWR012"  Part="1" 
F 0 "#PWR012" H 10735 3450 50  0001 C CNN
F 1 "GND" H 10740 3527 50  0000 C CNN
F 2 "" H 10735 3700 50  0001 C CNN
F 3 "" H 10735 3700 50  0001 C CNN
	1    10735 3700
	1    0    0    -1  
$EndComp
$Comp
L power:GND #PWR?
U 1 1 63A64619
P 10735 5400
AR Path="/63A64619" Ref="#PWR?"  Part="1" 
AR Path="/62E48B71/63A64619" Ref="#PWR?"  Part="1" 
AR Path="/63A22C28/63A64619" Ref="#PWR014"  Part="1" 
F 0 "#PWR014" H 10735 5150 50  0001 C CNN
F 1 "GND" H 10740 5227 50  0000 C CNN
F 2 "" H 10735 5400 50  0001 C CNN
F 3 "" H 10735 5400 50  0001 C CNN
	1    10735 5400
	1    0    0    -1  
$EndComp
Text Label 10585 4550 0    60   ~ 0
a5
Text Label 10585 4300 0    60   ~ 0
a4
Wire Bus Line
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Text Label 13035 2450 0    60   ~ 0
MultiplexedAddressBus
Wire Wire Line
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Wire Wire Line
	4415 3060 4415 2960
$Comp
L Device:C C?
U 1 1 63A64678
P 4415 3210
AR Path="/63A64678" Ref="C?"  Part="1" 
AR Path="/62E48B71/63A64678" Ref="C?"  Part="1" 
AR Path="/63A22C28/63A64678" Ref="C2"  Part="1" 
F 0 "C2" H 4530 3256 50  0000 L CNN
F 1 "100n" H 4530 3165 50  0000 L CNN
F 2 "Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder" H 4453 3060 50  0001 C CNN
F 3 "~" H 4415 3210 50  0001 C CNN
F 4 "C49678" H 4415 3210 50  0001 C CNN "LCSC"
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	1    0    0    -1  
$EndComp
$Comp
L power:GND #PWR?
U 1 1 63A6468A
P 4415 3460
AR Path="/63A6468A" Ref="#PWR?"  Part="1" 
AR Path="/62E48B71/63A6468A" Ref="#PWR?"  Part="1" 
AR Path="/63A22C28/63A6468A" Ref="#PWR019"  Part="1" 
F 0 "#PWR019" H 4415 3210 50  0001 C CNN
F 1 "GND" H 4420 3287 50  0000 C CNN
F 2 "" H 4415 3460 50  0001 C CNN
F 3 "" H 4415 3460 50  0001 C CNN
	1    4415 3460
	1    0    0    -1  
$EndComp
$Comp
L 74ls257:74LS257 U?
U 1 1 63A64692
P 11735 4750
AR Path="/63A64692" Ref="U?"  Part="1" 
AR Path="/62E48B71/63A64692" Ref="U?"  Part="1" 
AR Path="/63A22C28/63A64692" Ref="U6"  Part="1" 
F 0 "U6" H 11785 4900 50  0000 C CNN
F 1 "74HCT257" H 11785 4600 50  0000 C CNN
F 2 "Package_SO:SOIC-16_3.9x9.9mm_P1.27mm" H 11735 4750 50  0001 C CNN
F 3 "" H 11735 4750 50  0001 C CNN
F 4 "C707097" H 11735 4750 50  0001 C CNN "LCSC"
F 5 "HCT recommended, '157 works just as well" H 11735 4750 50  0001 C CNN "Notes"
	1    11735 4750
	1    0    0    -1  
$EndComp
$Comp
L 74ls257:74LS257 U?
U 1 1 63A64698
P 11735 3050
AR Path="/63A64698" Ref="U?"  Part="1" 
AR Path="/62E48B71/63A64698" Ref="U?"  Part="1" 
AR Path="/63A22C28/63A64698" Ref="U5"  Part="1" 
F 0 "U5" H 11785 3200 50  0000 C CNN
F 1 "74HCT257" H 11785 2900 50  0000 C CNN
F 2 "Package_SO:SOIC-16_3.9x9.9mm_P1.27mm" H 11735 3050 50  0001 C CNN
F 3 "" H 11735 3050 50  0001 C CNN
F 4 "C707097" H 11735 3050 50  0001 C CNN "LCSC"
F 5 "HCT recommended, '157 works just as well" H 11735 3050 50  0001 C CNN "Notes"
	1    11735 3050
	1    0    0    -1  
$EndComp
Text GLabel 7585 3560 2    50   Input ~ 0
AEC
Text GLabel 14120 2450 2    50   Output ~ 0
m[0..8]
$Comp
L Device:C C?
U 1 1 63A6467E
P 13485 4655
AR Path="/63A6467E" Ref="C?"  Part="1" 
AR Path="/62E48B71/63A6467E" Ref="C?"  Part="1" 
AR Path="/63A22C28/63A6467E" Ref="C6"  Part="1" 
F 0 "C6" H 13600 4701 50  0000 L CNN
F 1 "100n" H 13600 4610 50  0000 L CNN
F 2 "Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder" H 13523 4505 50  0001 C CNN
F 3 "~" H 13485 4655 50  0001 C CNN
F 4 "C49678" H 13485 4655 50  0001 C CNN "LCSC"
	1    13485 4655
	1    0    0    -1  
$EndComp
$Comp
L power:GND #PWR?
U 1 1 63A64672
P 13485 4905
AR Path="/63A64672" Ref="#PWR?"  Part="1" 
AR Path="/62E48B71/63A64672" Ref="#PWR?"  Part="1" 
AR Path="/63A22C28/63A64672" Ref="#PWR020"  Part="1" 
F 0 "#PWR020" H 13485 4655 50  0001 C CNN
F 1 "GND" H 13485 4755 50  0000 C CNN
F 2 "" H 13485 4905 50  0001 C CNN
F 3 "" H 13485 4905 50  0001 C CNN
	1    13485 4905
	1    0    0    -1  
$EndComp
Wire Wire Line
	13485 4505 13485 4405
Wire Wire Line
	13485 4805 13485 4905
Wire Wire Line
	13485 2785 13485 2870
$Comp
L power:+5V #PWR?
U 1 1 63A64661
P 13485 2785
AR Path="/63A64661" Ref="#PWR?"  Part="1" 
AR Path="/62E48B71/63A64661" Ref="#PWR?"  Part="1" 
AR Path="/63A22C28/63A64661" Ref="#PWR025"  Part="1" 
F 0 "#PWR025" H 13485 2635 50  0001 C CNN
F 1 "+5V" H 13500 2958 50  0000 C CNN
F 2 "" H 13485 2785 50  0001 C CNN
F 3 "" H 13485 2785 50  0001 C CNN
	1    13485 2785
	1    0    0    -1  
$EndComp
Wire Wire Line
	13485 3235 13485 3170
$Comp
L power:GND #PWR?
U 1 1 63A6465A
P 13485 3235
AR Path="/63A6465A" Ref="#PWR?"  Part="1" 
AR Path="/62E48B71/63A6465A" Ref="#PWR?"  Part="1" 
AR Path="/63A22C28/63A6465A" Ref="#PWR026"  Part="1" 
F 0 "#PWR026" H 13485 2985 50  0001 C CNN
F 1 "GND" H 13490 3062 50  0000 C CNN
F 2 "" H 13485 3235 50  0001 C CNN
F 3 "" H 13485 3235 50  0001 C CNN
	1    13485 3235
	1    0    0    -1  
$EndComp
$Comp
L Device:C C?
U 1 1 63A64654
P 13485 3020
AR Path="/63A64654" Ref="C?"  Part="1" 
AR Path="/62E48B71/63A64654" Ref="C?"  Part="1" 
AR Path="/63A22C28/63A64654" Ref="C5"  Part="1" 
F 0 "C5" H 13600 3066 50  0000 L CNN
F 1 "100n" H 13600 2975 50  0000 L CNN
F 2 "Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder" H 13523 2870 50  0001 C CNN
F 3 "~" H 13485 3020 50  0001 C CNN
F 4 "C49678" H 13485 3020 50  0001 C CNN "LCSC"
	1    13485 3020
	1    0    0    -1  
$EndComp
$Comp
L Device:C C?
U 1 1 63ECD15A
P 4590 5785
AR Path="/63ECD15A" Ref="C?"  Part="1" 
AR Path="/62E48B71/63ECD15A" Ref="C?"  Part="1" 
AR Path="/63A22C28/63ECD15A" Ref="C3"  Part="1" 
F 0 "C3" H 4475 5831 50  0000 R CNN
F 1 "100n" H 4475 5740 50  0000 R CNN
F 2 "Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder" H 4628 5635 50  0001 C CNN
F 3 "~" H 4590 5785 50  0001 C CNN
F 4 "C49678" H 4590 5785 50  0001 C CNN "LCSC"
	1    4590 5785
	1    0    0    -1  
$EndComp
$Comp
L power:GND #PWR?
U 1 1 63ECD16A
P 4590 6120
AR Path="/63ECD16A" Ref="#PWR?"  Part="1" 
AR Path="/62E48B71/63ECD16A" Ref="#PWR?"  Part="1" 
AR Path="/63A22C28/63ECD16A" Ref="#PWR037"  Part="1" 
F 0 "#PWR037" H 4590 5870 50  0001 C CNN
F 1 "GND" H 4595 5947 50  0000 C CNN
F 2 "" H 4590 6120 50  0001 C CNN
F 3 "" H 4590 6120 50  0001 C CNN
	1    4590 6120
	1    0    0    -1  
$EndComp
$Comp
L power:+5V #PWR?
U 1 1 63ECD177
P 4590 5430
AR Path="/63ECD177" Ref="#PWR?"  Part="1" 
AR Path="/62E48B71/63ECD177" Ref="#PWR?"  Part="1" 
AR Path="/63A22C28/63ECD177" Ref="#PWR035"  Part="1" 
F 0 "#PWR035" H 4590 5280 50  0001 C CNN
F 1 "+5V" H 4605 5603 50  0000 C CNN
F 2 "" H 4590 5430 50  0001 C CNN
F 3 "" H 4590 5430 50  0001 C CNN
	1    4590 5430
	1    0    0    -1  
$EndComp
Text Notes 5020 8135 0    50   ~ 0
THE 6529B IS HARD TO FIND THESE DAYS, SO A REPLACEMENT\nSHOULD BE FOUND. MANY CHIPS SEEM SUITABLE BUT THEY ALL\nLACK THE ABILITY TO PRESET THEIR OUTPUTS TO HIGH, WHICH\nIS ESSENTIAL FOR HOW THIS EXPANSION WORKS, SO WE MUST\nRESORT TO SOME TRICK...\n\nTHERE IS NO NEED FOR OPEN-COLLECTOR OUTPUTS.
Wire Wire Line
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Text GLabel 5495 3660 0    50   Input ~ 0
MUX
$Comp
L power:+5V #PWR?
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AR Path="/640F5993" Ref="#PWR?"  Part="1" 
AR Path="/62E48B71/640F5993" Ref="#PWR?"  Part="1" 
AR Path="/63A22C28/640F5993" Ref="#PWR0102"  Part="1" 
F 0 "#PWR0102" H 7255 2480 50  0001 C CNN
F 1 "+5V" H 7270 2803 50  0000 C CNN
F 2 "" H 7255 2630 50  0001 C CNN
F 3 "" H 7255 2630 50  0001 C CNN
	1    7255 2630
	1    0    0    -1  
$EndComp
Wire Wire Line
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Wire Wire Line
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Wire Wire Line
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Wire Wire Line
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Wire Wire Line
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Entry Wire Line
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Entry Wire Line
	5090 3360 5190 3460
Entry Wire Line
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Entry Wire Line
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Text Label 5190 3460 0    50   ~ 0
a14
Wire Wire Line
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Text Label 5190 3360 0    50   ~ 0
a13
Wire Wire Line
	5605 3360 5190 3360
Text Label 5190 3260 0    50   ~ 0
a12
Wire Wire Line
	5605 3260 5190 3260
Text Label 5190 3560 0    50   ~ 0
a15
Wire Wire Line
	5605 3560 5190 3560
Entry Wire Line
	5090 2960 5190 3060
$Comp
L GAL20V8:GAL20V8 U2
U 1 1 63F7FBC6
P 6355 3310
F 0 "U2" H 6355 4225 50  0000 C CNN
F 1 "GAL20V8" H 6355 4134 50  0000 C CNN
F 2 "Package_DIP:DIP-24_W7.62mm_Socket" H 6355 3310 50  0001 C CNN
F 3 "DOCUMENTATION" H 6355 3310 50  0001 C CNN
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	1    0    0    -1  
$EndComp
Text GLabel 7210 3060 2    50   Output ~ 0
~CS_OUT
Text GLabel 5550 3160 0    50   Input ~ 0
~CS_IN
Wire Bus Line
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Entry Wire Line
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Entry Wire Line
	5090 2760 5190 2860
Entry Wire Line
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Text GLabel 4535 2250 0    50   Input ~ 0
a[0..15]
$Comp
L power:GND #PWR?
U 1 1 63A644D4
P 5475 3975
AR Path="/63A644D4" Ref="#PWR?"  Part="1" 
AR Path="/62E48B71/63A644D4" Ref="#PWR?"  Part="1" 
AR Path="/63A22C28/63A644D4" Ref="#PWR015"  Part="1" 
F 0 "#PWR015" H 5475 3725 50  0001 C CNN
F 1 "GND" H 5480 3802 50  0000 C CNN
F 2 "" H 5475 3975 50  0001 C CNN
F 3 "" H 5475 3975 50  0001 C CNN
	1    5475 3975
	1    0    0    -1  
$EndComp
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a2
Wire Wire Line
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Text Label 5190 2860 0    50   ~ 0
a1
Wire Wire Line
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Text Label 5190 2760 0    50   ~ 0
a0
Wire Wire Line
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Text Label 5190 3060 0    50   ~ 0
a3
Wire Wire Line
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Text Label 12485 5855 0    60   ~ 0
m8
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Wire Wire Line
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Wire Wire Line
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Wire Wire Line
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Wire Wire Line
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Wire Wire Line
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Wire Wire Line
	7105 3760 7490 3760
Wire Wire Line
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Wire Wire Line
	7105 2960 7490 2960
Text Notes 5730 4270 0    50   ~ 0
ALL THE GLUE LOGIC WAS REPLACED\nWITH A SINGLE OLD-SKOOLZ GAL!
$Comp
L power:+5V #PWR?
U 1 1 633D8DCD
P 4415 2960
AR Path="/633D8DCD" Ref="#PWR?"  Part="1" 
AR Path="/62E48B71/633D8DCD" Ref="#PWR?"  Part="1" 
AR Path="/63A22C28/633D8DCD" Ref="#PWR0106"  Part="1" 
F 0 "#PWR0106" H 4415 2810 50  0001 C CNN
F 1 "+5V" H 4430 3133 50  0000 C CNN
F 2 "" H 4415 2960 50  0001 C CNN
F 3 "" H 4415 2960 50  0001 C CNN
	1    4415 2960
	1    0    0    -1  
$EndComp
$Comp
L power:+5V #PWR?
U 1 1 633D9554
P 13485 4405
AR Path="/633D9554" Ref="#PWR?"  Part="1" 
AR Path="/62E48B71/633D9554" Ref="#PWR?"  Part="1" 
AR Path="/63A22C28/633D9554" Ref="#PWR0107"  Part="1" 
F 0 "#PWR0107" H 13485 4255 50  0001 C CNN
F 1 "+5V" H 13500 4578 50  0000 C CNN
F 2 "" H 13485 4405 50  0001 C CNN
F 3 "" H 13485 4405 50  0001 C CNN
	1    13485 4405
	1    0    0    -1  
$EndComp
$Comp
L power:+5V #PWR?
U 1 1 633E34D2
P 13485 3790
AR Path="/633E34D2" Ref="#PWR?"  Part="1" 
AR Path="/62E48B71/633E34D2" Ref="#PWR?"  Part="1" 
AR Path="/63A22C28/633E34D2" Ref="#PWR0108"  Part="1" 
F 0 "#PWR0108" H 13485 3640 50  0001 C CNN
F 1 "+5V" H 13500 3963 50  0000 C CNN
F 2 "" H 13485 3790 50  0001 C CNN
F 3 "" H 13485 3790 50  0001 C CNN
	1    13485 3790
	1    0    0    -1  
$EndComp
$Comp
L power:VCC #PWR0109
U 1 1 633E54A0
P 13855 3790
F 0 "#PWR0109" H 13855 3640 50  0001 C CNN
F 1 "VCC" H 13870 3963 50  0000 C CNN
F 2 "" H 13855 3790 50  0001 C CNN
F 3 "" H 13855 3790 50  0001 C CNN
	1    13855 3790
	1    0    0    -1  
$EndComp
Wire Wire Line
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Wire Wire Line
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Wire Wire Line
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Text Notes 11270 3905 0    50   ~ 0
'157s WILL BE FINE, TOO
Wire Wire Line
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Wire Wire Line
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Wire Wire Line
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Text GLabel 7585 2760 2    50   Input ~ 0
R_~W
Text Notes 7850 2815 0    50   ~ 0
R/~W~ WAS NOT USED IN THE ORIGINAL\nHANNES/SOLDER CIRCUIT BUT WE NEED IT\nIN ORDER TO KNOW WHETHER TO ENABLE\nTHE 74x74 OR THE 74x245.
Text Label 12340 7695 2    50   ~ 0
d7
Entry Wire Line
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Wire Bus Line
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Text GLabel 12970 7795 2    50   Output ~ 0
d[0..7]
Wire Wire Line
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Wire Wire Line
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Wire Wire Line
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Wire Wire Line
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Wire Wire Line
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Wire Wire Line
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Wire Wire Line
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Wire Wire Line
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Text Label 12340 6995 2    50   ~ 0
d0
Text Label 12340 7095 2    50   ~ 0
d1
Text Label 12340 7195 2    50   ~ 0
d2
Text Label 12340 7295 2    50   ~ 0
d3
Text Label 12340 7395 2    50   ~ 0
d4
Text Label 12340 7495 2    50   ~ 0
d5
Text Label 12340 7595 2    50   ~ 0
d6
Entry Wire Line
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Entry Wire Line
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Entry Wire Line
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Entry Wire Line
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Entry Wire Line
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Entry Wire Line
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Entry Wire Line
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Text Label 10560 6995 0    50   ~ 0
p0
Text Label 10560 7095 0    50   ~ 0
p1
Text Label 10560 7595 0    50   ~ 0
p6
Text Label 10560 7695 0    50   ~ 0
p7
Wire Wire Line
	11575 6610 11575 6650
$Comp
L power:+5V #PWR?
U 1 1 637951AE
P 11575 6610
AR Path="/637951AE" Ref="#PWR?"  Part="1" 
AR Path="/62E48B71/637951AE" Ref="#PWR?"  Part="1" 
AR Path="/63A22C28/637951AE" Ref="#PWR0112"  Part="1" 
F 0 "#PWR0112" H 11575 6460 50  0001 C CNN
F 1 "+5V" H 11590 6783 50  0000 C CNN
F 2 "" H 11575 6610 50  0001 C CNN
F 3 "" H 11575 6610 50  0001 C CNN
	1    11575 6610
	1    0    0    -1  
$EndComp
$Comp
L power:GND #PWR?
U 1 1 63795E43
P 11575 8380
AR Path="/63795E43" Ref="#PWR?"  Part="1" 
AR Path="/62E48B71/63795E43" Ref="#PWR?"  Part="1" 
AR Path="/63A22C28/63795E43" Ref="#PWR0114"  Part="1" 
F 0 "#PWR0114" H 11575 8130 50  0001 C CNN
F 1 "GND" H 11580 8207 50  0000 C CNN
F 2 "" H 11575 8380 50  0001 C CNN
F 3 "" H 11575 8380 50  0001 C CNN
	1    11575 8380
	1    0    0    -1  
$EndComp
Wire Wire Line
	7105 3260 7490 3260
Text Label 7490 3260 2    50   ~ 0
~cs_ramrd
Text Label 10560 7995 0    50   ~ 0
~cs_ramrd
Text Notes 10595 9015 0    50   ~ 0
WE ALSO NEED SOMETHING ELSE TO ALLOW OUR\nRAM CONTROL REGISTER TO BE READ BACK. SINCE\nWE ARE WORKING WITH REVERSE LOGIC, WE USE\nAN INVERTING BUFFER AND... TA-DA!
Text Notes 6085 2300 0    50   ~ 0
GAL22V10 CAN BE\nUSED AS WELL
Text Notes 7600 3260 0    50   ~ 0
$FD16 READ
Wire Wire Line
	11075 7595 10560 7595
Wire Wire Line
	11075 7695 10560 7695
Wire Wire Line
	11075 6995 10560 6995
Wire Wire Line
	11075 7095 10560 7095
Text Label 10560 7195 0    50   ~ 0
p2
Text Label 10560 7295 0    50   ~ 0
p3
Wire Wire Line
	11075 7195 10560 7195
Wire Wire Line
	11075 7295 10560 7295
Text Label 10560 7395 0    50   ~ 0
p4
Text Label 10560 7495 0    50   ~ 0
p5
Wire Wire Line
	11075 7395 10560 7395
Wire Wire Line
	11075 7495 10560 7495
Wire Wire Line
	6055 5465 6055 5375
$Comp
L power:+5V #PWR?
U 1 1 6399FCCB
P 6055 5375
AR Path="/6399FCCB" Ref="#PWR?"  Part="1" 
AR Path="/62E48B71/6399FCCB" Ref="#PWR?"  Part="1" 
AR Path="/63A22C28/6399FCCB" Ref="#PWR0113"  Part="1" 
F 0 "#PWR0113" H 6055 5225 50  0001 C CNN
F 1 "+5V" H 6070 5548 50  0000 C CNN
F 2 "" H 6055 5375 50  0001 C CNN
F 3 "" H 6055 5375 50  0001 C CNN
	1    6055 5375
	1    0    0    -1  
$EndComp
Wire Wire Line
	6055 7160 6055 7065
$Comp
L power:GND #PWR?
U 1 1 639A0F2B
P 6055 7160
AR Path="/639A0F2B" Ref="#PWR?"  Part="1" 
AR Path="/62E48B71/639A0F2B" Ref="#PWR?"  Part="1" 
AR Path="/63A22C28/639A0F2B" Ref="#PWR0116"  Part="1" 
F 0 "#PWR0116" H 6055 6910 50  0001 C CNN
F 1 "GND" H 6060 6987 50  0000 C CNN
F 2 "" H 6055 7160 50  0001 C CNN
F 3 "" H 6055 7160 50  0001 C CNN
	1    6055 7160
	1    0    0    -1  
$EndComp
Text Label 5095 6665 0    50   ~ 0
cs_ramwr
Wire Wire Line
	5090 5765 5555 5765
Entry Wire Line
	4990 5865 5090 5765
Text Label 5090 5765 0    50   ~ 0
d0
Wire Wire Line
	5090 5965 5555 5965
Entry Wire Line
	4990 6065 5090 5965
Text Label 5090 5965 0    50   ~ 0
d2
Wire Wire Line
	5090 6165 5555 6165
Entry Wire Line
	4990 6265 5090 6165
Text Label 5090 6165 0    50   ~ 0
d4
Wire Wire Line
	5090 6365 5555 6365
Entry Wire Line
	4990 6465 5090 6365
Text Label 5090 6365 0    50   ~ 0
d6
Wire Wire Line
	5090 5865 5555 5865
Entry Wire Line
	4990 5965 5090 5865
Text Label 5095 5865 0    50   ~ 0
d1
Wire Wire Line
	5090 6065 5555 6065
Entry Wire Line
	4990 6165 5090 6065
Text Label 5095 6065 0    50   ~ 0
d3
Wire Wire Line
	5090 6265 5555 6265
Entry Wire Line
	4990 6365 5090 6265
Text Label 5095 6265 0    50   ~ 0
d5
Wire Wire Line
	5090 6465 5555 6465
Text GLabel 4620 6565 0    50   Input ~ 0
d[0..7]
Entry Wire Line
	4990 6565 5090 6465
Text Label 5095 6465 0    50   ~ 0
d7
Wire Wire Line
	6555 5765 6660 5765
Entry Wire Line
	7825 5765 7925 5865
Wire Wire Line
	6555 5965 6860 5965
Entry Wire Line
	7825 5965 7925 6065
Wire Wire Line
	6555 6165 7275 6165
Entry Wire Line
	7825 6165 7925 6265
Wire Wire Line
	6555 6365 7475 6365
Entry Wire Line
	7825 6365 7925 6465
Wire Wire Line
	6555 5865 6760 5865
Entry Wire Line
	7825 5865 7925 5965
Wire Wire Line
	6555 6065 6960 6065
Entry Wire Line
	7825 6065 7925 6165
Wire Wire Line
	6555 6265 7375 6265
Entry Wire Line
	7825 6265 7925 6365
Wire Bus Line
	7925 6565 8255 6565
Wire Bus Line
	4620 6565 4990 6565
Text GLabel 8255 6565 2    50   Output ~ 0
p[0..7]
Text Label 7825 5765 2    50   ~ 0
p0
Text Label 7825 5965 2    50   ~ 0
p2
Text Label 7825 6165 2    50   ~ 0
p4
Text Label 7825 6365 2    50   ~ 0
p6
Text Label 7825 5865 2    50   ~ 0
p1
Text Label 7825 6065 2    50   ~ 0
p3
Text Label 7825 6265 2    50   ~ 0
p5
Text Label 7825 6465 2    50   ~ 0
p7
Text Label 7490 3860 2    50   ~ 0
p1
Text Label 5190 3760 0    50   ~ 0
p0
Text Label 7490 3760 2    50   ~ 0
p6
Text Label 7490 3660 2    50   ~ 0
p7
Entry Wire Line
	7490 3660 7590 3760
Entry Wire Line
	7490 3760 7590 3860
Entry Wire Line
	7490 3860 7590 3960
Entry Wire Line
	5190 3760 5090 3860
Wire Bus Line
	5090 3860 5090 4535
Wire Bus Line
	5090 4535 7590 4535
Wire Bus Line
	4540 4535 5090 4535
Text GLabel 4540 4535 0    50   Input ~ 0
~p~[0..7]
Connection ~ 5090 4535
Wire Bus Line
	5090 4535 5095 4535
Text Notes 7600 3490 0    50   ~ 0
INTERMEDIATE SIGNAL TO WORKAROUND\nGAL LIMITATIONS - LEAVE UNCONNECTED
Wire Wire Line
	7105 3460 7490 3460
NoConn ~ 7490 3460
Wire Wire Line
	4590 5430 4590 5635
Wire Wire Line
	4590 5935 4590 6120
Wire Wire Line
	6555 6465 7575 6465
Entry Wire Line
	7825 6465 7925 6565
$Comp
L 74xx:74LS573 U3
U 1 1 63DD8844
P 6055 6265
F 0 "U3" H 6255 6915 50  0000 C CNN
F 1 "74HCT573" H 6315 5585 50  0000 C CNN
F 2 "Package_SO:SO-20_5.3x12.6mm_P1.27mm" H 6055 6265 50  0001 C CNN
F 3 "74xx/74hc573.pdf" H 6055 6265 50  0001 C CNN
F 4 "595-SN74HCT573NSR" H 6055 6265 50  0001 C CNN "MouserPN"
F 5 "C2864941" H 6055 6265 50  0001 C CNN "LCSC"
	1    6055 6265
	1    0    0    -1  
$EndComp
Text Label 5095 6765 0    50   ~ 0
~u3enable
$Comp
L Timer:NE555D U15
U 1 1 63DF3FB7
P 3520 7350
F 0 "U15" H 3770 7705 50  0000 C CNN
F 1 "NE555" H 3735 6990 50  0000 C CNN
F 2 "Package_SO:SOIC-8_3.9x4.9mm_P1.27mm" H 4370 6950 50  0001 C CNN
F 3 "http://www.ti.com/lit/ds/symlink/ne555.pdf" H 4370 6950 50  0001 C CNN
F 4 "C5125085" H 3520 7350 50  0001 C CNN "LCSC"
	1    3520 7350
	1    0    0    -1  
$EndComp
Wire Wire Line
	3520 6950 3520 6860
$Comp
L power:+5V #PWR?
U 1 1 63DF5EBC
P 3520 6860
AR Path="/63DF5EBC" Ref="#PWR?"  Part="1" 
AR Path="/62E48B71/63DF5EBC" Ref="#PWR?"  Part="1" 
AR Path="/63A22C28/63DF5EBC" Ref="#PWR028"  Part="1" 
F 0 "#PWR028" H 3520 6710 50  0001 C CNN
F 1 "+5V" H 3535 7033 50  0000 C CNN
F 2 "" H 3520 6860 50  0001 C CNN
F 3 "" H 3520 6860 50  0001 C CNN
	1    3520 6860
	1    0    0    -1  
$EndComp
Wire Wire Line
	3520 8170 3520 8070
$Comp
L power:GND #PWR?
U 1 1 63DFD090
P 3520 8170
AR Path="/63DFD090" Ref="#PWR?"  Part="1" 
AR Path="/62E48B71/63DFD090" Ref="#PWR?"  Part="1" 
AR Path="/63A22C28/63DFD090" Ref="#PWR029"  Part="1" 
F 0 "#PWR029" H 3520 7920 50  0001 C CNN
F 1 "GND" H 3525 7997 50  0000 C CNN
F 2 "" H 3520 8170 50  0001 C CNN
F 3 "" H 3520 8170 50  0001 C CNN
	1    3520 8170
	1    0    0    -1  
$EndComp
$Comp
L Device:C C16
U 1 1 63E09791
P 2905 7825
F 0 "C16" H 2790 7871 50  0000 R CNN
F 1 "10n" H 2790 7780 50  0000 R CNN
F 2 "Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder" H 2943 7675 50  0001 C CNN
F 3 "~" H 2905 7825 50  0001 C CNN
F 4 "C1710" H 2905 7825 50  0001 C CNN "LCSC"
	1    2905 7825
	1    0    0    -1  
$EndComp
Wire Wire Line
	2905 7975 2905 8070
Wire Wire Line
	2905 8070 3520 8070
Connection ~ 3520 8070
Wire Wire Line
	3520 8070 3520 7750
Wire Wire Line
	3520 8070 4225 8070
Wire Wire Line
	4225 8070 4225 7550
Wire Wire Line
	4225 7550 4020 7550
Wire Wire Line
	3020 7350 2905 7350
Wire Wire Line
	2905 7350 2905 7675
Wire Wire Line
	3020 7550 2455 7550
Wire Wire Line
	3020 7150 2730 7150
NoConn ~ 4020 7350
Text Notes 3005 7250 0    50   ~ 0
~SET
Text Notes 2915 7665 0    50   ~ 0
~RESET
Wire Wire Line
	4990 7150 4020 7150
Text GLabel 2730 7150 0    50   Input ~ 0
~RESET
Text Label 2455 7550 0    50   ~ 0
~cs_ramwr
Text Notes 3095 8545 0    50   ~ 0
BISTABLE CONFIGURATION
Wire Wire Line
	4990 6765 5555 6765
Wire Wire Line
	4990 6765 4990 7150
Wire Wire Line
	5555 6665 5095 6665
$Comp
L Device:R_Pack04 RN1
U 1 1 63EB16B5
P 6760 5425
F 0 "RN1" H 6480 5425 50  0000 R CNN
F 1 "1k" H 6948 5380 50  0001 L CNN
F 2 "Resistor_SMD:R_Array_Convex_4x0603" V 7035 5425 50  0001 C CNN
F 3 "~" H 6760 5425 50  0001 C CNN
F 4 "C20197" H 6760 5425 50  0001 C CNN "LCSC"
	1    6760 5425
	-1   0    0    -1  
$EndComp
$Comp
L Device:R_Pack04 RN2
U 1 1 63EB357C
P 7375 5425
F 0 "RN2" H 7095 5471 50  0000 R CNN
F 1 "1k" H 7095 5380 50  0000 R CNN
F 2 "Resistor_SMD:R_Array_Convex_4x0603" V 7650 5425 50  0001 C CNN
F 3 "~" H 7375 5425 50  0001 C CNN
F 4 "C20197" H 7375 5425 50  0001 C CNN "LCSC"
	1    7375 5425
	-1   0    0    -1  
$EndComp
Wire Wire Line
	6660 5625 6660 5765
Connection ~ 6660 5765
Wire Wire Line
	6660 5765 7825 5765
Wire Wire Line
	6760 5625 6760 5865
Connection ~ 6760 5865
Wire Wire Line
	6760 5865 7825 5865
Wire Wire Line
	6860 5625 6860 5965
Connection ~ 6860 5965
Wire Wire Line
	6860 5965 7825 5965
Wire Wire Line
	6960 5625 6960 6065
Connection ~ 6960 6065
Wire Wire Line
	6960 6065 7825 6065
Wire Wire Line
	7275 5625 7275 6165
Connection ~ 7275 6165
Wire Wire Line
	7275 6165 7825 6165
Wire Wire Line
	7375 5625 7375 6265
Connection ~ 7375 6265
Wire Wire Line
	7375 6265 7825 6265
Wire Wire Line
	7475 5625 7475 6365
Connection ~ 7475 6365
Wire Wire Line
	7475 6365 7825 6365
Wire Wire Line
	7575 5625 7575 6465
Connection ~ 7575 6465
Wire Wire Line
	7575 6465 7825 6465
Wire Wire Line
	6660 5225 6660 5145
Wire Wire Line
	6660 5145 6760 5145
Wire Wire Line
	7575 5145 7575 5225
Wire Wire Line
	7475 5225 7475 5145
Connection ~ 7475 5145
Wire Wire Line
	7475 5145 7575 5145
Wire Wire Line
	7375 5225 7375 5145
Connection ~ 7375 5145
Wire Wire Line
	7375 5145 7475 5145
Wire Wire Line
	7275 5225 7275 5145
Connection ~ 7275 5145
Wire Wire Line
	7275 5145 7375 5145
Wire Wire Line
	6960 5225 6960 5145
Connection ~ 6960 5145
Wire Wire Line
	6960 5145 7275 5145
Wire Wire Line
	6860 5225 6860 5145
Connection ~ 6860 5145
Wire Wire Line
	6860 5145 6960 5145
Wire Wire Line
	6760 5225 6760 5145
Connection ~ 6760 5145
Wire Wire Line
	6760 5145 6860 5145
Wire Wire Line
	6660 5145 6660 5055
$Comp
L power:+5V #PWR?
U 1 1 63F3A657
P 6660 5055
AR Path="/63F3A657" Ref="#PWR?"  Part="1" 
AR Path="/62E48B71/63F3A657" Ref="#PWR?"  Part="1" 
AR Path="/63A22C28/63F3A657" Ref="#PWR030"  Part="1" 
F 0 "#PWR030" H 6660 4905 50  0001 C CNN
F 1 "+5V" H 6675 5228 50  0000 C CNN
F 2 "" H 6660 5055 50  0001 C CNN
F 3 "" H 6660 5055 50  0001 C CNN
	1    6660 5055
	1    0    0    -1  
$EndComp
Connection ~ 6660 5145
$Comp
L 74xx:74LS245 U4
U 1 1 63F45705
P 11575 7495
F 0 "U4" H 11790 8140 50  0000 C CNN
F 1 "74HCT245" H 11800 6830 50  0000 C CNN
F 2 "Package_SO:SO-20_5.3x12.6mm_P1.27mm" H 11575 7495 50  0001 C CNN
F 3 "http://www.ti.com/lit/gpn/sn74LS245" H 11575 7495 50  0001 C CNN
F 4 "595-SN74HCT245ANSR" H 11575 7495 50  0001 C CNN "MouserPN"
F 5 "C133641" H 11575 7495 50  0001 C CNN "LCSC"
	1    11575 7495
	1    0    0    -1  
$EndComp
Wire Wire Line
	10560 7995 11075 7995
Wire Wire Line
	11575 8295 11575 8380
Wire Wire Line
	10970 7895 10970 6650
Wire Wire Line
	10970 6650 11575 6650
Connection ~ 11575 6650
Wire Wire Line
	11575 6650 11575 6695
Wire Wire Line
	10970 7895 11075 7895
$Comp
L Device:C C?
U 1 1 63FF0E8D
P 13030 6975
AR Path="/63FF0E8D" Ref="C?"  Part="1" 
AR Path="/62E48B71/63FF0E8D" Ref="C?"  Part="1" 
AR Path="/63A22C28/63FF0E8D" Ref="C4"  Part="1" 
F 0 "C4" H 12915 7021 50  0000 R CNN
F 1 "100n" H 12915 6930 50  0000 R CNN
F 2 "Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder" H 13068 6825 50  0001 C CNN
F 3 "~" H 13030 6975 50  0001 C CNN
F 4 "C49678" H 13030 6975 50  0001 C CNN "LCSC"
	1    13030 6975
	1    0    0    -1  
$EndComp
$Comp
L power:GND #PWR?
U 1 1 63FF11BF
P 13030 7310
AR Path="/63FF11BF" Ref="#PWR?"  Part="1" 
AR Path="/62E48B71/63FF11BF" Ref="#PWR?"  Part="1" 
AR Path="/63A22C28/63FF11BF" Ref="#PWR0101"  Part="1" 
F 0 "#PWR0101" H 13030 7060 50  0001 C CNN
F 1 "GND" H 13035 7137 50  0000 C CNN
F 2 "" H 13030 7310 50  0001 C CNN
F 3 "" H 13030 7310 50  0001 C CNN
	1    13030 7310
	1    0    0    -1  
$EndComp
$Comp
L power:+5V #PWR?
U 1 1 63FF11C9
P 13030 6620
AR Path="/63FF11C9" Ref="#PWR?"  Part="1" 
AR Path="/62E48B71/63FF11C9" Ref="#PWR?"  Part="1" 
AR Path="/63A22C28/63FF11C9" Ref="#PWR0115"  Part="1" 
F 0 "#PWR0115" H 13030 6470 50  0001 C CNN
F 1 "+5V" H 13045 6793 50  0000 C CNN
F 2 "" H 13030 6620 50  0001 C CNN
F 3 "" H 13030 6620 50  0001 C CNN
	1    13030 6620
	1    0    0    -1  
$EndComp
Wire Wire Line
	13030 6620 13030 6825
Wire Wire Line
	13030 7125 13030 7310
$Comp
L Device:C C?
U 1 1 63FFE9A0
P 2150 7325
AR Path="/63FFE9A0" Ref="C?"  Part="1" 
AR Path="/62E48B71/63FFE9A0" Ref="C?"  Part="1" 
AR Path="/63A22C28/63FFE9A0" Ref="C15"  Part="1" 
F 0 "C15" H 2035 7371 50  0000 R CNN
F 1 "100n" H 2035 7280 50  0000 R CNN
F 2 "Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder" H 2188 7175 50  0001 C CNN
F 3 "~" H 2150 7325 50  0001 C CNN
F 4 "C49678" H 2150 7325 50  0001 C CNN "LCSC"
	1    2150 7325
	1    0    0    -1  
$EndComp
$Comp
L power:GND #PWR?
U 1 1 63FFED00
P 2150 7660
AR Path="/63FFED00" Ref="#PWR?"  Part="1" 
AR Path="/62E48B71/63FFED00" Ref="#PWR?"  Part="1" 
AR Path="/63A22C28/63FFED00" Ref="#PWR0117"  Part="1" 
F 0 "#PWR0117" H 2150 7410 50  0001 C CNN
F 1 "GND" H 2155 7487 50  0000 C CNN
F 2 "" H 2150 7660 50  0001 C CNN
F 3 "" H 2150 7660 50  0001 C CNN
	1    2150 7660
	1    0    0    -1  
$EndComp
$Comp
L power:+5V #PWR?
U 1 1 63FFED0A
P 2150 6970
AR Path="/63FFED0A" Ref="#PWR?"  Part="1" 
AR Path="/62E48B71/63FFED0A" Ref="#PWR?"  Part="1" 
AR Path="/63A22C28/63FFED0A" Ref="#PWR0118"  Part="1" 
F 0 "#PWR0118" H 2150 6820 50  0001 C CNN
F 1 "+5V" H 2165 7143 50  0000 C CNN
F 2 "" H 2150 6970 50  0001 C CNN
F 3 "" H 2150 6970 50  0001 C CNN
	1    2150 6970
	1    0    0    -1  
$EndComp
Wire Wire Line
	2150 6970 2150 7175
Wire Wire Line
	2150 7475 2150 7660
Text Label 7490 2960 2    50   ~ 0
~cs_ramwr
Wire Wire Line
	7105 3360 7490 3360
Text Label 7490 3360 2    50   ~ 0
cs_ramwr
Wire Bus Line
	7590 3760 7590 4535
Wire Bus Line
	12440 7095 12440 7795
Wire Bus Line
	4990 5865 4990 6565
Wire Bus Line
	7925 5865 7925 6565
Wire Bus Line
	5090 2250 5090 3460
Wire Bus Line
	13035 2450 13035 5755
Wire Bus Line
	10285 2250 10285 4950
$EndSCHEMATC