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 "Hannes512: C16/+4 512 kB RAM Expansion"
Date "2023-02-21"
Rev "1git"
Comp "SukkoPera"
Comment1 "Hannes Version (Update 1 with \"TED Feature\")"
Comment2 "Based on drawings by Solder/Synergy"
Comment3 "Thanks to TLC and eslapion!"
Comment4 "Licensed under CC BY-NC-SA 4.0"
$EndDescr
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
Wire Wire Line
	4415 3360 4415 3460
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="C7"  Part="1" 
F 0 "C7" 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"
	1    4415 3210
	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="#PWR015"  Part="1" 
F 0 "#PWR015" 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 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="C5"  Part="1" 
F 0 "C5" 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="#PWR017"  Part="1" 
F 0 "#PWR017" 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="#PWR016"  Part="1" 
F 0 "#PWR016" 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.
$Comp
L power:+5V #PWR?
U 1 1 640F5993
P 7255 2630
AR Path="/640F5993" Ref="#PWR?"  Part="1" 
AR Path="/62E48B71/640F5993" Ref="#PWR?"  Part="1" 
AR Path="/63A22C28/640F5993" Ref="#PWR024"  Part="1" 
F 0 "#PWR024" 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
	7255 2760 7255 2630
Wire Wire Line
	7105 2760 7255 2760
Wire Wire Line
	5475 3860 5475 3975
Wire Wire Line
	5605 3860 5475 3860
Wire Wire Line
	5550 3160 5605 3160
Entry Wire Line
	5090 3460 5190 3560
Entry Wire Line
	5090 3360 5190 3460
Entry Wire Line
	5090 3260 5190 3360
Entry Wire Line
	5090 3160 5190 3260
Text Label 5190 3460 0    50   ~ 0
a14
Wire Wire Line
	5605 3460 5190 3460
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 U7
U 1 1 63F7FBC6
P 6355 3310
F 0 "U7" 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
	1    6355 3310
	1    0    0    -1  
$EndComp
Text GLabel 7730 2960 2    50   Output ~ 0
~CS_OUT
Text GLabel 5550 3160 0    50   Input ~ 0
~CS_IN
Entry Wire Line
	5090 2860 5190 2960
Entry Wire Line
	5090 2760 5190 2860
Entry Wire Line
	5090 2660 5190 2760
Text GLabel 4535 2250 0    50   Input ~ 0
a[0..18]
$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="#PWR020"  Part="1" 
F 0 "#PWR020" 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
Text Label 5190 2960 0    50   ~ 0
a3
Wire Wire Line
	5605 2960 5190 2960
Text Label 5190 2860 0    50   ~ 0
a2
Wire Wire Line
	5605 2860 5190 2860
Text Label 5190 2760 0    50   ~ 0
a1
Wire Wire Line
	5605 2760 5190 2760
Text Label 5190 3060 0    50   ~ 0
a0
Wire Wire Line
	5605 3060 5190 3060
Wire Wire Line
	5190 3760 5605 3760
Wire Wire Line
	7490 3860 7105 3860
Wire Wire Line
	7105 3760 7490 3760
Wire Wire Line
	7105 3660 7490 3660
Wire Wire Line
	7105 2960 7730 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="#PWR014"  Part="1" 
F 0 "#PWR014" 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
Wire Wire Line
	7105 2860 7345 2860
Wire Wire Line
	7345 2860 7345 2760
Wire Wire Line
	7345 2760 7825 2760
Text GLabel 7825 2760 2    50   Input ~ 0
R_~W
Text Label 12340 7695 2    50   ~ 0
d7
Entry Wire Line
	12440 7795 12340 7695
Wire Bus Line
	12440 7795 12970 7795
Text GLabel 12970 7795 2    50   Output ~ 0
d[0..7]
Wire Wire Line
	12340 7695 12075 7695
Wire Wire Line
	12075 6995 12340 6995
Wire Wire Line
	12075 7095 12340 7095
Wire Wire Line
	12075 7195 12340 7195
Wire Wire Line
	12075 7295 12340 7295
Wire Wire Line
	12075 7395 12340 7395
Wire Wire Line
	12075 7495 12340 7495
Wire Wire Line
	12075 7595 12340 7595
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
	12440 7195 12340 7095
Entry Wire Line
	12440 7295 12340 7195
Entry Wire Line
	12440 7395 12340 7295
Entry Wire Line
	12440 7495 12340 7395
Entry Wire Line
	12440 7595 12340 7495
Entry Wire Line
	12440 7695 12340 7595
Entry Wire Line
	12440 7095 12340 6995
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="#PWR025"  Part="1" 
F 0 "#PWR025" 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="#PWR026"  Part="1" 
F 0 "#PWR026" 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 3060 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 2520 2    50   ~ 0
GAL22V10 CAN BE\nUSED AS WELL
Text Notes 8095 3060 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="#PWR021"  Part="1" 
F 0 "#PWR021" 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="#PWR022"  Part="1" 
F 0 "#PWR022" 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
p2
Text Label 7490 3760 2    50   ~ 0
p0
Text Label 7490 3660 2    50   ~ 0
p6
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
Wire Wire Line
	7105 3460 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 U5
U 1 1 63DD8844
P 6055 6265
F 0 "U5" 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 U4
U 1 1 63DF3FB7
P 3520 7350
F 0 "U4" 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="#PWR012"  Part="1" 
F 0 "#PWR012" 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="#PWR013"  Part="1" 
F 0 "#PWR013" 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 C3
U 1 1 63E09791
P 2905 7825
F 0 "C3" 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 7150 2695 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 2695 7150 0    50   Input ~ 0
~RESET
Text Label 1230 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="#PWR023"  Part="1" 
F 0 "#PWR023" 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 U6
U 1 1 63F45705
P 11575 7495
F 0 "U6" 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 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="#PWR028"  Part="1" 
F 0 "#PWR028" 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="#PWR027"  Part="1" 
F 0 "#PWR027" 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 4650 7845
AR Path="/63FFE9A0" Ref="C?"  Part="1" 
AR Path="/62E48B71/63FFE9A0" Ref="C?"  Part="1" 
AR Path="/63A22C28/63FFE9A0" Ref="C4"  Part="1" 
F 0 "C4" H 4535 7891 50  0000 R CNN
F 1 "100n" H 4535 7800 50  0000 R CNN
F 2 "Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder" H 4688 7695 50  0001 C CNN
F 3 "~" H 4650 7845 50  0001 C CNN
F 4 "C49678" H 4650 7845 50  0001 C CNN "LCSC"
	1    4650 7845
	1    0    0    -1  
$EndComp
$Comp
L power:GND #PWR?
U 1 1 63FFED00
P 4650 8180
AR Path="/63FFED00" Ref="#PWR?"  Part="1" 
AR Path="/62E48B71/63FFED00" Ref="#PWR?"  Part="1" 
AR Path="/63A22C28/63FFED00" Ref="#PWR019"  Part="1" 
F 0 "#PWR019" H 4650 7930 50  0001 C CNN
F 1 "GND" H 4655 8007 50  0000 C CNN
F 2 "" H 4650 8180 50  0001 C CNN
F 3 "" H 4650 8180 50  0001 C CNN
	1    4650 8180
	1    0    0    -1  
$EndComp
$Comp
L power:+5V #PWR?
U 1 1 63FFED0A
P 4650 7490
AR Path="/63FFED0A" Ref="#PWR?"  Part="1" 
AR Path="/62E48B71/63FFED0A" Ref="#PWR?"  Part="1" 
AR Path="/63A22C28/63FFED0A" Ref="#PWR018"  Part="1" 
F 0 "#PWR018" H 4650 7340 50  0001 C CNN
F 1 "+5V" H 4665 7663 50  0000 C CNN
F 2 "" H 4650 7490 50  0001 C CNN
F 3 "" H 4650 7490 50  0001 C CNN
	1    4650 7490
	1    0    0    -1  
$EndComp
Wire Wire Line
	4650 7490 4650 7695
Wire Wire Line
	4650 7995 4650 8180
Wire Wire Line
	7105 3360 7490 3360
Text Label 7490 3160 2    50   ~ 0
cs_ramwr
Text Notes 8090 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\nU3 OR U4.
Text GLabel 5125 3660 0    50   Input ~ 0
AEC
Wire Wire Line
	5605 3660 5125 3660
$Comp
L 74xx:74HCT02 U?
U 1 1 641A3A28
P 7315 9925
AR Path="/62E48B71/641A3A28" Ref="U?"  Part="1" 
AR Path="/63A22C28/641A3A28" Ref="U3"  Part="1" 
F 0 "U3" H 7315 10250 50  0000 C CNN
F 1 "74HCT02" H 7315 10159 50  0000 C CNN
F 2 "Package_SO:SOIC-14_3.9x8.7mm_P1.27mm" H 7315 9925 50  0001 C CNN
F 3 "http://www.ti.com/lit/gpn/sn74hct02" H 7315 9925 50  0001 C CNN
F 4 "C471050" H 7315 9925 50  0001 C CNN "LCSC"
F 5 "771-74HCT02D-T" H 7315 9925 50  0001 C CNN "MouserPN"
	1    7315 9925
	1    0    0    -1  
$EndComp
$Comp
L 74xx:74HCT02 U?
U 2 1 641A3A2E
P 6460 9925
AR Path="/62E48B71/641A3A2E" Ref="U?"  Part="2" 
AR Path="/63A22C28/641A3A2E" Ref="U3"  Part="2" 
F 0 "U3" H 6460 10250 50  0000 C CNN
F 1 "74HCT02" H 6460 10159 50  0000 C CNN
F 2 "Package_SO:SOIC-14_3.9x8.7mm_P1.27mm" H 6460 9925 50  0001 C CNN
F 3 "http://www.ti.com/lit/gpn/sn74hct02" H 6460 9925 50  0001 C CNN
F 4 "C471050" H 6460 9925 50  0001 C CNN "LCSC"
F 5 "771-74HCT02D-T" H 6460 9925 50  0001 C CNN "MouserPN"
	2    6460 9925
	1    0    0    -1  
$EndComp
$Comp
L 74xx:74HCT02 U?
U 3 1 641A3A34
P 5400 9825
AR Path="/62E48B71/641A3A34" Ref="U?"  Part="3" 
AR Path="/63A22C28/641A3A34" Ref="U3"  Part="3" 
F 0 "U3" H 5400 10150 50  0000 C CNN
F 1 "74HCT02" H 5400 10059 50  0000 C CNN
F 2 "Package_SO:SOIC-14_3.9x8.7mm_P1.27mm" H 5400 9825 50  0001 C CNN
F 3 "http://www.ti.com/lit/gpn/sn74hct02" H 5400 9825 50  0001 C CNN
F 4 "C471050" H 5400 9825 50  0001 C CNN "LCSC"
F 5 "771-74HCT02D-T" H 5400 9825 50  0001 C CNN "MouserPN"
	3    5400 9825
	1    0    0    -1  
$EndComp
$Comp
L 74xx:74HCT02 U?
U 5 1 641A3A40
P 845 10205
AR Path="/62E48B71/641A3A40" Ref="U?"  Part="5" 
AR Path="/63A22C28/641A3A40" Ref="U3"  Part="5" 
F 0 "U3" H 1075 10251 50  0000 L CNN
F 1 "74HCT02" H 1075 10160 50  0000 L CNN
F 2 "Package_SO:SOIC-14_3.9x8.7mm_P1.27mm" H 845 10205 50  0001 C CNN
F 3 "http://www.ti.com/lit/gpn/sn74hct02" H 845 10205 50  0001 C CNN
F 4 "C471050" H 845 10205 50  0001 C CNN "LCSC"
F 5 "771-74HCT02D-T" H 845 10205 50  0001 C CNN "MouserPN"
	5    845  10205
	1    0    0    -1  
$EndComp
$Comp
L Device:C C?
U 1 1 641A3A46
P 1680 10200
AR Path="/641A3A46" Ref="C?"  Part="1" 
AR Path="/62E48B71/641A3A46" Ref="C?"  Part="1" 
AR Path="/63A22C28/641A3A46" Ref="C2"  Part="1" 
F 0 "C2" H 1795 10246 50  0000 L CNN
F 1 "100n" H 1795 10155 50  0000 L CNN
F 2 "Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder" H 1718 10050 50  0001 C CNN
F 3 "~" H 1680 10200 50  0001 C CNN
F 4 "C49678" H 1680 10200 50  0001 C CNN "LCSC"
	1    1680 10200
	1    0    0    -1  
$EndComp
$Comp
L power:GND #PWR?
U 1 1 641A3A4C
P 1270 10955
AR Path="/641A3A4C" Ref="#PWR?"  Part="1" 
AR Path="/62E48B71/641A3A4C" Ref="#PWR?"  Part="1" 
AR Path="/63A22C28/641A3A4C" Ref="#PWR011"  Part="1" 
F 0 "#PWR011" H 1270 10705 50  0001 C CNN
F 1 "GND" H 1270 10805 50  0000 C CNN
F 2 "" H 1270 10955 50  0001 C CNN
F 3 "" H 1270 10955 50  0001 C CNN
	1    1270 10955
	1    0    0    -1  
$EndComp
Wire Wire Line
	1270 9590 1270 9490
Wire Wire Line
	1270 10855 1270 10955
$Comp
L power:+5V #PWR?
U 1 1 641A3A54
P 1270 9490
AR Path="/641A3A54" Ref="#PWR?"  Part="1" 
AR Path="/62E48B71/641A3A54" Ref="#PWR?"  Part="1" 
AR Path="/63A22C28/641A3A54" Ref="#PWR010"  Part="1" 
F 0 "#PWR010" H 1270 9340 50  0001 C CNN
F 1 "+5V" H 1285 9663 50  0000 C CNN
F 2 "" H 1270 9490 50  0001 C CNN
F 3 "" H 1270 9490 50  0001 C CNN
	1    1270 9490
	1    0    0    -1  
$EndComp
Wire Wire Line
	845  9705 845  9590
Wire Wire Line
	845  9590 1270 9590
Wire Wire Line
	1680 9590 1680 10050
Wire Wire Line
	1680 10350 1680 10855
Wire Wire Line
	1680 10855 1270 10855
Wire Wire Line
	845  10855 845  10705
Connection ~ 1270 10855
Wire Wire Line
	1270 10855 845  10855
Connection ~ 1270 9590
Wire Wire Line
	1270 9590 1680 9590
Wire Wire Line
	5100 9725 4885 9725
Wire Wire Line
	5100 9925 4885 9925
Wire Wire Line
	5700 9825 6160 9825
Text GLabel 4885 9925 0    50   Input ~ 0
R_~W
Text GLabel 4885 9725 0    50   Input ~ 0
CLKOUT
Wire Wire Line
	6160 10025 5940 10025
Text GLabel 5940 10025 0    50   Input ~ 0
~CAS_64K
Wire Wire Line
	6760 9925 6900 9925
Wire Wire Line
	6900 9925 6900 9825
Wire Wire Line
	6900 9825 7015 9825
Wire Wire Line
	6900 9925 6900 10025
Wire Wire Line
	6900 10025 7015 10025
Connection ~ 6900 9925
Wire Wire Line
	7615 9925 7850 9925
Text Notes 5755 10545 0    50   ~ 0
THIS CIRCUIT WAS DERIVED\nFROM WORK BY ESLAPION
$Comp
L 74xx:74HCT02 U?
U 4 1 641A3A3A
P 2100 7550
AR Path="/62E48B71/641A3A3A" Ref="U?"  Part="4" 
AR Path="/63A22C28/641A3A3A" Ref="U3"  Part="4" 
F 0 "U3" H 2100 7875 50  0000 C CNN
F 1 "74HCT02" H 2100 7784 50  0000 C CNN
F 2 "Package_SO:SOIC-14_3.9x8.7mm_P1.27mm" H 2100 7550 50  0001 C CNN
F 3 "http://www.ti.com/lit/gpn/sn74hct02" H 2100 7550 50  0001 C CNN
F 4 "C471050" H 2100 7550 50  0001 C CNN "LCSC"
F 5 "771-74HCT02D-T" H 2100 7550 50  0001 C CNN "MouserPN"
	4    2100 7550
	1    0    0    -1  
$EndComp
Wire Wire Line
	1800 7450 1665 7450
Wire Wire Line
	1665 7450 1665 7550
Wire Wire Line
	1665 7650 1800 7650
Wire Wire Line
	1665 7550 1230 7550
Connection ~ 1665 7550
Wire Wire Line
	1665 7550 1665 7650
Text Notes 8095 3160 0    50   ~ 0
$FD16 WRITE (NOTE: ACTIVE *HIGH*!)
Wire Wire Line
	7105 3560 7490 3560
Text Label 7490 3560 2    50   ~ 0
p7
Entry Wire Line
	7490 3560 7590 3660
Wire Wire Line
	7105 3160 7490 3160
Wire Wire Line
	7105 3060 7490 3060
Text Label 7490 3260 2    50   ~ 0
a16
Text Label 7490 3360 2    50   ~ 0
a17
Text Label 7490 3460 2    50   ~ 0
a18
Entry Wire Line
	7490 3260 7590 3160
Entry Wire Line
	7490 3360 7590 3260
Entry Wire Line
	7490 3460 7590 3360
Wire Bus Line
	4535 2250 5090 2250
Connection ~ 5090 2250
Wire Bus Line
	5090 2250 7590 2250
Entry Wire Line
	10560 7695 10460 7595
Entry Wire Line
	10560 7495 10460 7395
Entry Wire Line
	10560 7295 10460 7195
Entry Wire Line
	10560 7095 10460 6995
Entry Wire Line
	10560 7595 10460 7495
Entry Wire Line
	10560 7395 10460 7295
Entry Wire Line
	10560 7195 10460 7095
Wire Bus Line
	10460 6895 10130 6895
Text GLabel 10130 6895 0    50   Input ~ 0
p[0..7]
Entry Wire Line
	10560 6995 10460 6895
Text GLabel 7850 9925 2    50   Output ~ 0
~SRAM_CE
$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="C6"  Part="1" 
F 0 "C6" 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
Text Label 2420 7550 0    50   ~ 0
~cs_ramwr
Wire Wire Line
	2400 7550 3020 7550
Wire Bus Line
	7590 2250 7590 3360
Wire Bus Line
	7590 3660 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
	10460 6895 10460 7595
Wire Bus Line
	5090 2250 5090 3460
$EndSCHEMATC