SRAM.sch

EESchema Schematic File Version 4
EELAYER 30 0
EELAYER END
$Descr A4 11693 8268
encoding utf-8
Sheet 5 15
Title "SRAM"
Date ""
Rev ""
Comp ""
Comment1 ""
Comment2 ""
Comment3 "Editor: Matthew Frances"
Comment4 "Designer: Brian Cruz"
$EndDescr
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L Memory_RAM:CY7C199 U9
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L power:VCC #PWR0119
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L power:VCC #PWR0121
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L power:VCC #PWR0127
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L power:VCC #PWR0128
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L power:GND #PWR0129
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$EndComp
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L power:GND #PWR0130
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$EndComp
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L power:GND #PWR0131
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$EndComp
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L power:GND #PWR0133
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L power:VCC #PWR0134
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L 74xx:74LS138 U5
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$EndComp
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L power:GND #PWR0135
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$EndComp
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L power:VCC #PWR0136
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$EndComp
$Comp
L 74xx:74LS138 U4
U 1 1 61AD932E
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	7150 4525 7050 4425
Entry Wire Line
	7150 4625 7050 4525
Entry Wire Line
	7150 4725 7050 4625
Entry Wire Line
	7150 4825 7050 4725
Text HLabel 7150 5125 2    50   BiDi ~ 0
D[0..15]
Wire Wire Line
	1350 4925 2400 4925
$Comp
L Device:C C7
U 1 1 61AB8F40
P 1250 6750
F 0 "C7" H 1365 6796 50  0000 L CNN
F 1 "100nF" H 1365 6705 50  0000 L CNN
F 2 "Capacitor_THT:C_Rect_L4.0mm_W2.5mm_P2.50mm" H 1288 6600 50  0001 C CNN
F 3 "~" H 1250 6750 50  0001 C CNN
	1    1250 6750
	1    0    0    -1  
$EndComp
$Comp
L Device:C C8
U 1 1 61AF79B9
P 1750 6750
F 0 "C8" H 1865 6796 50  0000 L CNN
F 1 "100nF" H 1865 6705 50  0000 L CNN
F 2 "Capacitor_THT:C_Rect_L4.0mm_W2.5mm_P2.50mm" H 1788 6600 50  0001 C CNN
F 3 "~" H 1750 6750 50  0001 C CNN
	1    1750 6750
	1    0    0    -1  
$EndComp
$Comp
L Device:C C9
U 1 1 61AF7D5B
P 2250 6750
F 0 "C9" H 2365 6796 50  0000 L CNN
F 1 "100nF" H 2365 6705 50  0000 L CNN
F 2 "Capacitor_THT:C_Rect_L4.0mm_W2.5mm_P2.50mm" H 2288 6600 50  0001 C CNN
F 3 "~" H 2250 6750 50  0001 C CNN
	1    2250 6750
	1    0    0    -1  
$EndComp
$Comp
L Device:C C10
U 1 1 61B07796
P 2750 6750
F 0 "C10" H 2865 6796 50  0000 L CNN
F 1 "100nF" H 2865 6705 50  0000 L CNN
F 2 "Capacitor_THT:C_Rect_L4.0mm_W2.5mm_P2.50mm" H 2788 6600 50  0001 C CNN
F 3 "~" H 2750 6750 50  0001 C CNN
	1    2750 6750
	1    0    0    -1  
$EndComp
$Comp
L Device:C C11
U 1 1 61B07808
P 3250 6750
F 0 "C11" H 3365 6796 50  0000 L CNN
F 1 "100nF" H 3365 6705 50  0000 L CNN
F 2 "Capacitor_THT:C_Rect_L4.0mm_W2.5mm_P2.50mm" H 3288 6600 50  0001 C CNN
F 3 "~" H 3250 6750 50  0001 C CNN
	1    3250 6750
	1    0    0    -1  
$EndComp
$Comp
L Device:C C12
U 1 1 61B07812
P 3750 6750
F 0 "C12" H 3865 6796 50  0000 L CNN
F 1 "100nF" H 3865 6705 50  0000 L CNN
F 2 "Capacitor_THT:C_Rect_L4.0mm_W2.5mm_P2.50mm" H 3788 6600 50  0001 C CNN
F 3 "~" H 3750 6750 50  0001 C CNN
	1    3750 6750
	1    0    0    -1  
$EndComp
$Comp
L power:VCC #PWR0137
U 1 1 61B1039C
P 2500 6500
F 0 "#PWR0137" H 2500 6350 50  0001 C CNN
F 1 "VCC" H 2515 6673 50  0000 C CNN
F 2 "" H 2500 6500 50  0001 C CNN
F 3 "" H 2500 6500 50  0001 C CNN
	1    2500 6500
	1    0    0    -1  
$EndComp
$Comp
L power:GND #PWR0138
U 1 1 61B10828
P 2500 7000
F 0 "#PWR0138" H 2500 6750 50  0001 C CNN
F 1 "GND" H 2505 6827 50  0000 C CNN
F 2 "" H 2500 7000 50  0001 C CNN
F 3 "" H 2500 7000 50  0001 C CNN
	1    2500 7000
	1    0    0    -1  
$EndComp
Wire Wire Line
	1250 6600 1750 6600
Connection ~ 1750 6600
Wire Wire Line
	1750 6600 2250 6600
Connection ~ 2250 6600
Wire Wire Line
	2250 6600 2500 6600
Connection ~ 2750 6600
Wire Wire Line
	2750 6600 3250 6600
Connection ~ 3250 6600
Wire Wire Line
	3250 6600 3750 6600
Wire Wire Line
	3750 6900 3250 6900
Connection ~ 1750 6900
Wire Wire Line
	1750 6900 1250 6900
Connection ~ 2250 6900
Wire Wire Line
	2250 6900 1750 6900
Connection ~ 2750 6900
Wire Wire Line
	2750 6900 2500 6900
Connection ~ 3250 6900
Wire Wire Line
	3250 6900 2750 6900
Wire Wire Line
	2500 6500 2500 6600
Connection ~ 2500 6600
Wire Wire Line
	2500 6600 2750 6600
Wire Wire Line
	2500 7000 2500 6900
Connection ~ 2500 6900
Wire Wire Line
	2500 6900 2250 6900
Text Notes 750  1125 0    100  ~ 0
128kB SRAM\nAddresses 0x00000 to 0x1FFFF
Text Notes 1450 1700 0    50   ~ 0
Address decoding/chip select
Text Notes 2150 6175 0    50   ~ 0
Power decoupling
Text Notes 6700 3400 0    50   ~ 0
SRAM memory chips
Wire Bus Line
	1250 2000 1250 4825
Wire Bus Line
	7150 4225 7150 5125
Wire Bus Line
	9850 4200 9850 5100
Wire Bus Line
	9425 1225 9425 2125
Wire Bus Line
	6575 1225 6575 2125
Wire Bus Line
	4750 875  4750 2425
Wire Bus Line
	7600 875  7600 2425
Wire Bus Line
	5325 3875 5325 5425
Wire Bus Line
	8025 3850 8025 5400
$EndSCHEMATC