MCM64AF32
4MOTOROLA FAST SRAM
PIN DESCRIPTIONS
160–Lead Card Edge Pin Locations Symbol Type Description
21, 22, 23, 24, 28, 29,
102, 103, 104, 106, 108, 109, 110 A5 – A17 Input Address Inputs: These inputs are latched into data RAMs and must
meet setup and hold times. The tag RAM addresses are not latched.
(See Block Diagram).
9, 89 CAA3,
CAA4 Input Cache Address A: Low order address inputs for bursting. Not latched.
16, 97 CAB3,
CAB4 Input Cache Address B: Low order address inputs for bursting. Not latched.
98 CALE Input Address Latch Enable: Active low signal latches A5 – A17.
11, 12, 13, 14, 92, 93, 94, 96 CWE0 –
CWE7 Input Cache Data Write Enable: Active low write signal for data RAMs.
8 TWE Input Tag Write Enable: Active low write signal for tag RAMs.
— CS Input Chip Select: Active low chip enable for tag and data RAMs. Not used.
91 COE Input Cache Output Enable: Asynchronous active low output enable for data
RAMs.
38, 40, 41, 42, 44, 45, 46, 47, 49, 50, 51,
53, 54, 55, 57, 58, 59, 61, 62, 63, 65, 66,
67, 69, 70, 71, 73, 74, 75, 77, 78, 79,
118, 120, 121, 122, 124, 125, 126, 127,
129, 130, 131, 133, 134, 135, 137, 138,
139, 141, 142, 143, 145, 146, 147, 149,
150, 151, 153, 154, 155, 157, 158, 159
DQ0 –
DQ63 I/O Data I/O
2, 3, 4, 5, 82, 83, 84, 85 TIO0 –
TIO7 I/O Tag RAM I/O:
Drives data out during tag compare cycles.
Stores data to tag RAM during tag WRITE cycles.
33, 34, 112, 113, 114 PD0 –
PD4 Presence Detect: See Presence Detect Table.
7, 15, 25, 39, 52, 60, 68, 76 VCC3 Supply Power Supply: 3.3 V ± 5%.
87, 95, 105, 119, 132, 140, 148, 156 VCC5 Supply Power Supply: 5.0 V ± 5%.
1, 10, 19, 27, 35, 37, 43, 48, 56, 64,
72, 80, 81, 90, 99, 107, 115, 117,
123, 128, 136, 144, 152, 160
VSS Supply Ground
6, 17, 18, 20, 26, 30, 31, 32, 36,
86, 88, 100, 101, 111, 116 NC — No Connection: There is no connection to the module.