AT&T 3B2/300 Technical Reference Manual page 688

Appendix: CONNECTOR AND CABLING I N F O R M A T I O N - - - - - - - - - - - - - - - -
120-PIN PROCESSING BUS (PBUS) EDGE CONNECTIONS (Contd)
PIN DESCRIPTION
FUNCTION
(From System Board)
059
BUB ADDRESS BIT 24 (BA24[1])
INPUT/OUTPUT
060 BUB ADDRESS BIT 23 (BA23[1])
INPUT /OUTPUT
061 BUB ADDRESS BIT 22 (BA22[1])
INPUT/OUTPUT
062 BUB ADDRESS BIT 21 (BA21[1])
INPUT /OUTPUT
063
GROUND (GRD)
GROUND
064 BUB ADDRESS BIT 20 (BA20[1])
INPUT /OUTPUT
065 BUB ADDRESS BIT 12 (BA12[1]) INPUT /OUTPUT
066
BUB ADDRESS BIT 19 (BA19[1])
INPUT /OUTPUT
067 BUB ADDRESS BIT 18 (BA18[1]) INPUT /OUTPUT
068
BUB ADDRESS BIT 17 (BA17[1])
INPUT /OUTPUT
069 BUB ADDRESS BIT 16 (BA16[1])
INPUT /OUTPUT
070
GROUND (GRD)
GROUND
071 BUB ADDRESS BIT 15 (BA15[1])
INPUT /OUTPUT
072 BUB ADDRESS BIT 14 (BA14[1]) INPUT /OUTPUT
073 GROUND (GRD) GROUND
074 BUB ADDRESS BIT 13 (BA13[1]) INPUT /OUTPUT
075 +5V (VCC) POWER
076 SYSTEM RESET (SYSRST[O]) OUTPUT
077 REQUEST SYSTEM RESET (RQRST[O]) INPUT
078 BUB ADDRESS BIT 27 (BA27[1]) INPUT /OUTPUT
079 PBUS INTERLOCK (UINTLK[O]) INPUT
080 GROUND (GRD) GROUND
081 BUB ADDRESS BIT 11 (BAll[l]) INPUT /OUTPUT
082 BUB ADDRESS BIT 10 (BAlO[l]) INPUT /OUTPUT
083 BUB ADDRESS BIT 09 (BA09[1]) INPUT /OUTPUT
084 BUB ADDRESS BIT 08 (BA08[1])
INPUT /OUTPUT
085 BUB ADDRESS BIT 07 (BA07[1]) INPUT /OUTPUT
086
BUB ADDRESS BIT 06 (BA06[1])
INPUT /OUTPUT
087 GROUND (GRD) GROUND
088
BUB ADDRESS BIT 05 (BA05[1])
INPUT /OUTPUT
089 GROUND (GRD) GROUND
090
BUB ADDRESS BIT 04 (BA04[1])
INPUT /OUTPUT
091 BUB ADDRESS BIT 03 (BA03[1]) INPUT /OUTPUT
092
BUB ADDRESS BIT 02 (BA02[1])
INPUT /OUTPUT
093 BUB ADDRESS BIT 01 (BAOl[l]) INPUT /OUTPUT
094
+5V (VCC) POWER
095
BUB ADDRESS BIT 00 (BAOO[l])
INPUT /OUTPUT
096
NOT USED NC
097 NOT USED NC
098 NOT USED NC
099 GROUND (GRD) GROUND
100
NOT USED NC
101 PBUS READ/WRITE (URlWO) INPUT
102 +5v (VCC)
POWER
103 PBUS CONNECTOR CHIP SELECT (UPCS[O]) OUTPUT
104
GROUND (GRD) GROUND
105 PBUS DATA SIZE BIT O (UDSIZEO[l]) INPUT /OUTPUT
106 PBUS DATA SIZE BIT 1 (UDSIZEl[l]) INPUT /OUTPUT
107
PBUS ADDRESS STROBE (UAS[O]) INPUT
108
BUB PERIPHERAL PARITY (BPCHECK[O]) INPUT
109
PBUS MEMORY ACCESS (CPUMEM[O]) INPUT
110
CPU LATCH (CPUL TCH[l]) OUTPUT
111 +5V (VCC)
POWER
112 PBUS FAULT (UFLT[O])
OUTPUT
113
PBUS OUTPUT ENABLE (CBALOE[O]) OUTPUT
114 PBUS DAT A ACKNOWLEDGE (UDTCK[O])
OUTPUT
115
PBUS DATA STROBE (BDS[O]) INPUT /OUTPUT
116 BUB ADDRESS STROBE (BAS[O]) OUTPUT
117
BUB DATA ACKNOWLEDGE (BDTCK[O]) INPUT
118
GROUND (GRD) GROUND
119 NOT USED
NC
120
NOT USED NC
LEGEND:
NC No Connection
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