AT&T 3B2/300 Technical Reference Manual page 684

Appendix: CONNECTOR AND CABLING I N F O R M A T I O N - - - - - - - - - - - - - - - - -
120-PIN BUFFERED MICROBUS (BUB) EDGE CONNECTIONS (Contd)
PIN DESCRIPTION
FUNCTION
(From Svstem Board)
057 BUB ADDRESS BIT 26 (BA26[1]) INPUT/OUTPUT
058 BUB ADDRESS BIT 25 (BA25[1]) INPUT /OUTPUT
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 (BAlS[l]) 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 +SV (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 BUB BUSY (BUSY[O]) INPUT/OUTPUT
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 (BAOS[l]) 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 +sv (VCC)
POWER
095 BUB ADDRESS BIT 00 (BAOO[l])
INPUT /OUTPUT
096
BUB ADDRESS PARITY BIT O (BAPO[l]) INPUT/OUTPUT
097
BUB ADDRESS PARITY BIT 2 (BAP2[1]) INPUT /OUTPUT
098 BUB ADDRESS PARITY BIT 1 (BAPl[l]) INPUT/OUTPUT
099
GROUND (GRD) GROUND
100
BUB ADDRESS PARITY BIT 3 (BAP3[1]) INPUT /OUTPUT
101 BUB READ/WRITE (BRlWO) INPUT /OUTPUT
102 +sv (VCC)
POWER
103
BUB CONNECTOR CHIP SELECT O (BCCSO[O]) OUTPUT
104
GROUND (GRD) GROUND
105
BUB DATA SIZE BIT O (BDSIZEO[l])
INPUT /OUTPUT
106 BUB DATA SIZE BIT 1 (BDSIZEl[l])
INPUT /OUTPUT
107
BUB SEQUENTIAL ACCESS (BSEQACC[O]) INPUT
108
BUB PERIPHERAL PARITY (BPCHECK[O]) INPUT
109
BUB BUS REQUEST (BUBRQ[O])
INPUT
110
SANITY TIMER TIMEOUT (SANT[O])
OUTPUT
111 +sv cvcq
POWER
112
BUB FAULT (BFLT[O]) INPUT /OUTPUT
113
BUB GRANTED SLOT (BUBGT[O])
OUTPUT
114
BUB BYPASS MODE ACCESS (BYPASS[O])
OUTPUT
115
BUB DATA STROBE (BDS[O])
INPUT/OUTPUT
116
BUB ADDRESS STROBE (BAS[O])
INPUT /OUTPUT
117
BUB DATA ACKNOWLEDGE (BDTCK[O])
INPUT /OUTPUT
118
GROUND (GRD)
GROUND
119
NOT USED (BSPAREl)
INPUT /OUTPUT
120
NOT USED (BSPARE2)
INPUT /OUTPUT
B-102 TECHNICAL REFERENCE MANUAL