AT&T 3B2/300 Technical Reference Manual page 621

- - - - - - - - - - - - - - - - - Appendix: CONNECTOR AND CABLING INFORMATION
464-PIN BACKPLANE CONNECTOR, J02 (Contd)
PIN DESCRIPTION FUNCTION
440* UBUS CACHE ABLE (CABLE[O]) PRUS DATA ACKNOWLEDGE INPUT /OUTPUT OUTPUT
(UDTACK[OJ)
441*
UBUS EARLY PHYSICAL ADDRESS PRUS PHYSICAL ADDRESS STROBE OUTPUT INPUT
STROBE (EPAS[O])
(UPAS{O})
442*
UBUS VIRTUAL ADDRESS STROBE NOT USED OUTPUT NC
(VAS[O])
443*
UBUS ACCESS STATUS BIT 1 (SASl[l]) PRUS CARD SELECT SLOT 1 (UPCSl{OJ) OUTPUT OUTPUT
444* UBUS ACCESS STATUS BIT O (SASO[l]) PRUS SLOT
3
OUTPUT ENABLE
OUTPUT OUTPUT
(C3ALOE[O])
445*
UBUS DATA SIZE BIT O (CDSIZEO[l]) PRUS DATA SIZE BIT O (UDSIZEO[l)) OUTPUT INPUT
446* UBUS SYNCHRONOUS READY (SRDY[O]) PRUS SLOT 2 MEMORY REQUEST INPUT INPUT
(CPU2MEM{O])
447 +5v (VCC) POWER
448* UBUS CYCLE INITIATE (CYCLEI[O]) PRUS SLOT 2 OUTPUT ENABLE OUTPUT
OUTPUT
(C2ALOE[O])
449* BUB CONNECTOR CHIP SELECT 3 PRUS SLOT 1 OUTPUT ENABLE
OUTPUT OUTPUT
(BCCS3[0]) (ClALOE[O])
450 GROUND (GRD)
GROUND
451* UBUS DATA READY (DRDY[O]) NOT USED OUTPUT
NC
452* RECEIVED FAILURE (RFAIL[O]) PRUS SLOT 1 MEMORY REQUEST INPUT INPUT
(CPUlMEM[OJ)
453 UBUS CHIP SELECT (CSl[O]) PULLED UP OUTPUT OUTPUT
454•
UBUS FAULT (FLT[O]) PRUS FAULT (UFLT{OJ) INPUT OUTPUT
455 ABORT PUSH BUTTON (ABUTTN[O]) INPUT
456* UBUS DATA SIZE BIT 1 (CDSIZEl[l])
PRUS DATA SIZE BIT 1 (UDSIZE1{1})
OUTPUT INPUT
457•
UBUS DATA SHADOW (DSHAD[O]) NOT USED OUTPUT NC
458 GROUND (GRD) GROUND
459•
UBUS READ/WRITE (CRlW[O])
PRUS READ/WRITE (URlW[O])
OUTPUT INPUT
460* UBUS DATA STROBE (DS[O]) NOT USED
OUTPUT NC
461 POWER LED (GLED(O]) OUTPUT
462
+sv (VCCJ
POWER
463
DIAGNOSTIC LED (ERLED(O])
OUTPUT
464 +3.6V (VBAT) INPUT
• CM5 l 8C System Board signal description shown in italics.
LEGEND:
NC No Connection
CONNECTOR AND CABLING INFORMATION B-39