AT&T 3B2/300 Technical Reference Manual page 677

- - - - - - - - - - - - - - - - Appendix: CONNECTOR AND CABLING INFORMATION
464-PIN BACKPLANE CONNECTOR, J02 (Contd)
PIN DESCRIPTION
FUNCTION
440* UBUS CACHE ABLE (CABLE[O])
PBUS DATA ACKNOWLEDGE
INPUT /OUTPUT
OUTPUT
(UDTACK{OJ)
441* UBUS EARLY PHYSICAL ADDRESS
PBUS 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]) PBUS CARD SELECT SLOT 1 (UPCSl{OJ) OUTPUT OUTPUT
444• UBUS ACCESS ST A TUS BIT O (SASO[l])
PBUS SLOT 3 OUTPUT ENABLE
OUTPUT OUTPUT
(C3ALOE[OJ)
445•
UBUS DATA SIZE BIT O (CDSIZEO[l]) PBUS DATA SIZE BIT O (UDSIZEO{l]) OUTPUT INPUT
446* UBUS SYNCHRONOUS READY (SRDY[O]) PBUS SLOT 2 MEMORY REQUEST INPUT INPUT
(CPU2MEM{O])
447 +5V (VCC) POWER
448* UBUS CYCLE INITIATE (CYCLEI[O]) PBUS SLOT 2 OUTPUT ENABLE OUTPUT OUTPUT
(C2ALOE[OJ)
449• BUB CONNECTOR CHIP SELECT 3
PBUS SLOT 1 OUTPUT ENABLE OUTPUT OUTPUT
(BCCS3[0])
(ClALOE[OJ)
450 GROUND (GRD) GROUND
451* UBUS DAT A READY (DRDY[O]) NOT USED OUTPUT NC
452* RECEIVED FAILURE (RFAIL[O])
PBUS SLOT 1 MEMORY REQUEST INPUT
INPUT
(CPUlMEM[OJ)
453 UBUS CHIP SELECT (CSl[O])
PULLED UP OUTPUT OUTPUT
454• UBUS FAULT (FLT[O])
PBUS FAULT (UFLT{O])
INPUT OUTPUT
455 ABORT PUSH BUTTON (ABUTTN[O])
INPUT
456* UBUS DATA SIZE BIT 1 (CDSIZEl[l])
PBUS 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]) PBUS READ/WRITE (URlW{OJ) OUTPUT INPUT
460* UBUS DATA STROBE (DS[O]) NOT USED OUTPUT NC
461 POWER LED (GLED[O]) OUTPUT
462 +5V (VCC) POWER
463 DIAGNOSTIC LED (ERLED[O]) OUTPUT
464 +3.6V (VBAT) INPUT
• CM518C System Board signal description shown in italics.
LEGEND:
NC No Connection
CONNECTOR AND CABLING INFORMATION B-95