AT&T 3B2/300 Technical Reference Manual page 685

- - - - - - - - - - - - - - - - A p p e n d i x : CONNECTOR AND CABLING INFORMATION
II
120-PIN VCACHE EDGE CONNECTIONS
PIN DESCRIPTION
001 UBUS DATA STROBE (DS[O])
002 UBUS READ/WRITE (CRlWO)
003 GROUND (GRD)
004 UBUS DATA SHADOW (DSHAD[O])
005 UBUS DATA SIZE BIT 1 (CDSIZEl[l])
006 UBUS FAULT (FLT[O])
007 UBUS CARD SELECT (CSl[O])
008 GROUND (GRD)
009 UBUS FAILURE (FAIL[O])
010 UBUS DATA READY (DRDY[O])
011 UBUS CYCLE INITIATE (CYCLEI[O])
012 UBUS SYNCHRONOUS READY (SRDY[O])
013 UBUS DATA SIZE BIT O (CDSIZEO[l])
014 UBUS ACCESS STATUS BIT O (SASO[l])
015 +5V (VCC)
016 ACCESS STATUS BIT 1 (SASl[l])
017 UBUS VIRTUAL ADDRESS STROBE (VAS[O])
018 UBUS EARLY PHYSICAL ADDRESS STROBE (EPAS[O])
019 UBUS CACHE ABLE (CABLE[O])
020 GROUND (GRD)
021 UBUS ABORT ACTIVATED (ABORT[O])
022 UBUS DATA ACKNOWLEDGE (DTACK[O])
023 UBUS ACCESS STATUS BIT 2 (SAS2[1])
024 UBUS ACCESS STATUS BIT 3 (SAS3[1])
025 UBUS VIRTUAL ADDRESS (BY CPU) (VAD[O])
026 UBUS COPROCESSOR DONE (DONE[O])
027 GROUND (GRD)
028 UBUS BUS REQUEST (BUSRQ[O])
029 UBUS EXECUTION MODE 1 (XMDl[l])
030 UBUS VIRTUAL CACHE HIT (VCHIT[O])
031 OPERATIONAL INTERRUPT LEVEL 15 (OPINT15[0])
032 +5v (VCC)
033 SANITY TIMER TIMEOUT (SANT[O])
034 UBUS GRANTED (BUSGT[O])
035 +12V (V12P)
036 NOT USED
037 CLOCK 34 (CLK34[1])
038 -12V (V12N)
039 GROUND (GRD)
040 UBUS SEQUENTIAL ACCESS (CSEQACC[O])
041 CLOCK 23 (CLK23[1])
042 SYSTEM RESET (SYSRST[O])
043 NOT USED
044 REQUEST SYSTEM RESET (RQRST[O])
045 UBUS ADDRESS BIT 31 (CA31[1])
046 UBUS ADDRESS BIT 30 (CA30[1])
047 UBUS ADDRESS BIT 29 (CA29[1])
048 UBUS ADDRESS BIT 28 (CA28[1])
049 UBUS ADDRESS BIT 27 (CA27[1])
050 UBUS ADDRESS BIT 26 (CA26[1])
051 GROUND (GRD)
052 UBUS ADDRESS BIT 25 (CA25[1])
053 UBUS ADDRESS BIT 24 (CA24[1])
054 UBUS ADDRESS BIT 23 (CA23[1])
055 UBUS ADDRESS BIT 22 (CA22[1])
056 +5v (VCC)
057 UBUS ADDRESS BIT 21 (CA21[1])
058 UBUS ADDRESS BIT 20 (CA20[1])
II
FUNCTION
(From
VCACHE)
INPUT
INPUT
GROUND
INPUT
INPUT
OUTPUT
INPUT
GROUND
OUTPUT
OUTPUT
INPUT
OUTPUT
INPUT
INPUT
POWER
INPUT
INPUT
INPUT
INPUT
GROUND
INPUT
OUTPUT
INPUT
INPUT
INPUT
OUTPUT
GROUND
OUTPUT
INPUT
OUTPUT
OUTPUT
POWER
INPUT
INPUT
POWER
NC
INPUT
POWER
GROUND
OUTPUT
INPUT
INPUT
NC
OUTPUT
INPUT
INPUT
INPUT
INPUT
INPUT
INPUT
GROUND
INPUT
INPUT
INPUT
INPUT
POWER
INPUT
INPUT
CONNECTOR AND CABLING INFORMATION B-103