Avago Technologies LSI53C120 - Manual (Page 36)

3-6 Specifications
3.1.5 SCSI B Differential Interface Pins
Table 3.3 lists the High Voltage Differential (HVD) interface pins
associated with the 128-pin Plastic Quad Flat Pack (PQFP).
Table 3.3 SCSI B Differential Signal Description
SCSI B
Differential
Pin Type Strength Description
B_SDIR(15-0) 114, 117, 118,
119, 51, 52, 54,
55, 103, 104,
106, 107, 108,
109, 111, 112 O 4 mA Driver direction control for SCSI data line
B_SDIRP(1-0) 113, 102 O 4 mA Driver direction control for SCSI parity signals
B_CD_DIR 59 O 4 mA Driver direction control for CD/
B_IO_DIR 56 O 4 mA Driver direction control for IO/
B_MSGDIR 61 O 4 mA Driver direction control for MSG/
B_REQDIR 57 O 4 mA Driver direction control for REQ/
B_ACKDIR 64 O 4 mA Driver direction control for ACK/
B_BSYDIR 65 O 4 mA Driver direction control for BSY/
B_ATNDIR 101 O 4 mA Driver direction control for ATN/
B_SELDIR 60 O 4 mA Driver direction control for SEL/
B_RSTDIR 62 O 4 mA Driver direction control for RST/