Avago Technologies LSI53C120 - Manual (Page 35)

Signal Descriptions 3-5
3.1.4 SCSI B Single-ended Interface Pins
Table 3.2 lists the SCSI B side single-ended interface pins associated
with the 128 pin Plastic Quad Flat Pack (PQFP).
Table 3.2 SCSI B Signal Description
SCSI B Pin Type Strength Description
B_SD/(15-0) 95, 97, 98,
99, 67, 68,
69, 71, 84,
85, 87, 88,
89, 90, 92,
93 I/O 48 mA Data (16-bit SCSI bus)
B_SDP/(1-0) 94, 83 I/O 48 mA Data parity bits
B_SCD/ 74 I/O 48 mA Phase line, command/data
B_SIO/ 72 I/O 48 mA Phase line, input/output
B_SMSG/ 77 I/O 48 mA Phase line, message
B_SREQ/ 73 I/O 48 mA Data handshake signal from target device
B_SACK/ 79 I/O 48 mA Data handshake signal from initiator device
B_SBSY/ 80 I/O 48 mA Bus arbitration signal, busy
B_SATN/ 82 I/O 48 mA Attention, the initiator is requesting a message out
phase
B_SSEL/ 76 I/O 48 mA Bus arbitration signal, select device
B_SRST/ 78 I/O 48 mA Bus Reset