LSI 53C875A - Manual (Page 85)

SCSI Bus Interface Signals 3-9
3.4.2 SCSI Signals
Table 3.9 describes the SCSI signals.
3.4.3 SCSI Control Signals
Table 3.10 describes the SCSI Control signals.
Table 3.9 SCSI Signals
Name PQFP BGA Type Strength Description
SD[15:0] 113, 115–17, 85–87, 89,
102, 103, 105–108, 110,
111 D13, E10, C13, D11, J9,
L13, K11, J10, G10, G9,
F13, F11–9, E12, E11 I/O 48 mA SCSI SCSI Data.
SDP[1:0] 112, 101 F8, G13 I/O 48 mA SCSI SCSI Parity.
Table 3.10 SCSI Control Signals
Name PQFP BGA Type Strength Description
SCD 92 J12 I/O 48 mA SCSI phase line, command/data
SIO 90 K13 I/O 48 mA SCSI phase line, input/output.
SMSG 95 H11 I/O 48 mA SCSI phase line, message.
SREQ 91 J11 I/O 48 mA Data handshake line from target device.
SACK 97 H13 I/O 48 mA Data handshake signal from the initiator device.
SBSY 98 H9 I/O 48 mA SCSI bus arbitration signal, busy.
SATN 100 G12 I/O 48 mA SCSI Attention, the initiator is requesting a message out
phase.
SRST 96 H12 I/O 48 mA SCSI bus reset.
SSEL 94 H10 I/O 48 mA SCSI bus arbitration signal, select device.