Avago Technologies LSI53C876E - Manual (Page 86)

3-14 Signal Descriptions
3.2.2 SCSI Bus Interface
Table 3.10 describes the signals for the SCSI Function A Signals group.
Table 3.10 SCSI Function A Interface Signals
Name Pin No. Type Strength Description
A_SD[15:0]/,
A_SDP[1:0]/ 167, 169, 170, 171,
139, 140, 141, 143,
156, 157, 159, 160,
161, 162, 164, 165,
166, 155,
C15, D14, B15,
A15, G18, F19,
E20, G17, A20,
A19, B18, B17,
A18, A17, C16,
B16, A16, B19 I/O 48 mA
SCSI
SCSI Function A Data includes the following
data lines and parity signals: A_SD/[15:0]
(16-bit SCSI data bus), and A_SDP/[1:0]
(SCSI data parity bits).
A_SCTRL/ 146, 144, 149, 145,
151, 152, 154, 150,
148,
D20, F18, D19,
E19, E17, C19,
B20, C20, E18 I/O 48 mA
SCSI
SCSI Function A Control includes the
following signals:
A_SC_D/
SCSI phase line, command/data
A_SI_O/ SCSI phase line, input/output
A_SMSG/ SCSI phase line, message
A_SREQ/ Data handshake line from target
device
A_SACK/ Data handshake signal from
initiator device
A_SBSY/ SCSI bus arbitration signal,
busy
A_SATN/ SCSI Attention, the initiator is
requesting a message out
phase
A_SRST/ SCSI bus reset
A_SSEL/ SCSI bus arbitration signal,
select device