Avago Technologies LSI53C876E - Manual (Page 88)

3-16 Signal Descriptions
Table 3.12 describes the signals for the SCSI Function A Differential
Control Signals group.
Table 3.12 SCSI Function A Differential Control Signals
Name Pin No. Type Strength Description
A_SDIR[15:0]/ 183, 184, 185, 187,
134, 135, 136, 137,
174, 175, 176, 177,
179, 180, 181, 182,
B11, C11, A11,
B10, H19, H18,
G20, G19, A14,
C13, B13, A13,
D12, C12, B12, A12
O 4 mA Driver direction control for SCSI Function A
data lines.
A_SDIRP0/1 173, B14 O 4 mA Driver direction control for SCSI Function A
parity line.
A_BSYDIR 132, H20 O 4 mA Driver enable control for SCSI Function A
SBSY/ signal.
A_SELDIR 128, J20 O 4 mA Driver enable control for SCSI Function A
SSEL/ signal.
A_RSTDIR 130, J18 O 4 mA Driver enable control for SCSI Function A
SRST/ signal.
A_DIFFSENS 125, K19 I N/A SCSI Function A Differential Sense. This
pin detects the presence of an SE device
on a differential system. When external
differential transceivers are used and a
zero is detected on this pin, all SCSI
Function A chip outputs are 3-stated to
avoid damage to the transceivers. Tie this
pin HIGH during SE operation. The normal
value of this pin is 1.
A_IGS 127, K17 O 4 mA SCSI Function A direction control for
initiator driver group.
A_TGS 126, K18 O 4 mA SCSI Function A direction control for target
driver group.