0x3d, Interrupt pin, Min_gnt – Avago Technologies LSI53C896 User Manual
Page 127: Register: 0x3d, Register: 0x3e
PCI Configuration Registers
4-15
Version 3.3
Copyright © 1998–2003 by LSI Logic Corporation. All rights reserved.
Register: 0x3D
Interrupt Pin
Read Only
IP
Interrupt Pin
[7:0]
This register is unique to each SCSI function. It tells
which interrupt pin the device uses. Its value is set to
0x01 for the Function A (INTA/) signal, and 0x02 for the
Function B (INTB/) signal at power-up if MAD[4] is pulled
LOW. The Function B value is set to 0x01 (INTA/) if
MAD[4] is pulled HIGH.
Note:
Refer to
Section 3.7, “MAD Bus Programming,”
for
details.
Register: 0x3E
Min_Gnt
Read Only
MG
Min_Gnt
[7:0]
This register specifies the desired settings for latency
timer values. Min_Gnt specifies how long a burst period
the device needs. The value specified in these registers
is in units of 0.25 microseconds. The LSI53C896 sets this
register to 0x11.
7
0
IP
SCSI Function A
0
0
0
0
0
0
0
1
SCSI Function B if MAD[4] pulled LOW
0
0
0
0
0
0
1
0
SCSI Function B if MAD[4] pulled HIGH
0
0
0
0
0
0
0
1
7
0
MG
0
0
0
1
0
0
0
1