Expansion rom base address, Subsystem id (ssid), 0x30 – Avago Technologies LSI53C825AE User Manual
Page 99: Register: 0x2e, Register: 0x30
Configuration Registers
4-11
Register: 0x2E
Subsystem ID (SSID)
Read Only
SSID
Subsystem ID
[15:0]
This register supports subsystem identification, which
has a default value of 0x1000 in the LSI53C825AE
(
Section 3.2, “MAD Bus Programming”
). To write to this
register, connect a 4.7 k
Ω
resistor between the MAD[6]
pin and V
SS
and leave the MAD[4] pin unconnected. The
MAD[6] and MAD[4] pins have internal pull-up resistors
and are sensed shortly after the deassertion of chip
reset. In revisions before Revision G of the LSI53C825A,
the MAD[6] and MAD[4] pins do not support the SSID
and SSVID configurations, and only values of 0x0000 can
be found in the Subsystem Data register.
Register: 0x30
Expansion ROM Base Address
Read/Write
ERBA
Expansion ROM Base Address
[31:0]
This four-byte register handles the base address and size
information for expansion ROM. It functions exactly like
the
and
registers, except that the encoding of the bits
is different. The upper 21 bits correspond to the upper
21 bits of the expansion ROM base address.
15
0
SSID
LSI53C825AE
1
1
1
1
0
0
0
0
0
0
0
0
0
0
0
0
LSI53C825A
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
31
0
ERBA
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0