PRELIMINARY
PCT1789W DATA SHEET
PCT789T-A PCI CONFIGURATION REGISTERS
!!
Subsystem ID / Subsystem Vendor ID
(2Ch, R)
SSYID[15:0]
31
30
29
28
27
26
25
9
24
23
22
6
21
5
20
4
19
3
18
2
17
1
16
SSVID[15:0]
15
14
13
12
11
10
8
7
0
Bit Definitions:
Bits Name
31:16
Description
SSYID[15:0]
SSVID[15:0]
Subsystem ID (R: default 0001h). Allows add-in card or subsystem vendors to
put their product ID in this field. During normal operation, this register is read-
only. However, a new value can be downloaded into this field during power-up
through external serial EEPROM if it is available and valid. In addition, a write-
enable bit for this register is defined in bit 11 of local control register 6 which can
be used by the BIOS to overwrite this register for the desired subsystem ID
before the OS being loaded.
15:0
Subsystem vendor ID (R: default 134Dh). Allows add-in card or subsystem ven-
dors to put their unique ID in this field. During normal operation, this register is
read-only. However, the content of this register can be changed in several ways:
• The PCT789T-A checks the availability of the external serial EEPROM during the
power-up reset period and if the data is valid, loads the configuration information
into the corresponding registers.
• A write-enable bit for this register is defined in bit 1 of local control register 6, which
can be used by the BIOS to overwrite this register for the desired subsystem
vendor ID before the OS being loaded.
* Contact your PC-TEL representative for more information on subsystem
vendor ID codes.
PRELIMINARY
PC-TEL, Inc.
32
1789W0DOCDAT06A-0299
ETC [ ETC ]
