Software Setups
3-7
3.3.4.
Register x93h:
Silicon ID Chip Interface, Local I
2
C, System Monitor Connector Interface
Bit
7
6
5
4
3
2
1
0
Reset
X
1
1
1
Read
X
IDCHIP (pin)
SCL (pin)
SDA (pin)
Write
RESERVED
IDCHIP (reg.)
SCL (reg.)
SDA (reg.)
Not used by the BIOS.
Silicon ID chip
IDCHIP
Used to read the onboard silicon serial number using the Dallas
Semiconductor one-wire protocol.
User EEPROM
SCL/SDA
Clock and data I
2
C link to user EEPROM.
3.3.5. Register x94h & x95h
These registers are reserved.
3.3.6. Register x96h: Programmable Watchdog
Bit
7
6
5
4
3
2
1
0
Reset
0
1
1
1
Read
WDEN
WDS2
WDS1
WDS0
Write
WDEN
WDS2
WDS1
WDS0
Not used by the BIOS.
WDEN
When this bit is set, the programmable watchdog is enabled with the
current timeout specified by WDS[2..0] (refer to the dual-stage
programmable watchdog description in Section 5-1).
To avoid accidental deactivation of the watchdog, the bit WDEN is
normally locked by the bit LOCK of register x92h (see register x92h
description).
WDS[2..0]
Timeout selection.
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