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3.3.4.
Not used by the BIOS.
Silicon ID chip
User EEPROM
3.3.5. Register x94h & x95h
These registers are reserved.
3.3.6. Register x96h: Programmable Watchdog
Not used by the BIOS.
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Register x93h:
Silicon ID Chip Interface, Local I
Bit
7
6
Reset
Read
Write
Used to read the onboard silicon serial number using the Dallas
IDCHIP
Semiconductor one-wire protocol.
Clock and data I
SCL/SDA
Bit
7
6
Reset
0
1
Read
WDEN
WDS2
Write
WDEN
WDS2
When this bit is set, the programmable watchdog is enabled with the
WDEN
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.
2
C, System Monitor Connector Interface
5
4
3
X
1
X
IDCHIP (pin)
RESERVED
IDCHIP (reg.)
2
C link to user EEPROM.
5
4
3
1
1
WDS1
WDS0
WDS1
WDS0
3-7
Software Setups
2
1
0
1
1
SCL (pin)
SDA (pin)
SCL (reg.)
SDA (reg.)
2
1
0
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