ADM1029
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33
CONFIGURATION REGISTERS
Table 16. REGISTER 01H CONFIG REGISTER (POWER-ON DEFAULT 000? 000?)
Bit
Name
R/W
Description
0
Install = ?
R/W
This bit reflects Bit 1 of Register 0x03 (Fans Supported In System).
1
Global INT
mask = 0
R/W
Setting this bit to 1 will disable the INT
output for all interrupt sources.
2
ARA Disable = 0
R/W
Setting this bit to 1 will disable the SMBus Alert Response Address
feature.
3
Perform Free-Wheel Test = 0
R/W
Setting this bit to 1 will initiate the Fan Free-Wheeling Test. While this test
is being performed normal monitoring of fan speeds, temperature and
voltages will be temporarily halted. This bit will automatically reset to 0
once the test is complete which will take about 10 seconds.
4
Start Monitoring = 0
R/W
Set to 1 to start round robin monitoring cycle of voltage temperature and
fan speeds, fault detection, etc. While this bit is 0, all fans will run at Alarm
Speed. This bit is set at power-up; otherwise, if automatic fan speed
control is enabled by Pin 18.
5
Force CFAULT
= 0
R/W
Setting this bit to 1 forces CFAULT
to be asserted (Low).
6
Force INT
= 0
R/W
Setting this bit to 1 forces INT
to be asserted (Polarity depends on Bit 7).
7
INT
Polarity = 0
R/W
Polarity of INT
when asserted. 1 means High and 0 means Low.
NOTE: Question marks on this and following pages indicate bit settings that depend on the state of certain pins on power-up.
Table 17. REGISTER 05H GPIO PRESENT/AIN (POWER-ON DEFAULT 0????111)
Bit
Name
R/W
Description
0
GPIO 0 = 1
R/W
Indicates that GPIO0 is being used. Set to 1 on power-up, but can be
overwritten by software. Setting this bit to 0 means AIN0 is being used.
1
GPIO 1 = 1
R/W
Indicates that GPIO1 is being used. Set to 1 on power-up, but can be
overwritten by software. Setting this bit to 0 means AIN1 is being used.
2
GPIO 2 = 1
R/W
Indicates that GPIO2 is being used. Set to 1 on power-up, but can be
overwritten by software.
3
GPIO 3 = ?
R/W
Indicates that GPIO3 is being used. Setting this bit to 0 means TDM1 is
being used. The ADM1029 can detect on power-up if TDM1 is connected.
If so, this bit is set to 0, otherwise it is set to 1. The default setting can be
overwritten by software.
4
GPIO 4 = ?
R/W
Indicates that GPIO4 is being used. Setting this bit to 0 means TDM1 is
being used. The ADM1029 can detect on power-up if TDM1 is connected.
If so, this bit is set to 0, otherwise it is set to 1. The default setting can be
overwritten by software.
5
GPIO 5 = ?
R/W
Indicates that GPIO5 is being used. Setting this bit to 0 means TDM2 is
being used. The ADM1029 can detect on power-up if TDM2 is connected.
If so, this bit is set to 0, otherwise it is set to 1. The default setting can be
overwritten by software.
6
GPIO 6 = ?
R/W
Indicates that GPIO6 is being used. Setting this bit to 0 means TDM2 is
being used. The ADM1029 can detect on power-up if TDM2 is connected.
If so, this bit is set to 0, otherwise it is set to 1. The default setting can be
overwritten by software.
7
Reserved
R
Unused. Will read back 0.
NOTE: Question marks on this and following pages indicate bit settings that depend on the state of certain pins on power-up.
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