adt7476a Analog Devices, Inc., adt7476a Datasheet - Page 58

• Manufacturer Part Number: adt7476a
• Description: Dbcool Remote Thermal Controller And Voltage Monitor
• Manufacturer: Analog Devices, Inc.

ADT7476A
Table 31. Temperature Limit Registers
Register Address
0x4E
0x4F
0x50
0x51
0x52
0x53
1
2
Table 32. Fan TACH Limit Registers
Register Address
0x54
0x55
0x56
0x57
0x58
0x59
0x5A
0x5B
1
Table 33. Register 0x55—TACH1 Minimum High Byte (Power-On Default = 0xFF)
Bits
[4:0]
[7:5]
Exceeding any of these temperature limits by 1°C causes the appropriate status bit to be set in the interrupt status register. Setting the Configuration Register 1 lock
bit has no effect on these registers.
High limits: An interrupt is generated when a value exceeds its high limit (> comparison). Low limits: An interrupt is generated when a value is equal to or below its low
Exceeding any of the TACH limit registers by 1 indicates that the fan is running too slowly or has stalled. The appropriate status bit is set in Interrupt Status Register 2
to indicate the fan failure. Setting the Configuration Register 1 lock bit has no effect on these registers.
limit (≤ comparison).
Name
Reserved
SCADC
R/W
Read-only
Read/Write
R/W
Read/Write
Read/Write
Read/Write
Read/Write
Read/Write
Read/Write
Read/Write
Read/Write
R/W
Read/Write
Read/Write
Read/Write
Read/Write
Read/Write
Read/Write
Description
When Bit 6 of Configuration 2 Register (0x73) is set (single-channel ADC mode), these bits are reserved.
Otherwise, these bits represent Bits [4:0] of the TACH1 minimum high byte.
When Bit 6 of Configuration 2 Register (0x73) is set (single-channel ADC mode), these bits are used to
select the only channel from which the ADC will take measurements. Otherwise, these bits represent Bits
[7:5] of the TACH1 minimum high byte.
1
Description
TACH1 minimum low byte.
TACH1 minimum high byte/single-channel ADC channel select.
TACH2 minimum low byte.
TACH2 minimum high byte.
TACH3 minimum low byte.
TACH3 minimum high byte.
TACH4 minimum low byte.
TACH4 minimum high byte.
1
Description
Remote 1 temperature low limit.
Remote 1 temperature high limit.
Local temperature low limit.
Local temperature high limit.
Remote 2 temperature low limit.
Remote 2 temperature high limit.
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2
Power-On Default
0x81
0x7F
0x81
0x7F
0x81
0x7F
Power-On Default
0xFF
0xFF
0xFF
0xFF
0xFF
0xFF
0xFF
0xFF