adt7476a Analog Devices, Inc., adt7476a Datasheet - Page 70

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

ADT7476A
Table 56. Register 0x7D—Configuration Register 4 (Power-On Default = 0x00)
Bit
[1:0]
[2]
[3]
[4]
[5]
[6]
[7]
1
Table 57. Register 0x7E—Manufacturer’s Test Register 1 (Power-On Default = 0x00)
Bit
[7:0]
Table 58. Register 0x7F—Manufacturer’s Test Register 2 (Power-On Default = 0x00)
Bit
[7:0]
This register becomes read-only when the Configuration Register 1 lock bit is set to 1. Any further attempts to write to this register have no effect.
Name
Reserved
Name
Reserved
Name
PIN14FUNC
THERM
Disable
MaxSpeed
on THERM
BpAtt 2.5 V
BpAtt V
BpAtt 5 V
BpAtt 12 V
CCP
R/W
Read-only
R/W
Read-only
R/W
Read/Write
Read/Write
Read/Write
Read/Write
Read/Write
Read/Write
Read/Write
1
Description
Manufacturer’s test register. These bits are reserved for manufacturer’s test purposes and should not
be written to under normal operation.
Description
Manufacturer’s test register. These bits are reserved for manufacturer’s test purposes and should not
be written to under normal operation.
Description
These bits set the functionality of Pin 14:
THERM Disable = 0 enables THERM overtemperature output assuming THERM is correctly configured
(Register 0x78, Register 0x7C, and Register 0x7D).
THERM Disable = 1 disables THERM overtemperature output on all channels.
THERM can also be disabled on any channel by:
MaxSpeed on THERM = 0 indicates that fans go to full speed when THERM temperature limit is exceeded.
MaxSpeed on THERM = 1 indicates that fans go to max speed (0x38, 0x39, 0x3A) when THERM
temperature limit is exceeded.
Bypass 2.5 V attenuator. When set, the measurement scale for this channel changes from 0 V (0x00) to
2.25 V (0xFF).
Bypass V
2.25 V (0xFF).
Bypass 5 V attenuator. When set, the measurement scale for this channel changes from 0 V (0x00) to
2.25 V (0xFF).
Bypass 12 V attenuator. When set, the measurement scale for this channel changes from 0 V (0x00) to
2.25 V (0xFF).
00 = TACH4 (default)
01 = THERM
10 = SMBALERT
11 = GPIO
Writing −64°C to the appropriate THERM temperature limit in Offset 64 mode.
Writing −128°C to the appropriate THERM temperature limit in twos complement mode.
CCP
attenuator. When set, the measurement scale for this channel changes from 0 V (0x00) to
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