ADT7475 Analog Devices, Inc., ADT7475 Datasheet - Page 64

• Manufacturer Part Number: ADT7475
• Description: Dbcool Remote Thermal Monitor And Fan Controller
• Manufacturer: Analog Devices, Inc.

ADT7475
Bit
[6]
[7]
1
Table 55. Register 0x7D—Configuration Register 4 (Power-On Default = 0x00)
Bit
[1:0]
[2]
[3]
[4:7]
[5]
[6:7]
1
Table 56. Register 0x7E—Manufacturer’s Test Register 1 (Power-On Default = 0x00)
Bit
[7:0]
Table 57. 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.
This register becomes read-only when the Configuration Register 1 lock bit is set to 1. Any subsequent attempts to write to this register fail.
Name
Reserved
Name
Reserved
Name
Local
THERM
R2 THERM
Name
PIN9FUNC
THERM
Disable
Max/Full
on THERM
RES
BpAttV
RES
CCP
R/W
Read-only
R/W
Read-only
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
1
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 9:
00 = TACH4 (default)
01 = Bidirectional THERM
10 = SMBALERT
11 = GPIO
THERM Disable = 0, THERM overtemperature output is enabled assuming THERM is correctly
configured (Register 0x78, Register 0x7C, and Register 0x7D).
THERM Disable = 1, THERM overtemperature output is disabled on all channels.
THERM can also be disabled on any channel by the following:
In Offset 64 mode, writing −64°C to the appropriate THERM temperature limit
In twos complement mode, writing −128°C to the appropriate THERM temperature limit
Max/Full on THERM = 0. When THERM limit is exceeded, fans go to full speed.
Max/Full on THERM = 1. When THERM limit is exceeded, fans go to maximum speed as defined in
Register 0x38, Register 0x39, and Register 0x3A.
Unused.
Bypass V
2.2965 V (0xFF) .
Unused.
Description
Local THERM = 0, THERM temperature limit functionality enabled for local temperature channel.
THERM can also be disabled on any channel by the following:
In Offset 64 mode, writing −64°C to the appropriate THERM temperature limit.
In twos complement mode, writing −128°C to the appropriate THERM temperature limit.
R2 THERM = 0, THERM temperature limit functionality enabled for Remote 2 temperature channel.
THERM can also be disabled on any channel by the following:
In offset 64 mode, writing −64˚C to the appropriate THERM temperature limit.
In twos complement mode, writing −128˚C to the appropriate THERM temperature limit.
CCP
attenuator. When set, the measurement scale for this channel changes from 0 V (0x00) to
Rev. B | Page 64 of 68