ADT7473 Analog Devices, Inc., ADT7473 Datasheet - Page 74

• Manufacturer Part Number: ADT7473
• Description: Dbcool Remote Thermal Monitor And Fan Controller
• Manufacturer: Analog Devices, Inc.

ADT7473
Table 57. Register 0x7C—Configuration Register 5 (Power-On Default = 0x00)
Bit
[0]
[1]
[2]
[3]
[4]
[5]
[6]
[7]
1
Table 58. Register 0x7D—Configuration Register 4 (Power-On Default = 0x00)
Bit
[1:0]
[2]
[3]
[4:5]
[6]
[7]
1
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 further attempts to write to this register have no effect.
Name
TWOS
COMPL
TempOffset
GPIOD
GPIOP
RES
R1 THERM
Local
THERM
R2 THERM
Name
Pin9FUNC
THERM
Disable
Max/Full
on THERM
RES
BpAttVCCP
RES
R/W
Read/write
Read/write
Read/write
Read/write
R/W
R/W
R/W
R/W
R/W
1
1
Description
These bits set the functionality of Pin 9:
THERM Disable = 1, disables THERM over temperature feature.
Max/Full on THERM = 0; when THERM temperature limit is exceeded, fans go to full speed.
Max/Full on THERM = 1; when THERM temperature limit is exceeded, fans go to maximum
programmed fan speed.
Max/Full on THERM = 1; when THERM limit is exceeded, fans go to maximum speed as defined in
Register 0x38, Register 0x39, Register 0x3A.
Unused.
Bypass V
2.2965 V (0xFF).
Unused.
Description
Twos complement = 1, sets the temperature range to twos complement temperature range.
Twos complement = 0, changes the temperature range to Offset 64. When this bit is changed, the
ADT7473 interprets all relevant temperature register values as defined by this bit.
TempOffset = 0 sets offset range to ±64°C at 0.5°C resolution.
TempOffset = 1 sets offset range to ±128°C at 1°C resolution.
GPIO direction. When GPIO function is enabled, this determines whether the GPIO is an input (0) or an
output (1).
GPIO polarity. When the GPIO function is enabled and is programmed as an output, this bit
determines whether the GPIO is active low (0) or high (1).
Reserved
R1 THERM = 1, THERM temperature limit functionality enabled for Remote 1 temperature channel;
that is, THERM is bidirectional. R1 THERM = 0, THERM is a timer input only.
THERM can also be disabled on any channel by
•
•
Local THERM = 1, THERM temperature limit functionality enabled for the local temperature channel;
that is, THERM is bidirectional. Local THERM = 0, THERM is a timer input only.
THERM can also be disabled on any channel by
•
•
R2 THERM = 1, THERM temperature limit functionality enabled for Remote 2 temperature channel;
that is, THERM is bidirectional. R2 THERM = 0, THERM is a timer input only.
THERM can also be disabled on any channel by
•
•
00 = TACH4 (default)
11 = GPIO
01 = THERM
10 = SMBALERT
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.
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.
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
Rev. A | Page 74 of 76