ADT7476 Analog Devices, Inc., ADT7476 Datasheet - Page 70

• Manufacturer Part Number: ADT7476
• Description: Dbcool Remote Thermal Controller And Voltage Monitor
• Manufacturer: Analog Devices, Inc.

ADT7476
Table 57. Register 0x7B—TACH Pulses per Revolution Register (Power-On Default = 0x55)
Bit
[1:0]
[3:2]
[5:4]
[7:6]
Table 58. Register 0x7C—Configuration Register 5 (Power-On Default = 0x01)
Bit
[0]
[1]
[2]
[3]
[4]
[5]
Name
FAN1
FAN2
FAN3
FAN4
Name
TWOS
COMPL
Temp Offset
GPIO6D
GPIO6P
VID/GPIO
R1 THERM
Output only
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
1
Description
TWOS COMPL = 1, sets the temperature range to the twos complement temperature range.
TWOS COMPL = 0, changes the temperature range to the Offset 64 temperature range. When this bit
is changed, the ADT7476 interprets all relevant temperature register values as defined by this bit.
TempOffset = 0, sets offset range to −63°C to +64°C with 0.5°C resolution.
TempOffset = 1, sets offset range to −63°C to +127°C with 1°C resolution.
These settings apply to registers 0x70, 0x71, and 0x72 (Remote 1, internal, and Remote 2 temperature
offset registers.
GPIO6 direction. When GPIO6 function is enabled, this determines whether GPIO6 is an input (0) or an
output (1).
GPIO6 polarity. When the GPIO6 function is enabled and is programmed as an output, this bit
determines whether the GPIO6 is active low (0) or high (1).
VID/GPIO = 0, VID functionality is enabled on Pin 5, Pin 6, Pin 7, Pin 8, and Pin 19.
VID/GPIO = 1, GPIO functionality is enabled on Pin 5, Pin 6, Pin 7, Pin 8, and Pin 19.
R1 THERM = 1 , THERM temperature limit functionality is 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:
Description
Sets number of pulses to be counted when measuring Fan 1 speed. Can be used to determine fan
pulses per revolution for unknown fan type.
Pulses Counted
00 = 1
01 = 2 (default)
10 = 3
11 = 4
Sets number of pulses to be counted when measuring Fan 2 speed. Can be used to determine fan
pulses per revolution for unknown fan type.
Pulses Counted
00 = 1
01 = 2 (default)
10 = 3
11 = 4
Sets number of pulses to be counted when measuring Fan 3 speed. Can be used to determine fan
pulses per revolution for unknown fan type.
Pulses Counted
00 = 1
01 = 2 (default)
10 = 3
11 = 4
Sets number of pulses to be counted when measuring Fan 4 speed. Can be used to determine fan
pulses per revolution for unknown fan type.
Pulses Counted
00 = 1
01 = 2 (default)
10 = 3
11 = 4
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.
Rev. B | Page 70 of 72