ADT7476 Analog Devices, Inc., ADT7476 Datasheet - Page 67

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

Table 47. Local Temperature Offset
Register Address
0x71
1
Table 48. Remote 2 Temperature Offset
Register Address
0x72
1
Table 49. Register 0x73—Configuration Register 2 (Power-On Default = 0x00)
Bit
[0]
[1]
[2]
[3]
[4]
[5]
[6]
[7]
1
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.
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.
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
FanPresenceDT
Fan1Detect
Fan2Detect
Fan3Detect
AVG
ATTN
CONV
Reserved
Bit
[7:0]
Bit
[7:0]
R/W
R/W
Read
Read
Read
R/W
R/W
R/W
1
R/W
R/W
Description
When FanPresenceDT = 1, the state of Bits [3:1] of 0x73 reflects the presence of a 4-wire fan on
the appropriate TACH channel.
Fan1Detect = 1 indicates that a 4-wire fan is connected to the TACH1 input.
Fan2Detect = 1 indicates that a 4-wire fan is connected to the TACH2 input.
Fan3Detect = 1 indicates that a 4-wire fan is connected to the TACH3 input.
AVG = 1, averaging on the temperature and voltage measurements is turned off. This allows
measurements on each channel to be made much faster (x16).
ATTN = 1, the ADT7476 removes the attenuators from the 2.5 V, V
inputs can be used for other functions such as connecting up external sensors. It is also possible
to remove attenuators from individual channels using Bits [7:4] of Configuration Register 4
(0x7D).
CONV = 1, the ADT7476 is put into a single-channel ADC conversion mode. In this mode, the
ADT7476 can be made to read continuously from one input only, for example, Remote 1
temperature. The appropriate ADC channel is selected by writing to Bits [7:5] of TACH 1
minimum high byte register (0x55).
Register 0x55, Bits [7:5]
000
001
010
011
100
101
110
111
This bit is reserved and should not be changed.
1
R/W
R/W
Description
Remote 2 temperature offset.
Allows a temperature offset to be applied automatically to the Remote
2 temperature channel measurement. Bit 1 of Configuration Register 5
(0x7C) determines the range and resolution of this register.
1
Description
Local temperature offset.
Allows a temperature offset to be applied automatically to the
local temperature measurement. Bit 1 of Configuration
Register 5 (0x7C) determines the range and resolution of this
register.
2.5 V
V
V
5 V
12 V
Remote 1 temperature
Local temperature
Remote 2 temperature
Rev. B | Page 67 of 72
CCP
CC
(3.3 V)
CCP
, 5 V, and 12 V inputs. These
Power-On Default
0x00
Power-On Default
0x00
ADT7476