adt7476a Analog Devices, Inc., adt7476a Datasheet - Page 65

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

Table 46. Register 0x73—Configuration Register 2 (Power-On Default = 0x00)
Bit
0
1
2
3
4
5
6
7
1
Table 47. Register 0x74—Interrupt Mask Register 1 (Power-On Default [7:0] = 0x00)
Bit
0
1
2
3
4
5
6
7
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
2.5V/THERM
V
V
5 V
R1T
LT
R2T
OOL
CCP
CC
Name
FanPresenceDT
Fan1Detect
Fan2Detect
Fan3Detect
AVG
ATTN
CONV
RES
R/W
Read/Write
Read/Write
Read/Write
Read/Write
Read/Write
Read/Write
Read/Write
Read/Write
R/W
Read/Write
Read
Read
Read
Read/Write
Read/Write
Read/Write
1
Description
2.5V/ THERM = 1, masks SMBALERT for out-of-limit conditions on the 2.5 V/ THERM timer channel.
V
V
5 V = 1 masks SMBALERT for out-of-limit conditions on the 5 V channel.
R1T = 1 masks SMBALERT for out-of-limit conditions on the Remote 1 temperature channel.
LT = 1 masks SMBALERT for out-of-limit conditions on the local temperature channel.
R2T = 1 masks SMBALERT for out-of-limit conditions on the Remote 2 temperature channel.
OOL = 0 when one or more alerts are generated in Interrupt Status Register 2, assuming all the
mask bits in the Interrupt Mask Register 2 (0x75) =1, SMBALERT is still asserted.
OOL = 1 when one or more alerts are generated in Interrupt Status Register 2, assuming all the
mask bits in the Interrupt Mask Register 2 (0x75) =1, SMBALERT is not asserted.
CCP
CC
= 1 masks SMBALERT for out-of-limit conditions on the V
= 1 masks SMBALERT for out-of-limit conditions on the V
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 TACH 1 input.
Fan2Detect = 1 indicates that a 4-wire fan is connected to the TACH 2 input.
Fan3Detect = 1 indicates that a 4-wire fan is connected to the TACH 3 input.
AVG = 1 indicates that averaging on the temperature and voltage measurements is
turned off. This allows measurements on each channel to be made much faster. (x16).
ATTN = 1 indicates that the ADT7476A removes the attenuators from the +2.5V
V
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 indicates that the ADT7476A is put into a single-channel ADC conversion
mode. In this mode, the ADT7476A 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 TACH1 minimum high byte register (0x55).
Bits [7:5] Register 0x55
000
001
010
011
100
101
110
111
This bit is reserved and should not be changed.
CCP
Rev. 0 | Page 65 of 72
, +5V
IN
, and +12V
2.5 V
V
V
5 V
12 V
Remote 1 temperature
Local temperature
Remote 2 temperature
CCP
CC
(3.3 V)
IN
inputs. These inputs can be used for other functions such as
1
CC
CCP
channel.
channel.
ADT7476A
IN
,