ADT7476 Analog Devices, Inc., ADT7476 Datasheet - Page 56

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

ADT7476
Address R/W Description
0x7D
0x7E
0x7F
Table 19. Register 0x10—Configuration Register 6 (Power-On Default = 0x00)
Bit
[0]
[1]
[2]
[3]
[4]
[5]
[6]
[7]
1
2
Table 20. Register 0x11—Configuration Register 7 (Power-On Default = 0x00)
Bit
[0]
[7:1]
1
Table 21. Voltage Reading Registers (Power-On Default = 0x00)
Register Address
0x20
0x21
0x22
0x23
0x24
1
2
3
A THERM event always overrides any fan setting (even when fans are disabled).
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.
If the extended resolution bits of these readings are also being read, the extended resolution registers (0x76, 0x77) must be read first. Once the extended resolution
registers have been read, the associated MSB reading registers are frozen until read. Both the extended resolution registers and the MSB registers are frozen.
If V
V
CC
CCP
(Pin 4) is the supply voltage for the ADT7476.
Name
SlowFan
Remote 1
SlowFan Local
SlowFan
Remote 2
THERM in
Manual
SlaveEn
MasterEn
ExtraSlow
V
Low (Bit 7 of Register 0x40) is set, V
CCP
Name
DisTHERMHys
Reserved
R/W Configuration
R
R
Low
Register 4
Test 1
Test 2
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
N/A
R/W
Read-only
Read-only
Read-only
Read-only
Read-only
Bit 7
BpAtt
12 V
Description
When this bit is set, Fan 1 smoothing times are multiplied ×4 for Remote 1 temperature channel (as defined
in Register 0x62).
When this bit is set, Fan 2 smoothing times are multiplied ×4 for local temperature channel (as defined in
Register 0x63).
When this bit is set, Fan 3 smoothing times are multiplied ×4 for Remote 2 temperature channel (as defined
in Register 0x63).
When this bit is set, THERM is enabled in manual mode.
Setting this bit configures the ADT7476 as a slave for use in fan sync mode.
Setting this bit configures the ADT7476 as a master for use in fan sync mode.
V
V
Status Bit 1 in Status Register 1 is set.
When V
When this bit is set, all fan smoothing times are increased by an additional 39.2%
CCP
CCP
SMBALERT is generated, if enabled.
PROCHOT monitoring is disabled.
Everything is re-enabled once V
PROCHOT monitoring is enabled.
Fans return to their programmed state after a spin-up cycle.
CCP
Low = 1. When the power is supplied from 3.3 V STANDBY and the core voltage (V
Low limit value (Register 0x46), the following occurs:
can control the sleep state of the ADT7476.
CCP
Description
Setting this bit to 1 disables THERM hysteresis.
Reserved. Do not write to these bits.
Bit 6
BpAtt
5 V
increases above the low limit:
Description
Reflects the voltage measurement at the 2.5 V input on Pin 22 (8 MSBs of reading).
Reflects the voltage measurement at the V
Reflects the voltage measurement at the V
Reflects the voltage measurement at the 5 V input on Pin 20 (8 MSBs of reading).
Reflects the voltage measurement at the 12 V input on Pin 21 (8 MSBs of reading).
Bit 5
BpAtt V
CCP
Rev. B | Page 56 of 72
Bit 4
BpAtt
2.5 V
Do not write to these registers
Do not write to these registers
CCP
1
increases above the V
Bit 3
Max/Speed
on THERM
Disable
Bit 2
THERM
1, 2
1
1
CCP
CC
CCP
input on Pin 4 (8 MSBs of reading).
input on Pin 23 (8 MSBs of reading).
low limit.
Bit 1
Pin14Func
Bit 0
Pin14Func
CCP
) drops below its
Default Lockable
0x00
0x00
0x00
3
2
Yes
Yes
Yes