ADT7475 Analog Devices, Inc., ADT7475 Datasheet - Page 51

• Manufacturer Part Number: ADT7475
• Description: Dbcool Remote Thermal Monitor And Fan Controller
• Manufacturer: Analog Devices, Inc.

Address
0x7C
0x7D
0x7E
0x7F
Table 16. Register 0x10—Configuration Register 6 (Power-On Default = 0x00)
Bit
[0]
[1]
[2]
[3]
[5:4]
[6]
[7]
1
2
Table 17. Register 0x11—Configuration Register 7 (Power-On Default = 0x00)
Bit
[0]
[7:1]
1
Table 18. Voltage Reading Registers (Power-On Default = 0x00)
Register Address
0x21
0x22
1
2
If the extended resolution bits of these readings are also read, the extended resolution registers (Reg. 0x76, Reg. 0x77) must be read first. Once the extended resolution
V
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.
registers are read, the associated MSB reading registers are frozen until read. Both the extended resolution registers and the MSB registers are frozen.
CC
(Pin 3) is the supply voltage for the ADT7475.
Name
SLOW Remote 1
SLOW Local
SLOW Remote 2
THERM in Manual
Reserved
V
ExtraSlow
R/W
R/W
R/W
R
R
CCP
Low
Reserved
Name
DisTHERMHys
Configuration
Register 5
Configuration
Register 4
Test Register 2
Description
Test Register 1
Bit 7
R2
THERM
O/P Only
RES
R/W
N/A
R/W
Read-only
Read-only
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
N/A
Bit 6
Local
THERM
O/P Only
RES
Bit 5
R1
THERM
O/P
Only
BpAtt
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,
Reserved. Do not write to these bits.
V
(V
•
•
•
•
•
Description
Reflects the voltage measurement at the V
Reflects the voltage measurement at the V
When this bit is set, all fan smoothing times are increased by a further 39.2%.
CCP
CCP
CCP
LO = 1. When the power is supplied from 3.3 V STANDBY and the core voltage
•
•
) drops below its V
Bit 1 in Interrupt Status Register 1 is set.
SMBALERT is generated, if enabled.
PROCHOT monitoring is disabled.
Everything is re-enabled once V
When V
Rev. B | Page 51 of 68
Reserved. Do not write to these bits
Description
Setting this bit to 1 disables
Do not write to these registers
Do not write to these registers
PROCHOT monitoring is enabled.
Fans return to their programmed state after a spin-up cycle.
Bit 4
RES
RES
CCP
1, 2
increases above the low limit:
Bit 3
GPIOP
Max/Full
on
THERM
THERM
CCP
low limit value (Register 0x46), the following occurs:
is enabled in manual mode.
1, 2
1
Bit 2
GPIOD
THERM
Disable
THERM
CCP
increases above the V
Bit 1
Temp
Offset
PIN9
FUNC
hysteresis.
CCP
CC
input on Pin 3 (8 MSBs of reading).
input on Pin 14 (8 MSBs of reading).
Bit 0
TWOS
COMPL
PIN9FUNC
1
CCP
low limit.
Default
0x01
0x00
0x00
0x00
ADT7475
Lockable
Yes
Yes
Yes
Yes
2
1