adt7476a Analog Devices, Inc., adt7476a Datasheet - Page 54

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

ADT7476A
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
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
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.
CC
CCP
(Pin 4) is the supply voltage for the ADT7476A.
Low (Bit 7 of 0x40) is set, V
Mnemonic
SlowFan
Remote 1
SlowFan
Local
SlowFan
Remote 2
THERM in
Manual
SlaveEn
MasterEn
V
ExtraSlow
Mnemonic
DisTHERMHys
Reserved
CCP
Low
R/W
Read/Write
Read/Write
Read/Write
Read/Write
Read/Write
Read/Write
Read/Write
Read/Write
R/W
Read/Write
N/A
R/W
Read-only
Read-only
Read-only
Read-only
Read-only
CCP
can control the sleep state of the ADT7476A.
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 ADT7476A as a slave for use in fan sync mode.
Setting this bit configures the ADT7476A as a master for use in fan sync mode.
V
its V
When V
When this bit is set, all fan smoothing times are increased by a further 39.2%
Description
Setting this bit to 1 disables THERM hysteresis.
Reserved. Do not write to these bits.
CCP
Description
Reflects the voltage measurement at the 2.5 V input on Pin 22 (8 MSBs of reading).
Reflects the voltage measurement
Reflects the voltage measurement
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).
Low = 1. When the power is supplied from 3.3 V STANDBY and the core voltage (V
CCP
• Status Bit 1 in Interrupt Status Register 1 is set.
• SMBALERT is generated, if enabled.
• PROCHOT monitoring is disabled.
•
• PROCHOT monitoring is enabled.
• Fans return to their programmed state after a spin-up cycle.
low limit value (Register 0x46), the following occurs:
CCP
Everything is re-enabled once V
increases above the low limit:
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1
2
3
at the V
at the V
CCP
increases above the V
1, 2
1
CCP
CC
input on Pin 4 (8 MSBs of reading).
input on Pin 23 (8 MSBs of reading).
1
.
CCP
low limit.
CCP
) drops below