Analog Devices dBCool ADT7476, Руководство пользователя

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ADT7476
Rev. B | Page 71 of 72
Bit Name R/W
1
Description
[6] Local
THERM
Output only R/W Local THERM = 1 , THERM temperature limit functionality enabled for local temperature channel; that
is, THERM is bidirectional. Local THERM = 0, THERM is a timer input only.
THERM can also be disabled on any channel by:
In Offset 64 mode, writing −64°C to the appropriate THERM temperature limit.
In twos complement mode, writing −128°C to the appropriate THERM temperature limit.
[7] R2 THERM
Output only R/W R2 THERM = 1 , THERM temperature limit functionality enabled for Remote 2 temperature channel,
that is, THERM is bidirectional. R2 THERM = 0, THERM is a timer input only.
THERM can also be disabled on any channel by:
In Offset 64 mode, writing −64°C to the appropriate THERM temperature limit.
In twos complement mode, writing −128°C to the appropriate THERM temperature limit.
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.
Table 59. Register 0x7D—Configuration Register 4 (Power-On Default = 0x00)
Bit Name R/W
1
Description
[1:0] Pin14Func R/W These bits set the functionality of Pin 14.
00 = TACH4 (default)
01 = THERM
10 = SMBALERT
11 = GPIO6
[2] THERM
Disable R/W THERM Disable = 0, THERM overtemperature output is enabled assuming THERM is correctly
configured (Registers 0x78, 0x7C, 0x7D).
THERM Disable = 1, THERM overtemperature output is disabled on all channels.
THERM can also be disabled on any channel by:
In Offset 64 mode, writing −64°C to the appropriate THERM temperature limit.
In twos complement mode, writing −128°C to the appropriate THERM temperature limit.
[3] Max/Speed
on THERM R/W Max/Speed on THERM = 0, fans go to full speed when THERM temperature limit is exceeded.
Max/Speed on THERM = 1, fans go to maximum speed (Register 0x38, Register 0x39, and Register
0x3A) when THERM temperature limit is exceeded.
[4] BpAtt 2.5V R/W Bypass 2.5 V attenuator. When set, the measurement scale for this channel changes from 0 V (0x00) to
2.25 V (0xFF).
[5] BpAtt V
CCP
R/W Bypass V
CCP
attenuator. When set, the measurement scale for this channel changes from 0 V (0x00) to
2.25 V (0xFF).
[6] BpAtt 5V R/W Bypass 5 V attenuator. When set, the measurement scale for this channel changes from 0 V (0x00) to
2.25 V (0xFF).
[7] BpAtt 12V R/W Bypass 12 V attenuator. When set, the measurement scale for this channel changes from 0 V (0x00) to
2.25 V (0xFF).
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.
Table 60. Register 0x7E—Manufacturer’s Test Register 1 (Power-On Default = 0x00)
Bit Name R/W Description
[7:0] Reserved Read-only Manufacturer’s test register. These bits are reserved for manufacturer’s test purposes and should not
be written to under normal operation.
Table 61. Register 0x7F—Manufacturer’s Test Register 2 (Power-On Default = 0x00)
Bit Name R/W Description
[7:0] Reserved Read-only
Manufacturer’s test register. These bits are reserved for manufacturer’s test purposes and should not
be written to under normal operation.
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