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ADT7473
Table 93. REGISTER 0X7C ? CONFIGURATION REGISTER 5 (ADT7473POWER-ON DEFAULT = 0X00)
Bit No.
<0>
<1>
<2>
<3>
<4>
<5>
<6>
<7>
Mnemonic
TWOS
COMPL
Temp Offset
GPIOD
GPIOP
RES
THERM
Hysteresis
R1 THERM
Local
THERM
R2 THERM
R/W (Note 1)
R/W
?
?
?
R/W
R/W
R/W
R/W
Description
Twos complement = 1, sets the temperature range to twos complement temperature range.
Twos complement = 0, changes the temperature range to Offset 64. When this bit is
changed, the ADT7473/ADT7473 ? 1 interprets all relevant temperature register values as
defined by this bit.
TempOffset = 0 sets offset range to ? 64 ? C at 0.5 ? C resolution.
TempOffset = 1 sets offset range to ? 128 ? C at 1 ? C resolution.
GPIO direction. When GPIO function is enabled, this determines whether the GPIO is an
input (0) or an output (1).
GPIO polarity. When the GPIO function is enabled and is programmed as an output, this bit
determines whether the GPIO is active low (0) or high (1).
Reserved on the ADT7473 On the ADT7473 ? 1:
0 = THERM hysteresis disabled
1 = THERM hysteresis enabled
R1 THERM = 1, THERM temperature limit functionality enabled for Remote 1 temperature
channel ; that is, THERM is bidirectional. R1 THERM = 0, THERM is a timer input only.
THERM can also be disabled on any channel by:
Writing ? 64 ? C to the appropriate THERM temperature limit in Offset 64 mode.
Writing ? 128 ? C to the appropriate THERM temperature limit in twos complement mode.
Local THERM = 1, THERM temperature limit functionality enabled for the 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:
Writing ? 64 ? C to the appropriate THERM temperature limit in Offset 64 mode.
Writing ? 128 ? C to the appropriate THERM temperature limit in twos complement mode.
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:
Writing ? 64 ? C to the appropriate THERM temperature limit in Offset 64 mode.
Writing ? 128 ? C to the appropriate THERM temperature limit in twos complement mode.
1. 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.
Table 94. REGISTER 0X7D ? CONFIGURATION REGISTER 4 (POWER-ON DEFAULT = 0X00)
Bit No.
<1:0>
<2>
<3>
Mnemonic
Pin9FUNC
THERM
Disable
Max/Full on
THERM
R/W (Note 1)
R/W
R/W
R/W
Description
These bits set the functionality of Pin 9.
00 = TACH4 (Default)
01 = THERM
10 = SMBALERT
11 = GPIO
THERM Disable = 1, disables THERM overtemperature output features.
Max/Full on THERM = 0; when THERM temperature limit is exceeded, fans go to full speed.
Max/Full on THERM = 1; when THERM temperature limit is exceeded, fans go to maximum
programmed fan speed.
Max/Full on THERM = 1; when THERM limit is exceeded, fans go to maximum speed as
defined in Register 0x38, Register 0x39, Register 0x3A.
<4>
RES
THERM
Config
Unused on ADT7473. On the ADT7473 ? 1:
0 = Remote Channel 2 (Default)
1 = Remote Channel 1 and Remote Channel 2
<5>
<6>
<7>
BpAttV CCP
RES
RES
R/W
Bypass V CCP attenuator. When set, the measurement scale for this channel changes from
0 V (0x00) to 2.2965 V (0xFF).
Reserved
Reserved
1. 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.
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