參數(shù)資料
型號(hào)： ADT7476ARQZ-REEL7
廠商： ANALOG DEVICES INC
元件分類： 溫度/濕度傳感器
英文描述： DIGITAL TEMP SENSOR-SERIAL, 10BIT(s), 2.50Cel, RECTANGULAR, SURFACE MOUNT
封裝： ROHS COMPLIANT, MO-137AE, QSOP-24
文件頁(yè)數(shù)： 68/72頁(yè)
文件大?。?/td> 5219K
代理商： ADT7476ARQZ-REEL7
ADT7476
Rev. B | Page 70 of 72
Table 57. Register 0x7B—TACH Pulses per Revolution Register (Power-On Default = 0x55)
Bit
Name
R/W
Description
[1:0]
FAN1
R/W
Sets number of pulses to be counted when measuring Fan 1 speed. Can be used to determine fan
pulses per revolution for unknown fan type.
Pulses Counted
00 = 1
01 = 2 (default)
10 = 3
11 = 4
[3:2]
FAN2
R/W
Sets number of pulses to be counted when measuring Fan 2 speed. Can be used to determine fan
pulses per revolution for unknown fan type.
Pulses Counted
00 = 1
01 = 2 (default)
10 = 3
11 = 4
[5:4]
FAN3
R/W
Sets number of pulses to be counted when measuring Fan 3 speed. Can be used to determine fan
pulses per revolution for unknown fan type.
Pulses Counted
00 = 1
01 = 2 (default)
10 = 3
11 = 4
[7:6]
FAN4
R/W
Sets number of pulses to be counted when measuring Fan 4 speed. Can be used to determine fan
pulses per revolution for unknown fan type.
Pulses Counted
00 = 1
01 = 2 (default)
10 = 3
11 = 4
Table 58. Register 0x7C—Configuration Register 5 (Power-On Default = 0x01)
Bit
Name
Description
[0]
TWOS
COMPL
R/W
TWOS COMPL = 1, sets the temperature range to the twos complement temperature range.
TWOS COMPL = 0, changes the temperature range to the Offset 64 temperature range. When this bit
is changed, the ADT7476 interprets all relevant temperature register values as defined by this bit.
[1]
Temp Offset
R/W
TempOffset = 0, sets offset range to 63°C to +64°C with 0.5°C resolution.
TempOffset = 1, sets offset range to 63°C to +127°C with 1°C resolution.
These settings apply to registers 0x70, 0x71, and 0x72 (Remote 1, internal, and Remote 2 temperature
offset registers.
[2]
GPIO6D
R/W
GPIO6 direction. When GPIO6 function is enabled, this determines whether GPIO6 is an input (0) or an
output (1).
[3]
GPIO6P
R/W
GPIO6 polarity. When the GPIO6 function is enabled and is programmed as an output, this bit
determines whether the GPIO6 is active low (0) or high (1).
[4]
VID/GPIO
R/W
VID/GPIO = 0, VID functionality is enabled on Pin 5, Pin 6, Pin 7, Pin 8, and Pin 19.
VID/GPIO = 1, GPIO functionality is enabled on Pin 5, Pin 6, Pin 7, Pin 8, and Pin 19.
[5]
R1 THERM
Output only
R/W
R1 THERM = 1 , THERM temperature limit functionality is 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:
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.
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