參數(shù)資料
型號: ADT7470ARQZ
廠商: ANALOG DEVICES INC
元件分類: 溫度/濕度傳感器
英文描述: DIGITAL TEMP SENSOR-SERIAL, 7BIT(s), RECTANGULAR, SURFACE MOUNT
封裝: ROHS COMPLIANT, MO-137AB, QSOP-16
文件頁數(shù): 27/40頁
文件大小: 962K
代理商: ADT7470ARQZ
ADT7470
Rev. C | Page 33 of
40
Table 36. Register 0x58 to Register 0x67. Fan Tachometer Limit Registers.
Register Address
Read/Write
Description
Power-On Default
0x58
Read/Write
Tach 1 min low byte
0xFF
0x59
Read/Write
Tach 1 min high byte
0xFF
0x5A
Read/Write
Tach 2 min low byte
0xFF
0x5B
Read/Write
Tach 2 min high byte
0xFF
0x5C
Read/Write
Tach 3 min low byte
0xFF
0x5D
Read/Write
Tach 3 min high byte
0xFF
0x5E
Read/Write
Tach 4 min low byte
0xFF
0x5F
Read/Write
Tach 4 min high byte
0xFF
0x60
Read/Write
Tach 1 max low byte
0x00
0x61
Read/Write
Tach 1 max high byte
0x00
0x62
Read/Write
Tach 2 max low byte
0x00
0x63
Read/Write
Tach 2 max high byte
0x00
0x64
Read/Write
Tach 3 max low byte
0x00
0x65
Read/Write
Tach 3 max high byte
0x00
0x66
Read/Write
Tach 4 max low byte
0x00
0x67
Read/Write
Tach 4 max high byte
0x00
Exceeding any of the tach min limit registers shown in Table 36 by 1 indicates that the fan is running too slowly or has stalled.
The appropriate status bit is set in Interrupt Status Register 2 to indicate the fan failure.
Exceeding any of the tach max limit registers by 1 indicates that the fan is too fast. The appropriate status bit is set in Interrupt Status
Register 2 to indicate the fan failure.
Table 37. Register 0x68. PWM1/PWM2 Configuration Register (Power-On Default = 0x00).
Bit Name
Read/Write
Description
[0]
N/A
Set to 0 (default).
[1]
N/A
Set to 0 (default).
[2]
N/A
Set to 0 (default).
[3]
N/A
Set to 0 (default).
[4] INV2
Read/Write
Setting this bit to 1 inverts the PWM2 output. Default = 0.
[5] INV1
Read/Write
Setting this bit to 1 inverts the PWM1 output. Default = 0.
[6] BHVR2
Read/Write
This bit assigns fan behavior for PWM2 output.
0 = manual fan control mode (PWM duty cycle controlled in software).
1 = automatic fan control mode
[7] BHVR1
Read/Write
This bit assigns fan behavior for PWM1 output.
0 = manual fan control mode (PWM duty cycle controlled in software).
1 = automatic fan control mode.
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