参数资料
型号: ADT7470ARQZ
厂商: ANALOG DEVICES INC
元件分类: 温度/湿度传感器
英文描述: DIGITAL TEMP SENSOR-SERIAL, 7BIT(s), RECTANGULAR, SURFACE MOUNT
封装: ROHS COMPLIANT, MO-137AB, QSOP-16
文件页数: 26/40页
文件大小: 962K
代理商: ADT7470ARQZ
ADT7470
Rev. C | Page 32 of
40
Table 34. Register 0x43. Fan Pulses per Revolution Register (Power-On Default = 0x55).
Bit Name
Read/Write
Description
[1:0] Fan 1
Read/Write
Sets the number of pulses to be counted when measuring Fan 1 speed.
Can be used to determine fan’s pulses per revolution number for unknown fan type.
Pulses Counted
00 = 1
01 = 2 (default)
10 = 3
11 = 4
[3:2] Fan 2
Read/Write
Sets the number of pulses to be counted when measuring Fan 2 speed.
Can be used to determine fan’s pulses per revolution number for unknown fan type.
Pulses Counted
00 = 1
01 = 2 (default)
10 = 3
11 = 4
[5:4] Fan 3
Read/Write
Sets the number of pulses to be counted when measuring Fan 3 speed.
Can be used to determine fan’s pulses per revolution for unknown fan type.
Pulses Counted
00 = 1
01 = 2 (default)
10 = 3
11 = 4
[7:6] Fan 4
Read/Write
Sets the number of pulses to be counted when measuring Fan 4 speed. Can be used to determine fan’s
pulses per revolution for unknown fan type.
Pulses Counted
00 = 1
01 = 2 (default)
10 = 3
11 = 4
Table 35. Register 0x44 to Register 0x57. Temperature Limit Registers.
Register Address
Read/Write
Description
Power-On Default
0x44
Read/Write
Temperature 1 low limit
0x81
0x45
Read/Write
Temperature 1 high limit
0x7F
0x46
Read/Write
Temperature 2 low limit
0x81
0x47
Read/Write
Temperature 2 high limit
0x7F
0x48
Read/Write
Temperature 3 low limit
0x81
0x49
Read/Write
Temperature 3 high limit
0x7F
0x4A
Read/Write
Temperature 4 low limit
0x81
0x4B
Read/Write
Temperature 4 high limit
0x7F
0x4C
Read/Write
Temperature 5 low limit
0x81
0x4D
Read/Write
Temperature 5 high limit
0x7F
0x4E
Read/Write
Temperature 6 low limit
0x81
0x4F
Read/Write
Temperature 6 high limit
0x7F
0x50
Read/Write
Temperature 7 low limit
0x81
0x51
Read/Write
Temperature 7 high limit
0x7F
0x52
Read/Write
Temperature 8 low limit
0x81
0x53
Read/Write
Temperature 8 high limit
0x7F
0x54
Read/Write
Temperature 9 low limit
0x81
0x55
Read/Write
Temperature 9 high limit
0x7F
0x56
Read/Write
Temperature 10 low limit
0x81
0x57
Read/Write
Temperature 10 high limit
0x7F
Exceeding any of the temperature limits shown in Table 35 by 1°C causes the appropriate status bit to be set in the interrupt status registers.
High limits: An interrupt is generated when a value exceeds its high limit (> comparison).
Low limits: An interrupt is generated when a value is equal to or below its low limit (≤ comparison).
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