Datasheet

Data Sheet ADT7470
Rev. E | Page 27 of 40
REGISTER MAP
Table 23. ADT7470 Register Map
Address R/W Description Default
Lockable
0x20 R Temperature 1 Reading 0x00
0x21 R Temperature 2 Reading 0x00
0x22 R Temperature 3 Reading 0x00
0x23
R
Temperature 4 Reading
0x00
0x24 R Temperature 5 Reading 0x00
0x25 R Temperature 6 Reading 0x00
0x26 R Temperature 7 Reading 0x00
0x27 R Temperature 8 Reading 0x00
0x28 R Temperature 9 Reading 0x00
0x29 R Temperature 10 Reading 0x00
0x2A R Tach 1 Low Byte 0xFF
0x2B R Tach 1 High Byte 0xFF
0x2C
R
Tach 2 Low Byte
0xFF
0x2D R Tach 2 High Byte 0xFF
0x2E R Tach 3 Low Byte 0xFF
0x2F R Tach 3 High Byte 0xFF
0x30 R Tach 4 Low Byte 0xFF
0x31 R Tach 4 High Byte 0xFF
0x32 R/W PWM1 Current Duty Cycle 0xFF
0x33 R/W PWM2 Current Duty Cycle 0xFF
0x34 R/W PWM3 Current Duty Cycle 0xFF
0x35 R/W PWM4 Current Duty Cycle 0xFF
0x36 R Reserved 0x00
0x37 R/W ADI Test Register 1 0x00 y
0x38 R/W PWM1 Max Duty Cycle 0xFF
0x39 R/W PWM2 Max Duty Cycle 0xFF
0x3A R/W PWM3 Max Duty Cycle 0xFF
0x3B R/W PWM4 Max Duty Cycle 0xFF
0x3C R/W ADI Test Register 2 0x00 y
0x3D
R
Device ID Register
0x70
0x3E R Company ID Number 0x41
0x3F R Revision Number 0x02
0x40 R/W Configuration Register 1 0x01
0x41
R
Interrupt Status Register 1
0xXX
0x42 R Interrupt Status Register 2 0xXX
0x43 R/W Fan Pulses per Revolution 0x55
0x44 R/W Temperature 1 Low Limit 0x81
0x45 R/W Temperature 1 High Limit 0x7F
0x46 R/W Temperature 2 Low Limit 0x81
0x47 R/W Temperature 2 High Limit 0x7F
0x48 R/W Temperature 3 Low Limit 0x81
0x49 R/W Temperature 3 High Limit 0x7F
0x4A R/W Temperature 4 Low Limit 0x81
0x4B R/W Temperature 4 High Limit 0x7F
0x4C R/W Temperature 5 Low Limit 0x81
0x4D R/W Temperature 5 High Limit 0x7F
0x4E R/W Temperature 6 Low Limit 0x81
0x4F
R/W
Temperature 6 High Limit
0x7F
0x50 R/W Temperature 7 Low Limit 0x81
0x51 R/W Temperature 7 High Limit 0x7F
0x52 R/W Temperature 8 Low Limit 0x81
0x53 R/W Temperature 8 High Limit 0x7F