BU9817FV Datasheet, PDF (12/15 Pages) Rohm – 4-channel temperature sensor IC for PCs with I2C BUS interface

Multimedia ICs
Mode settings table 1 / 2
(1) Pointer register (selects which registers will be read from or written to)
D7
D6
D5
D4
D3
D2
D1
D0
0
0
0
0
Channel Select
Register Select
D4 to D7: These bits are used for test mode and must be kept zero for normal operation.
Channel Select
D3
D2
0
0
0
1
1
0
1
1
Channel
Channel 1
Channel 2
Channel 3
Channel 4
Register Select
D1
D0
0
0
0
1
1
0
1
1
Register
ADV Register (Read only) (Power on Reset default)
Configuration Register (Read / Write)
Vdl Register (Read / Write)
Vul Register (Read / Write)
BU9817FV
(2) ADV Register (Read only)
Channel
D7
D6
D5
D4
D3
D2
D1
D0
1 ch
MSB bit6
bit5
bit4
bit3
bit2
bit1
LSB
2 ch
MSB bit6
bit5
bit4
bit3
bit2
bit1
LSB
3 ch
MSB bit6
bit5
bit4
bit3
bit2
bit1
LSB
4 ch
MSB bit6
bit5
bit4
bit3
bit2
bit1
LSB
D0 to D7: Voltage data
The defaults for the power-on-reset and reset modes are 1 for all bits.
(3) Configuration Register (Read / Write)
Channel
D7 D6
D5
D4
D3
D2
1 ch
0
0
Opendrain
Polarity
Opendrain
2 ch
0
0
Interval Interval
Polarity
Mode
Speed ^Reset _Opendrain
3 ch
0
0
Polarity
4 ch
0
0
Opendrain
Polarity
The defaults for the power-on-reset and reset modes are 0 for all bits.
D1
D0
Comp. / Int.
Comp. / Int.
Comp. / Int.
Shutdown
Comp. / Int.