AK9752AE Datasheet, PDF (25/36 Pages) Asahi Kasei Microsystems – Ultra-small IR sensor IC with IC

[AK9752]
8). TMP: Measurement data of Temperature Sensor (Read Only Register)
Address Name D7
D6
D5
D4
D3
D2
08H
TMP TMP[7] TMP[6] TMP[5] TMP[4] TMP[3] TMP[2]
09H
TMP TMP[15] TMP[14] TMP[13] TMP[12] TMP[11] TMP[10]
Reset
0
0
0
0
0
0
D1
TMP[1]
TMP[9]
0
D0
TMP[0]
TMP[8]
0
Measurement data of Integrated Temperature Sensor
TMP[7:0]: Lower 8-bit of output data
TMP[15:8]: Upper 8-bit of output data
16-bit data is stored in 2’s compliment format.
Table 13.3. Measurement data of Temperature Sensor
Measurement data of Temperature Sensor [15:0]
2’s compliment
Hex
Decimal
Temperature
Unit
0111 1111 1111 1111
7FFF
32767
90 or more
⁞
⁞
⁞
⁞
0011 0001 0101 0010
3152
12626
50
⁞
⁞
⁞
⁞
0000 0000 0000 0001
0001
1
25.00198
0000 0000 0000 0000
0000
0
25
ºC
1111 1111 1111 1111
FFFF
-1
24.99802
⁞
⁞
⁞
⁞
1001 0011 0111 1110
937E
-27778
-30
⁞
⁞
⁞
⁞
1011 1001 1000 0000
8001
-32767
-40 or less
Indicated value of Temperature Sensor (ºC) =
0.0019837 × Measurement data of Temperature Sensor (Decimal) + 25
9). ST2: Status 2 (Read Only Register)
Address Name D7
D6
D5
D4
D3
D2
D1
D0
0AH
ST2
DOR
Reset
1
1
1
1
1
1
1
0
Note:
ST2 register must be read out after reading out measurement data. Otherwise, measurement data
would not be updated.
DOR: Data Overrun
“0”: Normal State
“1”: Data Overrun
DOR changes to “1” when data skipping happens, and returns to “0” after reading out ST2 register.
016016473-E-00
- 25 -
2017/1