Feature Integration Technology Inc.
Fintek
F75373
(b) Serial bus read form internal address register followed by the data byte
0
7
8
0
7
8
SCL
SDA
0
1
0
1
1
0
1
R/W
D7
D6
8
D5
D4
D3
D2
D1
D0
Start By
Master
ack
by
373S
ack
by
373S
Frame 1
Frame 2
Serial Bus Address Byte
Internal Index Register Byte
0
1
1
2
3
4
1
5
0
6
7
0
1
2
3
4
5
6
7
8
SCL(Continued)
SDA(Continued)
0
0
1
1
D7
D6
D5
D4
D3
D2
D1
D0
R/W
Stop by
Master
ack
ack
by
by
Frame 3
Serial Bus Byte
Frame 4
Data Byte
373S
373S
Figure 2. Serial Bus read from Internal Address Register followed by the Data Byte
5.3 Temperature Measurement Machine
The temperature data format is 8-bit two-complement for thermal sensor. The 8-bit temperature data can be obtained by reading
through register. The format of the temperature data is show in Table 4-1.
Temperature
8-Bit Digital Output
8-Bit Hex
8-Bit Binary
+125°C
+25°C
+2°C
+1°C
+0°C
-1°C
0111,1101
0001,1001
0000,0010
0000,0001
0000,0000
1111,1111
1111,1110
1110,0111
1100,1110
7Dh
19h
02h
01h
00h
FFh
FEh
E7h
CEh
-2°C
-25°C
-50°C
Table 4-1.
5.3.1 Monitor Temperature from thermistor
The F75373S can connect two thermistors to measure environment temperature or remote temperature. The specification of
thermistor should be considered to (1) β value is 3435K (2) resistor value is 10K ohm at 25°C. In the Figure 4-3, the themistor is
6
V0.25P
FINTEK [ FEATURE INTEGRATION TECHNOLOGY INC. ]
