LM75 ON Semiconductor, LM75 Datasheet - Page 6

• Manufacturer Part Number: LM75
• Description: 2-Wire Serial Temperature Sensor and Monitor
• Manufacturer: ON Semiconductor

Master
Master
Master
Master
Master
Master
Start
Start
Start
Start
Start
Start
(a) Typical 2–Byte Read From Preset Pointer Location Such as Temp, T OS , T HYST
(b) Typical Pointer Set Followed by Immediate Read for 2–Byte Register Such as Temp, T OS , T HYST
(c) Typical 1–Byte Read From Configuration Register With Preset Pointer
(d) Typical Pointer Set Followed by Immediate Read from Configuration Register
(e) Configuration Register Write
(f) T OS and T HYST Write
by
by
by
by
by
by
1
1
1
1
1
1
1
1
1
1
1
1
Repeat
Master
0
0
0
0
0
0
Start
by
Address Byte
Address Byte
Address Byte
Address Byte
Address Byte
Address Byte
0
0
0
0
0
0
1 A2 A1 A0
1 A2 A1 A0
1 A2 A1 A0
1 A2 A1 A0
1 A2 A1 A0
1 A2 A1 A0
1
1
0
Address Byte
0
1 A2 A1 A0
R/W
R/W
R/W
R/W
R/W
R/W
LM75
LM75
LM75
LM75
LM75
LM75
Ack
Ack
Ack
Ack
Ack
Ack
by
by
by
by
9
by
by
9
9
9
9
9
D7 D6 D5 D4 D3 D2 D1 D0
D7 D6 D5 D4
1
1
1
0
1
0
0
0
1
1
Most Significant Data Byte
R/W
0
0
0
0
LM75
Ack
0
Pointer Byte
by
Pointer Byte
Pointer Byte
Pointer Byte
9
0
0
0
Data Byte
D7 D6 D5 D4 D3 D2 D1 D0
0
0
0
0
1
Figure 2. Serial Port Operation
Most Significant Data Byte
D3 D2 D1 D0
0
0
0
0
0
0
0 D1 D0
0
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D1 D0
D1 D0
0
D0
LM75
Master
Ack
LM75
LM75
LM75
by
Ack
Ack
Ack
Ack
by
9
by
by
9
9
by
9
No Ack
Master
LM75
9
9
by
Repeat
Master
D7 D6 D5
6
D7 D6 D5 D4 D3 D2 D1 D0
Start
1
1
0
1
.....
.....
by
Least Significant Data Byte
Most Significant Data Byte
Master
1
1
Cond
0
Stop
Configuration Byte
by
Master
Ack
9
by
0
0
D4 D3 D2 D1 D0
Address Byte
D4 D3 D2 D1 D0
D7 D6 D5 D4 D3 D2 D1 D0
0
1
Least Significant Data Byte
1 A2 A1 A0
LM75
LM75
R/W
Ack
No Ack
Ack
Master
by
9
by
9
9 1
LM75
by
Ack
by
D7 D6 D5
9
Master
Cond
Least Significant Data Byte
Stop
D7 D6 D5 D4 D3 D2 D1 D0
by
Master
1
Cond
Stop
by
No Ack
Master
9
by
D4 D3 D2 D1 D0
Data Byte
Master
Cond
Stop
by
LM75
9
Ack
by
No Ack
Master
9
by
Master
Cond
Stop
by
Master
Cond
Stop
by