LM75A_4
?NXP B.V. 2007. All rights reserved.
Product data sheet
Rev. 04 10 July 2007
13 of 24
NXP Semiconductors
LM75A
Digital temperature sensor and thermal watchdog
Fig 8. Write Tos or Thyst register (2-byte data)
002aad036
1 2 3 4 5 6 7 8 9 1 2 3 4 5 6 7 8 9
D7
SDA (cont.)
SCL (cont.)
D6 D5 D4 D3 D2 D1 D0 A D7 D6 D5 D4 D3 D2 D1 D0 A
P
1
S
SDA
SCL
0 0 1 A2 A1 A0 W A 0 0 0 0 0 0 P1 P0 A (next)
(next)
1 2 3 4 5 6 7 8 9 1 2 3 4 5 6 7 8 9
device address
pointer byte
MSByte data
LSByte data
START
write
device
acknowledge
device
acknowledge
STOP
device
acknowledge
device
acknowledge
Fig 9. Read Temp, Tos or Thyst register including pointer byte (2-byte data)
1 2 3 4 5 6 7 8 9
1 2 3 4 5 6 7 8 9 1 2 3 4 5 6 7 8 9
1 2 3 4 5 6 7 8 9
1 0 0 1 A2 A1 A0 R A D7 D6 D5 D4 D3 D2 D1 D0 A' D7 D6 D5 D4 D3 D2 D1 D0 NA P
1 2 3 4 5 6 7 8 9 0
1
S
0 0 1 A2 A1 A0 W A 0 0 0 0 0 0 P1 P0 A
(next)
(next)
SDA
SCL
SDA (cont)
SCL (cont)
RS
002aad037
device address
pointer byte
device address
MSByte from device
LSByte from device
START
RE-START
write
device
acknowledge
device
acknowledge
read
master
acknowledge
master not
acknowledged
device
acknowledge
STOP
Fig 10. Read Temp, Tos or Thyst register with preset pointer (2-byte data)
1 2 3 4 5 6 7 8 9 1 2 3 4 5 6 7 8 9 1 2 3 4 5 6 7 8 9
1
S
0 0 1 A2 A1 A0 R A D7 D6 D5 D4 D3 D2 D1 D0 A' D7 D6 D5 D4 D3 D2 D1 D0 NA P
SDA
SCL
002aad038
device address
MSByte from device
LSByte from device
START
read
master
acknowledge
master not
acknowledged
device
acknowledge
STOP
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