Datasheet

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
123456789123456789
D7SDA (cont.)
SCL (cont.)
D6 D5 D4 D3 D2 D1 D0 A D7 D6 D5 D4 D3 D2 D1 D0 A P
1SSDA
SCL
001A2A1A0WA000000P1P0A
(next)
(next)
123456789123456789
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)
123456789
123456789123456789
123456789
1001A2A1A0RAD7D6D5D4D3D2D1D0A'D7D6D5D4D3D2D1D0NA P
1234567890
1S 001A2A1A0WA 000000P1P0A (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)
123456789123456789123456789
1S 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