Datasheet

 2010 Microchip Technology Inc. DS21909D-page 19
MCP9800/1/2/3
FIGURE 5-4: Timing Diagram for Writing and Reading from the Configuration Register (See
Section 5.3.2 “Sensor Configuration Register (CONFIG)”).
SDA
A
C
K
1001
A
CONFIG Pointer
0000
A
C
K
S
2
A
1
A
0
12345678 12345678
SCL
0
Address Byte
A
C
K
1001
A
Data
N
A
K
S P
2
A
1
A
0
12345678 12345678
Address Byte
R
PIC18FXXX
PIC18FXXX
PIC18FXXX
W
SDA
SCL
001
01100
000
• Reading the CONFIG Register.
• Writing to the CONFIG Register to change the resolution to 0.0625°C <0110 0000>b.
SDA
A
C
K
1001
A
0000
A
C
K
S
2
A
1
A
0
12345678 12345678
SCL
0
Address Byte
W
PIC18FXXX
PIC18FXXX
MSB Data
A
C
K
P
12345678 1
CONFIG Pointer
PIC18FXXX
001
01100
000
Note: It is not necessary to
select the Register
Pointer if it was set
from the previous read/
write
(see Section 4.1.1).