Datasheet

 2010 Microchip Technology Inc. DS21909D-page 21
MCP9800/1/2/3
FIGURE 5-5: Timing Diagram for Writing and Reading from the Temperature Hysteresis Register
(See Section 5.3.3 “Temperature Hysteresis Register (T
HYST
)”).
SDA
A
C
K
1001
A
0000
A
C
K
S
2
A
1
A
0
12345678 12345678
SCL
0
Address Byte
A
C
K
1001
A
MSB Data
A
C
K
N
A
K
S P
2
A
1
A
0
12345678 12345678 12345678
Address Byte
LSB Data
R
PIC18FXXX
PIC18FXXX
PIC18FXXX
Master
Master
W
SDA
SCL
010
01011
111 00000
000
• Reading the T
HYST
Register.
• Writing to the T
HYST
Register to set the temperature hysteresis to 95°C <0101 1111 0000 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
A
C
K
P
12345678 12345678
LSB Data
T
HYST
Pointer
PIC18FXXX
PIC18FXX
010
01011
111 00000
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).
T
HYST
Pointer