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MCP9805-BE/ST

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P21P22-P24P25-P27P28-P30P31-P33P34-P34
MCP9805
DS21977C-page 22 2005-2013 Microchip Technology Inc.
5.2 Timing Diagram
FIGURE 5-2: Read 1-byte
and 2-byte data from a Register.
S = START Condition
P = STOP Condition
SDA
A
C
K
0011
A
Pointer
0000
P
A
C
K
S
2
A
1
A
0
1
P
0
12345678 12345678
SCLK
0
Address Byte
A
C
K
0011
A
N
A
K
S P
2
A
1
A
0
D
7
D
6
D
5
D
4
D
3
D
2
D
1
D
0
12345678 12345678
Address Byte
Data
R
MCP9805
MCP9805
MCP9805
Master
W
SDA
A
C
K
0011
A
Pointer
0000
P
A
C
K
S
2
A
1
A
0
1
P
0
12345678 12345678
SCLK
0
Address Byte
A
C
K
0011
A
MSb Data
A
C
K
N
A
K
S P
2
A
1
A
0
D
7
D
6
D
5
D
4
D
3
D
2
D
1
D
0
12345678 12345678 12345678
Address Byte
LSb Data
R
D
15
D
14
D
13
D
12
D
11
D
10
D
9
D
8
MCP9805
MCP9805
MCP9805
Master
Master
W
SDA
SCLK
SDA
SCLK
Read 1-byte Data
Read 2-byte Data
P
2
P
2
2005-2013 Microchip Technology Inc. DS21977C-page 23
MCP9805
FIGURE 5-3: Write 1-byte and 2-byte data from a Register.
SDA
A
C
K
0011
A
0000
A
C
K
S
2
A
1
A
0
12345678 12345678
SCLK
0
Address Byte
W
MCP9805
MCP9805
P
1
P
0
MSb Data
A
C
K
A
C
K
P
D
7
D
6
D
5
D
4
D
3
D
2
D
1
D
0
12345678 12345678
LSb Data
D
15
D
14
D
13
D
12
D
11
D
10
D
9
D
8
Pointer
S = START Condition
P = STOP Condition
MCP9805
SDA
A
C
K
0011
A
0000
A
C
K
S
2
A
1
A
0
12345678 12345678
SCLK
0
Address Byte
W
MCP9805
MCP9805
P
1
P
0
A
C
K
P
D
7
D
6
D
5
D
4
D
3
D
2
D
1
D
0
12345678
Data
Pointer
Write 1-byte Data
Write 2-byte Data
MCP9805
MCP9805
P
2
P
2
MCP9805
DS21977C-page 24 2005-2013 Microchip Technology Inc.
FIGURE 5-4: Receive 1-byte Data from Previously Set Pointer.
S = START Condition
P = STOP Condition
SDA
A
C
K
0011
A
Pointer
0000
P
A
C
K
S
2
A
1
A
0
1
P
0
12345678 12345678
SCLK
0
Address Byte
A
C
K
0011
A
N
A
K
S
2
A
1
A
0
D
7
D
6
D
5
D
4
D
3
D
2
D
1
D
0
12345678 12345678
Address Byte
Data
R
MCP9805
MCP9805
MCP9805
Master
W
A
C
K
0011
A
N
A
K
S
2
A
1
A
0
D
7
D
6
D
5
D
4
D
3
D
2
D
1
D
0
12345678 12345678
Address Byte
Data
R
MCP9805
Master
Note: User can continue to receive 1-byte or 2-byte data (depending on the specific register)
indefinitely from a previously-set Register Pointer.
This device does not support sequential read/write.
SDA
SCLK
SDA
SCLK
Register Pointer Setting for Continuous Reception
(Note)
Receive 1-byte Data
Receive Another 1-byte Data
P
2
P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P21P22-P24P25-P27P28-P30P31-P33P34-P34

MCP9805-BE/ST

Mfr. #:
Buy MCP9805-BE/ST
Manufacturer:
Microchip Technology
Description:
Board Mount Temperature Sensors Ser output temp sensor
Lifecycle:
New from this manufacturer.
Delivery:
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