MCP40D17 Microchip Technology Inc., MCP40D17 Datasheet - Page 39

• Manufacturer Part Number: MCP40D17
• Description: 7-bit Single I 2 C? With Command Code Digital Pot With Volatile Memory In Sc70
• Manufacturer: Microchip Technology Inc.

FIGURE 5-13:
FIGURE 5-14:
© 2009 Microchip Technology Inc.
Legend
Write 1 Byte with Command Code = 00h
Write 2 Byte with Command Code = 00h
S = Start Condition
P = Stop Condition
A = Acknowledge
X = Don’t Care
R/W = Read/Write bit
D6:D0 = Data bits
Master
MCP40D17/18/19
I
Master
MCP40D17/18/19
I
Master
MCP40D17/18/19
I
2
2
2
C Bus
C Bus
C Bus
S
0 1 0
Slave Address Byte
Fixed
Address
I
I
X D6 D5 D4
2
2
C Write Command Format (Slave Address = “0101110”).
C Write Communication Behavior (Slave Address = “0101110”).
1
S Slave Address
S 0 1 0 1 1 1 0 0 1 0 0 0 0 0 0 0 0 1 0 d d d d d d d 1 P
S 0 1 0 1 1 1 0 0 0 0 0 0 0 0 0 0 0 0 0 d d d d d d d 0 P
S Slave Address
S 0 1 0 1 1 1 0 0 1 0 0 0 0 0 0 0 0 1 0 d d d d d d d 1
S 0 1 0 1 1 1 0 0 0 0 0 0 0 0 0 0 0 0 0 d d d d d d d 0
1
Data Byte
1 1
D3 D2 D1 D0
0
A
Read/Write bit (“0” = Write)
0 0
R
W
/
R
/
W
A
Command Code
A
C
K Command Code
0
A
C
K Command Code
0
0 0
X D6 D5 D4
0
Data Byte
0
D3
0 0
D2 D1 D0 A P
MCP40D17/18/19
A
A
C
K Data Byte
0
A
C
K Data Byte
0
X D6 D5 D4
Data Byte
0 d d d d d d d 1 P
0 d d d d d d d 0 P
STOP bit
Data Byte
D3
D2 D1 D0 A
DS22152B-page 39
A
C
K P
0
A
C
K
0
A
C
K P
0