Datasheet

MCP4017/18/19
DS22147A-page 40 © 2009 Microchip Technology Inc.
FIGURE 5-14: I
2
C Communication Behavior.
Write 1 Byte
Write 2 Bytes
Read 1 Byte
Read 2 Bytes
S Slave Address
R
/
W A Data Byte
(1)
AP
Master S010111101xddddddd1P
MCP4017/18/19 0 0
I
2
C Bus S010111100xddddddd0P
S Slave Address
R
/
W A Data Byte
(1)
AData Byte
(1)
AP
Master S010111101xddddddd1xddddddd1P
MCP4017/18/19 0 0 0
I
2
C Bus S010111100xddddddd0xddddddd1P
S Slave Address
R
/
WA Data Byte A P
Master S010111111 1P
MCP4017/18/19 0 0 d d d d d d d 1
I
2
C Bus S0101111100ddddddd1P
S Slave Address
R
/
W A Data Byte A Data Byte A P
Master S 010111111 0 1P
MCP4017/18/19 00ddddddd1 0ddddddd1
I
2
C Bus S 0101111100ddddddd00ddddddd1 P
Note 1: For Write Commands, the MSb of the Data Byte is a don’t care since the wiper register is only 7-bits wide.