Datasheet

MCP23018/MCP23S18
DS22103A-page 14 © 2008 Microchip Technology Inc.
FIGURE 1-8: I
2
C™ ADDRESSING REGISTERS
FIGURE 1-9: SPI ADDRESSING REGISTERS
S0100A2A1A00ACKA7A6A5A4A3A2A1A0ACK
Device Opcode Register Address
R/W = 0
The ACKs are provided by the MCP23X18.
0100000R/WA7A6A5A4A3A2A1A0
Device Opcode
Register Address
CS