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ManualsBrandsMICROCHIP TECHNOLOGY ManualsInterface ICsInterface IC - I/O extensions POR I²C 3.4 MHz SSOP 20
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© 2009 Microchip Technology Inc. DS22121B-page 13
MCP23009/MCP23S09
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 MCP23009.
0100000R/WA7A6A5A4A3A2A1A0
Device Opcode
Register Address
CS