Description
MCP23008/MCP23S08 8-Bit I/O Expander with Serial Interface .
TABLE 1-1: PINOUT DESCRIPTION
Pin Name
PDIP/ SOIC
QFN
SSOP
Pin Type
Function
SCL/SCK 1
SDA/SI
2
A2/SO
3
A1
4
A0
5
RESET
6
NC/CS
7.
Features
* 8-Bit Remote Bidirectional I/O Port - I/O pins default to input
* High-Speed I2C Interface (MCP23008) - 100 kHz - 400 kHz - 1.7 MHz
* High-Speed SPI Interface (MCP23S08) - 10 MHz
* Hardware Address Pins - Three for the MCP23008 to allow up to eight devices on the bu
Applications
* The two devices differ in the number of hardware address pins and the serial interface:
* MCP23008
* I2C interface; three address pins
* MCP23S08
* SPI interface; two address pins
The MCP23X08 consists of multiple 8-bit Configuration registers for input, output and p
