Description
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
INT
8
VSS
9
GP0
10
GP1
11
GP2
12
GP3
13
GP4
14
GP5
15
GP6
16
GP7
17
VDD
18
N/C
I Serial clock input.
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 bus - Two for the MCP23S08 to allow up to four devices using the same Chip Select.
- Configurable Interrupt Output Pin - Configurable as active-high, active-low or open-drain
Block Diagram
MCP2.
MCP23008 Datasheet
