MCP23S09T-E/SO Microchip Technology, MCP23S09T-E/SO Datasheet - Page 16

• Manufacturer Part Number: MCP23S09T-E/SO
• Description: 8-bit Input/Output Expander, SPI Interface 18 SOIC .300in T/R
• Manufacturer: Microchip Technology

Specifications of MCP23S09T-E/SO

• Interface: SPI
• Number Of I /o: 8
• Interrupt Output: Yes
• Frequency - Clock: 10MHz
• Voltage - Supply: 1.8 V ~ 5.5 V
• Operating Temperature: -40°C ~ 125°C
• Mounting Type: Surface Mount
• Package / Case: 18-SOIC (7.5mm Width)
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

MCP23009/MCP23S09
1.6.1
Controls the direction of the data I/O.
When a bit is set, the corresponding pin becomes an
input. When a bit is clear, the corresponding pin
becomes an output.
REGISTER 1-1:
DS22121B-page 16
bit 7
Legend:
R = Readable bit
-n = Value at POR
bit 7-0
R/W-1
IO7
I/O DIRECTION REGISTER
IO7:IO0: Controls the direction of data I/O <7:0>
1 = Pin is configured as an input
0 = Pin is configured as an output
R/W-1
IO6
IODIR – I/O DIRECTION REGISTER
W = Writable bit
‘1’ = Bit is set
R/W-1
IO5
R/W-1
IO4
U = Unimplemented bit, read as ‘0’
‘0’ = Bit is cleared
R/W-1
IO3
R/W-1
IO2
© 2009 Microchip Technology Inc.
x = Bit is unknown
R/W-1
IO1
R/W-1
IO0
bit 0