MCP23008-E/ML Microchip Technology, MCP23008-E/ML Datasheet - Page 10

• Manufacturer Part Number: MCP23008-E/ML
• Description: IC I/O EXPANDER I2C 8B 20QFN
• Manufacturer: Microchip Technology

Specifications of MCP23008-E/ML

• Interface: I²C
• Number Of I /o: 8
• Interrupt Output: Yes
• Frequency - Clock: 1.7MHz
• Voltage - Supply: 1.8 V ~ 5.5 V
• Operating Temperature: -40°C ~ 125°C
• Mounting Type: Surface Mount
• Package / Case: 20-VQFN Exposed Pad, 20-HVQFN, 20-SQFN, 20-DHVQFN
• Includes: POR
• Chip Configuration: 8 Bit
• Bus Frequency: 1.7MHz
• Ic Interface Type: I2C, Serial
• No. Of I/o's: 8
• Supply Voltage Range: 4.5V To 5.5V
• Digital Ic Case Style: QFN
• No. Of Pins: 20
• Termination Type: SMD
• Rohs Compliant: Yes
• Filter Terminals: SMD
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With: GPIODM-KPLCD - BOARD DEMO LCD GPIO EXP KEYPAD
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Lead free / RoHS Compliant

MCP23008/MCP23S08
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:
DS21919E-page 10
bit 7
Legend:
R = Readable bit
-n = Value at POR
bit 7-0
R/W-1
IO7
I/O DIRECTION (IODIR) REGISTER
IO7:IO0: These bits control 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 (ADDR 0x00)
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
© 2007 Microchip Technology Inc.
x = Bit is unknown
R/W-1
IO1
R/W-1
IO0
bit 0