MCP23008T-E/SO Microchip Technology, MCP23008T-E/SO Datasheet - Page 16

• Manufacturer Part Number: MCP23008T-E/SO
• Description: IC I/O EXPANDER I2C 8B 18SOIC
• Manufacturer: Microchip Technology

Specifications of MCP23008T-E/SO

• 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: 18-SOIC (7.5mm Width)
• Includes: POR
• For Use With: GPIODM-KPLCD - BOARD DEMO LCD GPIO EXP KEYPAD
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

MCP23008/MCP23S08
1.6.7
The GPPU register controls the pull-up resistors for the
port pins. If a bit is set and the corresponding pin is
configured as an input, the corresponding port pin is
internally pulled up with a 100 kΩ resistor.
REGISTER 1-7:
DS21919E-page 16
bit 7
Legend:
R = Readable bit
-n = Value at POR
bit 7-0
R/W-0
PU7
PULL-UP RESISTOR
CONFIGURATION (GPPU)
REGISTER
PU7:PU0: These bits control the weak pull-up resistors on each pin (when configured as an input)
<7:0>.
1 = Pull-up enabled.
0 = Pull-up disabled.
R/W-0
PU6
GPPU – GPIO PULL-UP RESISTOR REGISTER (ADDR 0x06)
W = Writable bit
‘1’ = Bit is set
R/W-0
PU5
R/W-0
PU4
U = Unimplemented bit, read as ‘0’
‘0’ = Bit is cleared
R/W-0
PU3
R/W-0
PU2
© 2007 Microchip Technology Inc.
x = Bit is unknown
R/W-0
PU1
R/W-0
PU0
bit 0