MCP23008-E/ML Microchip Technology, MCP23008-E/ML Datasheet - Page 13

• 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

1.6.4
The default comparison value is configured in the
DEFVAL register. If enabled (via GPINTEN and
INTCON) to compare against the DEFVAL register, an
opposite value on the associated pin will cause an
interrupt to occur.
REGISTER 1-4:
© 2007 Microchip Technology Inc.
bit 7
Legend:
R = Readable bit
-n = Value at POR
bit 7-0
R/W-0
DEF7
DEFAULT COMPARE (DEFVAL)
REGISTER FOR INTERRUPT-ON-
CHANGE
DEF7:DEF0: These bits set the compare value for pins configured for interrupt-on-change from
defaults <7:0>. Refer to INTCON.
If the associated pin level is the opposite from the register bit, an interrupt occurs.
Refer to INTCON and GPINTEN.
R/W-0
DEF6
DEFVAL – DEFAULT VALUE REGISTER (ADDR 0x03)
W = Writable bit
‘1’ = Bit is set
R/W-0
DEF5
R/W-0
DEF4
‘0’ = Bit is cleared
U = Unimplemented bit, read as ‘0’
MCP23008/MCP23S08
R/W-0
DEF3
R/W-0
DEF2
x = Bit is unknown
R/W-0
DEF1
DS21919E-page 13
R/W-0
DEF0
bit 0