MCP23016 Microchip Technology, MCP23016 Datasheet - Page 11

• Manufacturer Part Number: MCP23016
• Description: 16-Bit I2C I/O Expander
• Manufacturer: Microchip Technology

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1.7.6
• IOCON0 controls the functionality of the
The IARES (Interrupt Activity Resolution) bit controls
the sampling frequency of the GP port pins. The higher
the sampling frequency, the higher the device current
requirements. If this bit is ‘0’ (default), the maximum
time to detect the activity on the port is 32 ms (max.),
which results in lower standby current. If this bit is ‘1’,
the maximum time to detect activity on the port is
200 µsec. (max.) and results in higher standby current.
REGISTER 1-11:
© 2007 Microchip Technology Inc.
bit 1-7
bit 0
IOCON1 is a shadow register for IOCON0. Access to IOCON1 results in access to IOCON0.
MCP23016.
I/O EXPANDER CONTROL
REGISTER
Unimplemented bit: Read as ‘0’
IARES
1 = Fast sample rate
0 = Normal sample rate
Legend:
R = Readable bit
- n = Value at POR
bit 7
U-0
—
:
Interrupt Activity Resolution
IOCON0 - I/0 EXPANDER CONTROL REGISTER
U-0
—
U-0
—
W = Writable bit
‘1’ = Bit is set
U-0
—
U = Unimplemented bit, read as ‘0’
‘0’ = Bit is cleared
U-0
—
U-0
—
x = Bit is unknown
U-0
—
MCP23016
IARES
R/W-0
bit 0
DS20090C-page 11