MCP23009 Microchip Technology Inc., MCP23009 Datasheet - Page 15

• Manufacturer Part Number: MCP23009
• Description: 8-bit I/o Expander With Open-drain Outputs
• Manufacturer: Microchip Technology Inc.

1.6
There are eleven (11) registers associated with the
MCP23X09 as shown in
TABLE 1-3:
© 2008 Microchip Technology Inc.
IODIRA
IPOLA
GPINTENA
DEFVALA
INTCONA
IOCON
GPPUA
INTFA
INTCAPA
GPIOA
OLATA
Register
Name
Configuration and Control
Registers
Address
(hex)
00
01
02
03
04
05
06
07
08
09
0A
CONFIGURATION AND CONTROL REGISTER
Table
GPINT7
DEF7
IOC7
ICP7
INT7
bit 7
PU7
GP7
OL7
IO7
IP7
—
1-3.
GPINT6
DEF6
IOC6
ICP6
bit 6
INT6
PU6
GP6
OL6
IO6
IP6
—
GPINT5
SEQOP
DEF5
IOC5
ICP5
bit 5
INT5
PU5
GP5
OL5
IO5
IP5
GPINT4
DEF4
IOC4
INT4
ICP4
bit 4
GP4
PU4
OL4
IO4
IP4
—
MCP23009/MCP23S09
GPINT3
DEF3
IOC3
INT3
ICP3
bit 3
GP3
PU3
OL3
IO3
IP3
—
GPINT2
DEF2
IOC2
ODR
INT2
ICP2
bit 2
PU2
GP2
OL2
IO2
IP2
GPINT1
INTPOL
DEF1
IOC1
ICP1
INT1
bit 1
PU1
GP1
OL1
IO1
IP1
GPINT0
INTCC
DEF0
IOC0
INTO
ICP0
bit 0
PU0
GP0
OL0
IO0
IP0
DS22121A-page 15
1111 1111
0000 0000
0000 0000
0000 0000
0000 0000
0000 0000
0000 0000
0000 0000
0000 0000
0000 0000
0000 0000
POR/RST
value