I2C-16IO Gravitech, I2C-16IO Datasheet - Page 4

• Manufacturer Part Number: I2C-16IO
• Description: Daughter Cards & OEM Boards I2C 16-BIT GPIO EXPANDER
• Manufacturer: Gravitech

Specifications of I2C-16IO

• Rohs: yes
• Product: Expansion Boards
• Description/function: 16 bits general purpose parallel input-output expansion using I2C bus
• Dimensions: 1.1 in x 0.7 in
• Interface Type: I2C
• Operating Supply Voltage: 2.3 V to 5.5 V
• Tool Is For Evaluation Of: PCA9535
• For Use With: Breadboards

is read independently, the interrupt
caused by Port 0 will not be cleared by a
read of Port 1 or the other way around.
Note that changing an I/O from an output
to an input may cause a false interrupt to
occur if the state of the pin does not
match the contents of the Input Port
register.
Only two signal lines SDA and SCL are
required for I
specification for more information.
Default
manufacture is 0x40 for write and 0x41
for read.
A2 = 0
A1 = 0
A0 = 0
The address can be easily change by
solder
corresponding address pin to VCC or
GND at the bottom of the module. These
eight combinations allow up to eight
devices to share the same I
is total of 128 I/O pins!
I
I
2
2
C address:
C pins:
Module Configuration
the
address
2
C bus. Please refer to I
Copyright © 2007 MicroResearch
I2C-16IO
bridge
GRAVITECH GROUP
shipped
between
2
TM
C bus. That
from
I
2
C 16-Bit I/O User Manual
the
the
2
C
WWW.GRAVITECH.US
The green LED on the module is
illuminating when the power applied. The
power-on LED is enabled from the
manufacture. It can be disabling for light
sensitive or low current requirement
application by remove the solder bridge
on “PWLED” at the bottom of the
module.
Since the interrupt pin is an open-drain,
there is a pull-up resistor on the module.
The pull-up resistor is enabled from the
manufacture. It can be disabling by
remove the solder bridge on “INTPU” at
the bottom of the module.
I
pull-up resistors on SDA and SCL pin.
I2C-16IO come with these two pull-up
resistors enabled from the manufacture.
It can be disabling when connect to I
bus that already have pull-up resistors
by remove the solder bridge on “I2CPU”
at the bottom of the module.
Power-on LED:
2
Interrupt pull-up resistor:
I
C bus specification required to have
2
C pull-up resistors:
2
C