NCA9555 - 16-bit I2C-bus I/O port
0 10 10 10 6.1.
DEVICE ADDRESS 10 6.2.
COMMAND BYTE10 6.3.
REGISTERS 0 AND 1: INPUT PORT REGISTERS10 6.4.
REGISTERS 2 AND 3 : OUTPUT PORT REGISTERS
NCA9555 16-bit I2C-bus I/O port with interrupt Datasheet (EN) 1.4 Product Overview The NCA9555 is a 24-pin CMOS device that provides 16 bits of General Purpose parallel Input/Output (GPIO) expansion for I2C-bus applications.
It provides a simple solution when additional I/O is needed for ACPI power switches, sensors, push buttons, LEDs, fans, etc.
The NCA9555 consists of two 8-bit Configuration (Input or Output selection); Input, Output and Polarity Inversion (active HIGH or active LOW operatio
NCA9555 Features
* Operating power supply voltage range of 2.3 V to 5.5 V
* 5 V tolerant I/Os
* I2C to Parallel Port Expander
* Polarity Inversion register
* Active LOW interrupt output
* Compatible With Most Microcontrollers
* Address by Three Hardware Address Pins for Use of up to Eight
