LM8328 Description
The LM8328 GenI/O - Expander and Keypad Controller is a dedicated device to unburden a host processor from scanning a matrix-addressed keypad and to provide flexible and general purpose, host programmable input/output functions. Three independent PWM timer outputs are provided for dynamic LED brightness modulation. It municates with a host processor through an I2C-patible ACCESS.bus serial interface.
LM8328 Key Features
- 2 KEY FEATURES
- Internal RC Oscillator, No External Clock Required
- Internal PWM Clock Generation, No External Clock Required
- External Reset for System Control
- Programmable I2C-patible ACCESS.bus
- Support for Keypad Matrices of up to of 8 x 12 Keys, Plus 8 Special Function (SF) Keys, for a Full 104 Key Support
- I2C-patible ACCESS.bus Slave Interface at 100 kHz (Standard-Mode) and 400 kHz (Fast-Mode)
- Three Host-programmable PWM Outputs for Smooth LED Brightness Modulation
- Supports General-purpose I/O Expansion on Pins Not Otherwise Used for Keypad or PWM Output
- 15 byte Key Event Buffer