LM8327 Description
The LM8327 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, hostprogrammable 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.
LM8327 Key Features
- 2 Internal RC Oscillator, no External Clock Required
- Internal PWM Clock Generation, no External Clock Required
- Programmable I2C-patible ACCESS.Bus Address (Default 0x8A)
- Support for Keypad Matrices of up to of 8 x 12 Keys, Plus 8 Special Function (SF) Keys, for a Full 104 Key Support
- Support for up to 26 Direct Connect Keys
- I2C-patible ACCESS.Bus Slave Interface at
- 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
- Multiple Key Event Storage