Description
The LM8333 is a general-purpose controller for matrixaddressed keypads which provides an ACCESS.bus (I2Ccompatible) interface to a host microcontroller.
Features
- n 8 x 8 standard keys n 8 special function keys (SF keys) providing a total of 72 keys for the maximum keyboard matrix n ACCESS. bus (I2C-compatible) communication interface to the host n Four general purpose host programmable I/O pins with two optional (slow) external Interrupts n 16 byte FIFO buffer to store key pressed and key released events n Error control with error reports on (FIFO overrun, Keypad overrun, invalid command) n Host programmable PWM n Host programmable active time and debounc.
LM8333_NationalSemiconductor.pdf
