HT82K72E - Holtek

HT82K72E One Channel Keyboard

The device is an 8-bit high performance, RISC architecture microcontroller devices specifically designed for multiple I/O control product applications. With its internal 27MHz amplifier the device is suitable for applications such as 27MHz or 2.4GHz keypads etc. The advantages of low power consumption, I/O flexibility, timer functions, oscillator options, Po.

Features

· Operating voltage:
· 36 I/O bi-directional lines with pull-high options
· Supports max. 20´8 keyboard applications
· Power down and wake-up functions to reduce power fSYS= 27MHz: 2.0V~3.3V
· 36 bidirectional I/O lines
· Watchdog Timer function
· Single 16-bit internal timer with overflow interrupt and consumption
· 4-level subroutine nesting
· Bit manipulation instruction
· Table read instructions
· 63 powerful instructions
· All instructions executed in one or two machine cy- timer input
· Integrated high-drive CMOS inverter 27MHz ampli- fier
· 27MHz or 6MHz external crystal oscillator .