General Description

The Enhanced A/D MCUs are a series of 8-bit high performance, RISC architecture microcontrollers specifically designed for a wide range of applications. The usual Holtek microcontroller features of low power consumption, I/O flexibility, timer functions, oscillator options, power down and wake-up functions, watchdog timer and low voltage reset, combine to provide devices with a huge range of functional options while still maintaining a high level of cost effectiveness. In addition, these devices

Features

 CPU Features

  · Operating voltage:

     fSYS = 4MHz: 2.2V~5.5V

     fSYS = 8MHz: 3.3V~5.5V

     fSYS = 12MHz: 4.5V~5.5V

  · Up to 0.33ms instruction cycle with 12MHz system clock at VDD= 5V

  · Oscillator types:

     External high freuency Crystal -- HXT

     External RC -- ERC

     Internal RC -- HIRC

     External low frequency crystal -- LXT

  · Three operational modes: Normal, Slow, Sleep

  · Fully integrated internal 4MHz, 8MHz and 12MHz oscillator requires no external components

  · Watchdog Timer function

  · LIRC oscillator function for watchdog timer

  · All instructions executed in one or two instruction cycles

  · Table read instructions

  · 63 powerful instructions

  · Up to 6-level subroutine nesting

  · Bit manipulation instruction

  · Low voltage reset function

  · Wide range of available package types

 Peripheral Features

  · Up to 26 bidirectional I/O lines

  · Up to 8 channel 12-bit ADC

  · Up to 2 channel 8-bit PWM

  · Software controlled 4-SCOM lines LCD driver with 1/2 bias

  · External interrupt input shared with an I/O line

  · Up to two 8-bit programmable Timer/Event Counter with overflow interrupt and prescaler

  · Time-Base function

  · Programmable Frequency Divider -- PFD

  · 8x8 LED driving capability