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.

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 0.33μs instruction cycle with 12MHz system clock at VDD=5V
●Oscillator types:
  ♦ External high frequency crystal -- HXT
  ♦ Internal RC -- HIRC
●Power down modes and wake-up function
●Fully integrated internal 4MHz, 8MHz and 12MHz oscillator requires no external components
●LIRC oscillator function for watchdog timer
●All instructions executed in one or two instruction cycles
●Table read instructions
●63 powerful instructions
●Up to 4-level stack
●Bit manipulation instruction

Peripheral Features
●Up to 2048×16 program memory
●Up to 96×8 data memory
●Up to 14 bidirectional I/O lines
●Up to 4 channel 12-bit ADC
●1 channel 8-bit PWM
●Low voltage reset function
●Watchdog timer function
●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 functions
●Programmable Frequency Divider - PFD
●Package Types: 16 DIP/NSOP