General Description
The Cost-Effective A/D Type MCU Devices are a series of 8-bit high performance RISC architecture
microcontrollers, designed especially for applications that interface directly to analog signals, such as those from sensors. All devices include an integrated multi-channel Analog to Digital Converter in addition to one or two Pulse Width Modulation outputs. The usual Holtek MCU features such as power down and wake-up functions, oscillator options, programmable frequency divider, etc. combine to ensure user applications require a minimum of external components.

FEATUREs
Operating voltage:
   fSYS=4MHz: 2.2V~5.5V
   fSYS=8MHz: 3.3V~5.5V
13 to 23 bidirectional I/O lines
External interrupt input shared with an I/O line
8-bit programmable Timer/Event Counter with over flow interrupt and 7-stage prescaler
On-chip crystal and RC oscillator
Watchdog Timer function
PFD for audio frequency generation
Power down and wake-up functions to reduce power consumption
1288 EEPROM data memory
Up to 0.5s instruction cycle with 8MHz system clock at VDD=5V
4 or 6-level subroutine nesting
4 channels 8 or 9-bit resolution A/D converter
1 or 2 channel 8-bit PWM output shared with I/O lines
Bit manipulation instruction
Table read instructions
63 powerful instructions
All instructions executed in one or two machine cycles
Low voltage reset function
Range of packaging types