General Description
The device are 8-bit, high performance, RISC architec ture microcontroller devices specifically designed for A/D applications that interface directly to analog signals, such as those from sensors.

FEATUREs
• Operating voltage:
      fSYS=4MHz: 2.2V~5.5V
      fSYS=8MHz: 3.3V~5.5V
• 16 bidirectional I/O lines
• Two 8-bit programmable timer/event counter with overflow interrupt and 7-stage prescaler
• One 8-bit programmable pulse generators (PPG) output channel, with prescaler and 8-bit program mable timer counter, and supports active low or active high output
• On-chip crystal and RC oscillator
• Watchdog Timer
• 2048 X 14 program memory
• 88 X 8 data memory RAM
• Supports PFD for sound generation
• HALT function and wake-up feature reduce power consumption
• Up to 0.5μs instruction cycle with 8MHz system clock at VDD=5V
• 8-level subroutine nesting
• 4 channels 9-bit resolution A/D converter
• Two comparators with interrupt function
• Bit manipulation instruction
• 14-bit table read instruction
• 63 powerful instructions
• All instructions in one or two machine cycles
• Low voltage reset function
• 24-pin SKDIP/SOP package