• Totally static RISC CPU
• ROM: 1M x 8-bit
• RAM: 4K x 8-bit
• Stack: Up to 128-level deep
• Operation voltage: 2.4V ~ 3.6V
• I/O ports
  - 24 CMOS bidirectional bit programmable I/O pins
  - 8 output pins (shared with LCD common output)
  - Bit programmable pull-up for input pins
  - Hardware de-bounce option for Port-A
• Low voltage detector
• Timer/Counter:
  - Two 8-bit timer/16-bit event counter
  - One 8-bit Base timer
• 6 Prioritized interrupt sources
  - External interrupt (edge triggered)
  - Timer0 interrupt
  - Timer1 interrupt
  - Base timer interrupt
  - Port-A[7~0] interrupt (transition triggered)
  - DAC reload interrupt
• Dual clock source with warm-up timer
  - Crystal oscillator  32.768K Hz
  - RC oscillator  500K~4M Hz
  - Resonator oscillator (code option)  455K~4M Hz
• Direct memory access (DMA)
  - Block-to-Block move
  - Block to Single port
• LCD controller
  - 16-level contrast control
  - 1752 (73x24) dots (1/24 duty)
  - 1168 (73x16) dots (1/16 duty)
• Programmable sound generator (PSG)
  - Two channels with three playing modes
  - Tone/noise generator
  - 16-level volume control
• PWM DAC: Three modes up to 8-bit resolution
• Three power down modes:
  - WAI0 mode
  - WAI1 mode
  - STP mode

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