• 8-bit static pipeline CPU
• ROM: 16K x 8 bits
• RAM: 192 x 8 bits
• Operation voltage : 2.4V ~ 3.6V
• 24 CMOS Bi-directional bit programmable I/O pins
  - Twenty (Port-A high nibble & Port-B/C) are shared with LCD drives
• 6 Output pins (Four are shared with LCD common and two are shared with PSG)
• 2 Input pins (code option: Shared with OSCX)
• Hardware debounce option for input port
• Bit programmable PULL-UP for input port
• Timer/Counter :
  - One 8-bit timer / 16-bit event counter
  - One 8-bit BASE timer
• Five powerful interrupt sources :
  - External interrupt (edge trigger)
  - TIMER1 interrupt
  - BASE timer interrupt
  - PORTA[7~0] interrupt (transition trigger)
  - DAC reload interrupt
• 32-level deep stack
• Dual clock source :
  - OSCX: Crystal oscillator: 32768Hz
  - OSC: RC oscillator 500K ~ 4M Hz
  CPU clock 250K ~ 2M Hz
• Build-in oscillator with warm-up timer
• LCD controller driver:
  - 16 level contrast control
  - 320 ( 8x40) dots ( 1/8 duty, 1/4 bias, programmable)
  - 160 ( 4x40) dots ( 1/4 duty, 1/3 bias, programmable)
  - Two clock source options: RC and resonator oscillator
  - Keyboard scan function supported on 20 shared segment drives
  - Internal bias resistors(1/4 bias & 1/3 bias) with 32 level driving strength control
• Programmable Sound Generator (PSG) includes :
  - Tone generator
  - Sound effect generator
  - 16 level volume control
  - Digital DAC for speech / tone
• Three power down modes :
  - WAI0 mode
  - WAI1 mode
  - STP mode

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