• 8-bit static pipeline CPU
• ROM: 24K x 8 bits(4K/8K)
• (OTP for UM66P14, mask for UM6614)RAM: 384 x 8 bits(256/128)
• Operation voltage : 2.4V ~ 3.6V
• 10 CMOS Bi-directional bit programmable I/O pins
• 8 Output pins (Shared with LCD common/segment)
• 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
• 128-level deep stack
• Dual clock source :
  - OSCX: Crystal oscillator: 32.768K Hz
  - OSC:   RC oscillator 500K ~ 4M Hz (dedicated for game)
• Build-in oscillator with warm-up timer
• LCD driver programmable 30*8 or 34*4duty :
  -  320 ( 8x40) dots ( 1/8 duty, 1/4 bias)
  -  160 ( 4x40) dots ( 1/4 duty, 1/3 bias)
  - Internal bias resistor(1/4 bias, 1/3 bias) with 32 - - - level driving strength control.
• Programmable Sound  Generator (PSG) includes :
  - Tone generator
  - Sound effect generator
  - 4 level volume control
  - Digital DAC for speech / tone
• Three power down  modes :
  - WAI0 mode
  - WAI1 mode
  - STP  mode

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