CHIP FEATURES.
● DUAL OPERATION FREQUENCIES:
   - 32.768 KHZ & 0.5 SECOND TIMER INTERRUPT.
   - BUILT-IN PLL CIRCUIT TO GENERATE SYSTEM CLOCK MAX 20MHZ.
● BUILT-IN 2KBYTES(1K*16) RAM.
● ADDRESS UP TO 8MBYTE(4M*16) RAM OR ROM OR “ROM AND RAM”
   BUILT-IN 16KBYTE(8K*16) PROGRAM ROM AND 1M BYTE(512K*16) DATA ROM
● BUILT-IN DECOMPRESSION ENGINE
   THE VOICE AND MUSIC DE-COMPRESSION RATE IS AS THE FOLLOWS:
   - 2.25KBIT/SEC - 2.7KBIT/SEC - 3.15KBIT/SEC - 3.6KBIT/SEC - 4.8KBIT/SEC - 6.0KBIT/SEC
   - 7.2KBIT/SEC - 8.4KBIT/SEC - 9.6KBIT/SEC - 10.8KBIT/SEC - 12.0 KBIT/SEC - 13.2 KBIT/SEC
   - 14.4 KBIT/SEC
● BUILT-IN 12 BITS D/A, 8 BITS ADC.
● I/O PORTS
   16 I/O PINS FOR PORT A.
   12 OUTPUT FOR PORT B.
   16 I/O PINS FOR PORT C.
● TWO 16BITS TIMERS : TIMER_A AND TIMER_B.
● WATCHDOG TIMER.
● SLEEP MODE : CRYSTAL & SYSTEM