FEATURES

• 4-bit microcontroller for digital tuning system

• Internal PLL frequency synthesizer: With prescaler

mPB595

• 5 V ±10

• Low-power CMOS

• Program memory (ROM): 8K bytes (16 bits ´ 3968

steps)

• Data memory (RAM): 4 bits ´ 336 words

• 6 stack levels

• 35 easy-to-understand instruction sets

• Support of decimal operations

• Instruction execution time: 2 ms (with an 8-MHz

crystal)

• Internal D/A converter: 6 bits ´ 4 (PWM output)

• Internal A/D converter: 4 bits ´ 6

• Internal horizontal synchronizing signal counter

• Internal commercial power frequency counter

• Internal power-failure detector and power-on reset circuit