Features
■ CM8414 based single-chip 4-bit micro-controller
■ ROM: 4096 X 16 bits
■ RAM: 512 X 4 bits
■ Operation voltage: 2.2V - 6.0V
■ 8 CMOS bi-directional I/O pins
■ 4-Level subroutine nesting (include interrupts)
■ One 8-bit auto re-load timer/counter
■ Warm-up timer for power-on reset
■ Powerful interrupt sources:
■ External interrupts ( )
■ Internal interrupt (Timer0) -
■ Internal interrupt (Base Timer)
■ Port's falling edge interrupt: PORTB ( )
■ 8-bit Base timer
■ LCD driver:
240 dots (1/8 duty 1/4 bias) or m
136 dots (1/4 duty 1/3 bias)
■ LCD used as scan output
■ Built-in dual tone PSG with one noise generator
■ 2 Clock sources
OSC: (code option select crystal or RC type)
- Crystal oscillator 32.768K
- RC oscillator: 262K
OSCX: (system register selected ceramic or RC type)
- Ceramic oscillator 455K
- RC oscillator
■ Instruction cycle time:
- 122.07µs for 32.768 KHz crystal
- 15.27µs for 262 KHz RC
- 8.79µs for 455 KHz ceramic
- 2.22µs for 1.8 MHz RC
- 2µs for 2.0 MHz RC
■ Two low power operation modes: HALT and STOP
■ Low power consumption
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