UPD789871中文资料瑞萨数据手册PDF规格书

FEATURES

• Internal ROM and RAM

• Minimum instruction execution time can be changed from high-speed (0.4 μs: Main system clock 5.0-MHz

operation) to ultra-low speed (122 μs: Subsystem clock 32.768-kHz operation)

• I/O ports: 33

• Timers: 5 channels

• 8-bit remote control: 1 channel

• 8-bit timer/event counter: 2 channels

• Watch timer: 1 channel

• Watchdog timer: 1 channel

• Serial interface: 1 channel

• VFD controller/driver: Total of display outputs: 25

• Power supply voltage : VDD = 2.7 to 5.5 V (in normal operation)

: VDD = 4.5 to 5.5 V (when VFD is operating)