W921C842 Просмотр технического описания (PDF) - Winbond

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W921C842

4-BIT MICROCONTROLLER

Winbond 

W921E840A/W921C840

− PB Port: PB.0 to PB.3 open drain and pull high resistor option

− PC Port: PC.1 to PC.3 open drain and pull high resistor option

− PD Port: PD.0 to PD.1 open drain and pull high resistor option

Serial I/O Interface

• Clock synchronous multi-nibbles serial transmitter/receiver interface

DTMF Generator

• One channel DTMF generator

Beep Tone Generator

• One channel beep tone generator

8-bit D/A Converter

• One channel 8-bit D/A converter

Voltage Comparator

• Multiplexed four channel voltage comparator

Timer/Counter

• Timer 0: 2 to 19 order divider

Auto-reload timer

Watch-dog timer

• Timer 1: 2 to 19 order divider

Auto-reload timer

Arbitrary waveform generator

External event counter

• Timer 2: 2 to 19 order divider

Auto-reload timer

Arbitrary waveform generator

Period/pulse width measurement function

• Timer 3: 2 to 19 order divider

Auto-reload timer

Interrupt

• Four external sources: INT0 (P4.3), P4 Port (P4.0 to P4.2)

• Six internal sources: Timer 0, Timer 1, Timer 2, Timer 3, Comparator, Serial Port

Operating Mode (System Clock)

• Normal mode: system clock operating

• HOLD mode: no operation except for oscillator (system clock stops only)

• STOP mode: no operation including oscillator

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