W921E880A/W921C880
− PA Port: PA.0−PA.3 open drain and pull high resistor option
− PB Port: PB.0−PB.3 open drain and pull high resistor option
− PC Port: PC.1−PC.3 open drain and pull high resistor option
− PD Port: PD.0−PD.3 open drain and pull high resistor option
− PE Port: PE.0−PE.3
− PF Port: PF.0−PF.3
Interrupt
• Four External sources: INT0 ( P4.3 )
P4 Port ( P4.0−P4.2 )
• Six Internal sources: Timer 0
Timer 1
Timer 2
Timer 3
Comparator
Serial Port
Timer/Counter
• Timer 0: 2−19 order divider (double source)
Auto-reload timer
Watch-dog timer
• Timer 1: 2−19 order divider
Auto-reload timer
Arbitrary waveform generator
External event counter
• Timer 2: 2−19 order divider
Auto-reload timer
Arbitrary waveform generator
Period/Pulse width measurement function
• Timer 3: 2−19 order divider
Auto-reload timer
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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