W921E400A Datasheet, PDF (4/53 Pages) Winbond – 4-BIT MICROCONTROLLER

W921E400A/W921C400
Serial I/O Interface
• Clock synchronous multi-nibbles serial transmitter/receiver interface
DTMF Generator
• One channel DTMF generator
Beep Tone Generator
• 4 frequencies (2K, 1K, 630, 520 Hz) software selectable beep tone generator
Voltage Comparator
• Multiplexed four channel voltage comparator
Timer/Counter
• Timer 0: 2 to 19 order divider, auto-reload timer, watch-dog timer
• 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
• Two external sources: INT0 (P4.3), P4 Port (P4.2)
• Five internal sources: Timer 0, 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
Addressing Mode
• ROM: Indirect call addressing mode
Long jump/call addressing mode
• RAM: Direct addressing mode
Indirect addressing mode
Working register addressing mode
• Look-up table addressing mode
Instruction Sets
• 117 instruction sets
Package Type
• 28-pin DIP, 28-pin SOP
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