W742C813 Datasheet, PDF (4/56 Pages) Winbond – 4 BIT MICROCONTROLLER

W742E/C813
• Eleven interrupt sources
− Four internal interrupts (Divider0, Divider1, Timer 0, Timer 1)
− Seven external interrupts (RC.0-3, P1.2 ( INT0 ), Serial Port, P1.3 ( INT1 ))
• LCD driver output
− 40 segments x 16 commons
− 1/8 or 1/16 duty (selected by code option) 1/5 bias driving mode
− Clock source should be the sub-oscillator clock in the dual-clock operation mode
− 8 level software LCD contrast adjusting
− LCD operating voltage source could come from VDD or VLCD1 pin input
• MFP output pin
− Output is software controlled to generate modulating or nonmodulating frequency
− Works as frequency output specified by Timer 1
− Key tone generator
• DTMF output pin
− Output is one channel Dual Tone Multi-Frequency signal for dialling
• 8-bit Serial I/O Interface
− 8-bit transmit/receive mode by internal or external clock source
• Two built-in 14-bit frequency dividers
− Divider0: the clock source is the main oscillator (FOSC)
− Divider1: the clock source is the sub-oscillator (Fs)
• Two built-in 8-bit programmable countdown timers
− Timer 0: one of two internal clock frequencies (FOSC/4 or FOSC/1024) can be selected
− Timer 1: with auto-reload function and one of two internal clock frequencies (FOSC or FOSC/64 or
Fs) can be selected (signal output through MFP pin)
• Built-in 18/15-bit watchdog timer selectable for system reset, enable/disable by code option
• Powerful instruction set: 1XX instructions
• 16-level stack buffer
• Packaged in 100-pin QFP
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