W742C81A データシートの表示（PDF） - Winbond

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W742C81A

4-BIT MICROCONTROLLER

Winbond 

Preliminary W742E81A/W742C81A

• LCD driver output

− 40 segments x 4 commons

− 1/4 duty 1/3 bias driving mode

− Clock source should be the sub-oscillator clock in the dual-clock operation mode

• MFP output pin

− Output is software selectable as modulating or nonmodulating frequency

− Works as frequency output specified by Timer 1

• DTMF output pin

− Output is one channel Dual Tone Multi-Frequency signal for dialling

• Two built-in 14-bit frequency dividers

− Divider0: the clock source is the output of the main-oscillator

− Divider1: the clock source is the output of the sub-oscillator (dual-clock mode) or the Fosc/128

(single-clock mode)

• 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 three internal clock frequencies (FOSC, FOSC/64 or

Fs) can be selected by MR1 register; and the specified frequency can be delivered to MFP pin

• Built-in 18/15-bit watchdog timer selectable for system reset; enable the watch dog timer or not is

determined by code option

• Powerful instruction set: 142 instructions

• 16-levels subroutine (include interrupt) nesting

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