W742E816 Просмотр технического описания (PDF) - Winbond

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W742E816

4-BIT MICROCONTROLLER

Winbond 

W742E/C816

Deleted: SA5505

Deleted: W742C811

• 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 non-modulating 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 dialing

• FSK output

− Output FSK signal of CCITT V.23 or Bellcore 202 by mask option

• 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 18/14-bit watchdog timer selectable for system reset, enable/disable by code option

• 16-level stack buffer

• Packaged in 100-pin QFP

-4-

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