W541E260 データシートの表示（PDF） - Winbond

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W541E260

4-BIT FLASH EPROM MICROCONTROLLER

Winbond 

W541E260

• Power-down mode

− Hold function: no operation (excluding main oscillator and sub-oscillator)

− Stop function: no operation (excluding sub-oscillator)

− Dual-clock slow operation mode: system is operated by the sub-oscillator

(FOSC = Fs and Fm is stopped)

• Five types of interrupts

− Four internal interrupts (Divider0, Divider1, Timer0, Timer1) for W541C260 body;

three internal interrupts (Divider0, Timer0, Timer1) for W541C250 body.

− One external interrupt (RC Port) for W541C260 body;

two external interrupts (RC port and INT pin) for W541C250 body.

• LCD driver output

− 32 segment x 4 common

− Static, 1/2 duty (1/2 bias), 1/3 duty (1/2 or 1/3 bias), 1/4 duty (1/3 bias) driving mode can be

selected

− LCD driver output pins can be used as DC output port by code option

− Clock source can be main oscillator clock in the single-clock operation mode, or sub-oscillator

clock in the dual-clock operation mode; operation mode is selected by code option

• MFP output pin

− Output is software selectable as modulating or non-modulating frequency

− Works as frequency output specified by Timer 1

• 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

• 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: includes an auto-reload function and one of two internal clock frequencies (FOSC or

FOSC/64) can be selected, or falling edge of pin RC.0 can be selected (output through MFP pin)

• Built-in 18/14-bit watchdog timer selectable for system reset

− Enable/Disable the watchdog timer can be controlled by command or by option code;

the control source (command or option code) can be determined by another option code

• Powerful instruction set: 115 instructions for W541C260 body

119 instructions for W541C250 body

• 8-level subroutine (include interrupt) nesting

• Up to 1 µS instruction cycle (with 4 MHz operating frequency)

• Packaged in 80-pin QFP

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