W541C261 データシートの表示（PDF） - Winbond

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W541C261

4BIT MICROCONTROLLER, 2K ×16 ROM, 128 ×4 RAM 128 -DOT LCD

Winbond 

W541E/C261 DATA SHEET

2. FEATURES

• Operating voltage: 2.4V to 5.5V (LCD drive voltage: 3.0V, or 4.5V)

• Operating frequency up to 4 MHz

• Crystal/RC oscillation circuit selectable by code option for system clock

• Memory

− 2048 × 16 bit program ROM (including 2K × 4 bit look-up table)

− 128 × 4 bit data RAM (including 16 working registers)

− 32 × 4 LCD data RAM

• Single or Dual Clock Mode

− Single (main oscillator only) or dual clock (both main and sub-oscilator) by mask option .

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

(FOSC = Fs and Fm is stopped)

− Sub-oscillator is only 32.768 KHz crystal for dual clock mode.

− Main oscillator is crystal or RC oscillation by mask code option .

− Main clock : High-frequency clock (400 KHz to 4 MHz) or low-frequency clock (32.768 KHz) is

selected by mask code option.

• 21 input/output pins

− Ports for input only: 2 ports/8 pins

− Input/output ports: 2 ports/8 pins

− Port for output only: 1 port /4 pins (high sink current to drive LEDs)

− MFP output pin: 1 pin (MFP)

• Power-down mode

− Hold function: no operation (except for oscillator)

− Stop function: no operation

• Five types of interrupts

− Four internal interrupts (Divider 0, Divider 1, Timer 0, Timer 1)

− One external interrupt (Port RC)

• LCD driver output

− 32 segment × 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 ports; selectable by code option

• MFP output pin

− Output is software selectable as modulating or nonmodulating frequency

− Works as frequency output specified by Timer 1

• Two built-in 14-bit clock frequency divider circuit (divider 0 and divider 1)

Publication Release Date: June 12, 2007

-3-

Revision A1

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