W541L260 Datasheet, PDF (2/11 Pages) Winbond – 4-BIT MICROCONTROLLER

W541L260
1. GENERAL DESCRIPTION
W541L260 is fully compatible with W741L260 in the terms of pin assignment and IC functon except
main oscillator. It is a high-performance 4-bit microcontroller (μC) with an LCD driver. The device
contains a 4-bit ALU, two 8-bit timers, two dividers, a 32 × 4 LCD driver, and five 4-bit I/O ports
(including 1 output port to drive the LEDs). There are also five interrupt sources and 8-level subroutine
nesting for interrupt applications. The W541L260 has one power reduction mode to help minimize
power dissipation.
The W541L260 has two oscillator circuits and can work in dual-clock or single-clock operation mode.
It is suitable for remote controllers, watches and clocks, speech synthesis LSI controllers, and other
products.
2. FEATURES
• Operating voltage: 1.2V−1.8V (LCD drive voltage: 3.0V, or 4.5V)
• Single or Dual Clock Mode
− Single (main oscillator only) or dual clock (both main and sub-oscilator) by mask option .
− 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 1 MHz) or low-frequency clock (32.768 KHz) is
selected by mask code option
• 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
• 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)
− Do not be floating when it is as input or output open-drain (NMOS type).
• Power-down mode
− Hold function: no operation (except for oscillator)
− Stop function: no operation (including main clock)
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