C261 Selling Leads, Price trend, C261 DataSheet download, circuit diagram from SeekIC.com

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) − ...

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SeekIC No. : 004308635 Detail

C261: 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...

C261 Data Sheet

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Part Number:: C261
Supply Ability:: 5000

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Product Details

Description

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) W541E/C261 DATA SHEET
• 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 three internal clock frequencies (FOSC or FOSC/64,Fs)
      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
• Powerful instruction set: 120 instructions
• 8-level subroutine (include interrupt) nesting
• Up to 1 S instruction cycle (with 4 MHz operating frequency)
• Packaged in 80-pin QFP

Pinout

Connection Diagram

Specifications

Parameter	RATING	UNIT
Supply Voltage to Ground Potential	-0.3 to +7.0	V
Applied Input/Output Voltage	-0.3 to +7.0	V
Power Dissipation	120	mW
Ambient Operating Temperature	0 to +70
Storage Temperature	-55 to +150

Note: Exposure to conditions beyond those listed under Absolute Maximum Ratings may adversely affect the life
and reliability of the device.

Description

The W541E261 and W541C261 are high-performance 4-bit microcontroller (C) with an LCD driver and the flash EEPROM and mask ROM for the program memory. C261 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 W541E261 and W541C261 have two power reduction modes, hold mode and stop mode, which help to minimize power dissipation.

The W541E261 and W541C261 have 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, hand-held games and other products.

C261

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