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4-BIT MICROCONTROLLER. W541C240 Datasheet

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4-BIT MICROCONTROLLER. W541C240 Datasheet






W541C240 MICROCONTROLLER. Datasheet pdf. Equivalent




W541C240 MICROCONTROLLER. Datasheet pdf. Equivalent





Part

W541C240

Description

4-BIT MICROCONTROLLER



Feature


www.DataSheet4U.com W541C240 Data Sheet 4-BIT MICROCONTROLLER Table of Content s1. 2. 3. 4. 5. 6. GENERAL DESCRIPTION ....................................... ....................................... ........................... 2 FEATURES ....................................... ....................................... ....................................... ............ 2 PIN.
Manufacture

Winbond

Datasheet
Download W541C240 Datasheet


Winbond W541C240

W541C240; CONFIGURATION ......................... ....................................... ....................................... ........ 4 BLOCK DIAGRAM .............. ....................................... ....................................... .......................... 5 PAD DESCRI PTION ................................. ....................................... ...................


Winbond W541C240

......................... 6 ELECTRICAL C HARACTERISTICS......................... ....................................... ........................... 7 6.1 6.2 6 .3 7. 8. Absolute Maximum Ratings ..... ....................................... ....................................... ....... 7 DC Characteristics .......... ....................................... ...................


Winbond W541C240

..................................... 7 AC Characteristics..................... ....................................... ....................................... ...... 8 APPLICATION CIRCUIT.......... ....................................... ....................................... ..................... 9 REVISION HISTOR Y ..................................... ...................

Part

W541C240

Description

4-BIT MICROCONTROLLER



Feature


www.DataSheet4U.com W541C240 Data Sheet 4-BIT MICROCONTROLLER Table of Content s1. 2. 3. 4. 5. 6. GENERAL DESCRIPTION ....................................... ....................................... ........................... 2 FEATURES ....................................... ....................................... ....................................... ............ 2 PIN.
Manufacture

Winbond

Datasheet
Download W541C240 Datasheet




 W541C240
www.DataSheet4U.com
W541C240 Data Sheet
4-BIT MICROCONTROLLER
Table of Contents-
1. GENERAL DESCRIPTION ......................................................................................................... 2
2. FEATURES ................................................................................................................................. 2
3. PIN CONFIGURATION ............................................................................................................... 4
4. BLOCK DIAGRAM ...................................................................................................................... 5
5. PAD DESCRIPTION ................................................................................................................... 6
6. ELECTRICAL CHARACTERISTICS........................................................................................... 7
6.1 Absolute Maximum Ratings .......................................................................................... 7
6.2 DC Characteristics ........................................................................................................ 7
6.3 AC Characteristics......................................................................................................... 8
7. APPLICATION CIRCUIT............................................................................................................. 9
8. REVISION HISTORY ................................................................................................................ 10
Publication Release Date: May 30, 2003
- 1 - Revision A1




 W541C240
W541C240
1. GENERAL DESCRIPTION
The W541C240 is a high-performance 4-bit microcontroller (µC) that provides an LCD driver.. The
device contains a 4-bit ALU, a 8-bit timers, a divider, a 24 × 4 LCD driver, and three 4-bit I/O ports.
There are also three interrupt sources and 8-level subroutine nesting for interrupt applications. The
W541C240 operates on low voltage and very low current and has two power reduction modes, hold
mode and stop mode, which help to minimize power dissipation. The W541C240 is suitable for
caculators, simple watches and clocks, multiple I/O products, keyboard controllers, speech synthesis
LSI controllers, and other products.
2. FEATURES
Operating voltage: 2.4V to 5.5V (LCD drive voltage: 3.0V or 4.5V)
Crystal/RC oscillation circuit selectable by code option for system clock
Crystal oscillator: 32.768 KHz only
RC oscillator: 1 MHz (maximum)
High-frequency (400 KHz to 1 MHz) or low-frequency (below 400 KHz) oscillation option must
be determined by the code option.
In RC mode, attention must be paid to the high/low frequency oscillation option, because the
LCD driver frequency is related to this option.
Memory
2048 × 16 bit program ROM (shared with 2K × 4 bit look-up table)
64 × 4 bit data RAM (shared with 16 working registers)
24 × 4 LCD data RAM
13 input/output pins
Ports for input only: 1 port/4 pins
Input/output ports: 2 ports/8 pins
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 oscillator)
Three types of interrupts
Two internal interrupts (Divider 0, Timer 1)
One external interrupts (Port RC)
-2-




 W541C240
W541C240
LCD driver output
24 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
MFP output pin
Output is software selectable as modulating or nonmodulating frequency
Works as frequency output specified by Timer 1
Built-in 14-bit clock frequency divider circuit
One built-in 8-bit programmable countdown timers
Timer 1: Offers auto-reload function and one of two internal clock frequencies (FOSC or FOSC/64)
can be selected (output through MFP pin)
Built-in 18/14-bit watchdog timer selectable for system reset
Powerful instruction set: 100 instructions
8-level subroutine (include interrupt) nesting
Up to 4 µS instruction cycle (with 1 MHz operating frequency)
Chip On Board available / Packaged in 64-pin QFP
Publication Release Date: May 30, 2003
- 3 - Revision A1






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