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參數資料
型號: W742C814
廠商: WINBOND ELECTRONICS CORP
元件分類: 4位微控制器
英文描述: 4-BIT SINGLE-CHIP MICROCONTROLLER FOR SMALL GENERAL-PURPOSE INFRARED REMOTE CONTROL TRANSMITTER
中文描述: 4位單片機的小型通用紅外遙控器
文件頁數: 3/46頁
文件大小: 704K
代理商: W742C814
W742C814
Publication Release Date: February 12, 2003
- 3 -
Revision A2
1. GENERAL DESCRIPTION
The W742C814 is a high-performance 4-bit micro-controller (
μ
C) that provides an LCD driver. The
device contains a 4-bit ALU, two 8-bit timers, two dividers (for two oscillators) in dual-clock operation,
a 32
×
4 LCD driver, five 4-bit I/O ports (including 1 output port for LED driving), and one channel
DTMF generator. There are also five interrupt sources and 8-levels subroutine nesting for call
subroutine or interrupt applications. The W742C814 operates on very low current and has two power
reduction modes, that is the dual-clock slow operation and STOP mode, which help to minimize power
dissipation.
2. FEATURES
Operating voltage: 2.4V - 5.5V
Dual-clock operation mode (Connect to 32768 Hz crystal only)
Fslow oscillator: 32768 Hz OSC
Ffast oscillator: PLL (Phase Lock Loop) output enable
Memory
4096 x 16 bits program ROM (including 16K x 4 bit look-up table)
1024 x 4 bits data RAM (including 16 nibbles x 16 pages working registers)
32 x 4 LCD data RAM
20 input/output pins
Port for input only: 1 ports/4 pins (RC)
Input/output ports: 3 ports/12 pins (RA, RB & RD)
High sink current output port for LED driving: 1 port /4 pins (RE)
Power-down mode
Hold function: no operation (excluding Fslow and Fosc oscillator)
Stop function: no operation (Fslow and Fosc oscillator are stopped)
Dual-clock slow operation mode: system is operated by 32768 Hz (F
OSC
= Fslow and Ffast
stopped)
Five types of interrupts
Four internal interrupts (Divider0, Divider1, Timer 0, Timer 1)
One external interrupts (RC Port)
LCD driver output
32 segments x 4 commons
1/4 duty 1/3 bias driving mode
MFP output pin
Output is software selectable as modulating or non-modulating frequency
Works as frequency output specified by Timer 1
DTMF output pin (PLL should be enable in this function)
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