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參數資料
| 型號： | W742S819 |
| 廠商： | WINBOND ELECTRONICS CORP |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | 4-BIT TELEPHONE CONTROLLER |
| 中文描述： | 4-BIT, OTPROM, MICROCONTROLLER, PQFP80 |
| 封裝： | QFP-80 |
| 文件頁數： | 2/11頁 |
| 文件大?。?/td> | 134K |
| 代理商： | W742S819 |
W742S819
- 2 -
1. GENERAL DESCRIPTION
The W742S819 is a high-performance 4-bit micro-controller (
μ
C) that provides an LCD driver and
three OpAmps. The device contains a 4-bit ALU, two 8-bit timers, two dividers (for two oscillators) in
dual-clock operation, a 24
×
8 LCD driver, six 4-bit I/O ports (including 1 output port for LED driving),
three OpAmps(Operational Amplifiers), and one channel DTMF generator. There are also five interrupt
sources and 16-levels subroutine nesting for call subroutine or interrupt applications. The W742S819
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
y
Operating voltage: 2.4V - 5.5V
y
Dual-clock operation mode (Connect to 32768 Hz crystal only)
Fslow oscillator : 32768Hz OSC
Ffast oscillator : PLL ( Phase Lock Loop ) output enable
y
Memory
12288 x 16 bits program ROM (including 48K x 4 bit look-up table)
1536 x 4 bits data RAM (including 16 nibbles x 16 pages working registers)
24 x 8 LCD data RAM
y
24 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)
Port for output only: 1 ports/4 pins(RF)
y
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 32768Hz (FOSC=Fslow and Ffast
stopped)
y
Five types of interrupts
Four internal interrupts (Divider0, Divider1, Timer 0, Timer 1)
One external interrupts (RC Port)
y
LCD driver output
24 segments x 8 commons
1/8 duty, 1/3 bias driving mode by option code
16 level software LCD contrast adjusting
y
MFP output pin
Output is software selectable as modulating or non-modulating frequency
Works as frequency output specified by Timer 1
y
DTMF output pin (PLL should be enable in this function)
Output is one channel Dual Tone Multi-Frequency signal for dialing
y
Three OpAmps(Operational Amplifiers)
Three general purpose OpAmps with positive inputs, negative inputs and outputs.
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