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W742E816

Features: · Operating voltage- 2.4V - 6.0V for mask type- 2.4V - 4.8V for EEPROM type· Dual-clock operation· Main oscillator- 3.58 MHz or 400 KHz can be selected by code option- Crystal or RC oscillator can be selected by code option· Sub-oscillator- Connect to 32.768 KHz crystal only· Memory- 327...

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SeekIC No. : 004544950 Detail

W742E816: Features: · Operating voltage- 2.4V - 6.0V for mask type- 2.4V - 4.8V for EEPROM type· Dual-clock operation· Main oscillator- 3.58 MHz or 400 KHz can be selected by code option- Crystal or RC oscill...

W742E816 Data Sheet

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Part Number:
W742E816
Supply Ability:
5000

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  • 1~5000
  • Unit Price
  • Negotiable
  • Processing time
  • 15 Days
Total Cost: $ 0.00

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Upload time: 2024/11/20

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Product Details

Description



Features:

· Operating voltage
- 2.4V - 6.0V for mask type
- 2.4V - 4.8V for EEPROM type
· Dual-clock operation
· Main oscillator
- 3.58 MHz or 400 KHz can be selected by code option
- Crystal or RC oscillator can be selected by code option
· Sub-oscillator
- Connect to 32.768 KHz crystal only
· Memory
- 32768(32K) x 16 bit program ROM (including 64K x 4 bit look-up table)
- 5120(5K) x 4 bit data RAM (including 16 nibbles x 16 pages working registers)
- 40 x 16 LCD data RAM
· 40 input/output pins
- Port for input only: 3 ports/12 pins
- Input/output ports: 3 ports/12 pins
- High sink current output port for LED driving: 2 port /8 pins
- DC output port: 2 ports/ 8 pins (selected by code option)
· Power-down mode
- Hold mode: no operation (main oscillator and sub-oscillator still operate)
- Stop mode: no operation (main oscillator and sub-oscillator are stopped)
- Slow mode: main oscillator is stopped, system is operated by the sub-oscillator (32.768 KHz)
· Eleven interrupt sources
- Four internal interrupts (Divider0, Divider1, Timer 0, Timer 1)
- Seven external interrupts (RC.0 - 3, P1.2 (INT0 ), Serial Port, P1.3 (INT1))
· LCD driver output
- 40 segments x 16 commons
- 1/8 or 1/16 duty (selected by code option) 1/5 bias driving mode
- Clock source should be the sub-oscillator clock in the dual-clock operation mode
- 8 level software LCD contrast adjusting
- LCD operating voltage source could come from VDD or VLCD1 pin input
· MFP output pin
- Output is software controlled to generate modulating or non-modulating frequency
- Works as frequency output specified by Timer 1
- Key tone generator
· DTMF output pin
- Output is one channel Dual Tone Multi-Frequency signal for dialing
· FSK output
- Output FSK signal of CCITT V.23 or Bellcore 202 by mask option
· 8-bit Serial I/O Interface
- 8-bit transmit/receive mode by internal or external clock source
· Two built-in 14-bit frequency dividers
- Divider0: the clock source is the main oscillator (FOSC)
- Divider1: the clock source is the sub-oscillator (Fs)
· 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: with auto-reload function and one of two internal clock frequencies (FOSC or FOSC/64 or Fs) can be selected (signal output through MFP pin)
· Built-in 18/14-bit watchdog timer selectable for system reset, enable/disable by code option
· 16-level stack buffer
· Packaged in 100-pin QFP


Pinout

Connection Diagram


Description

The W742E/C816 [W742E 816 is EEPROM type, W742C816 is mask type] is a high-performance 4- bit microcontroller (mC) that built in 640-dot LCD driver. The device contains a 4-bit ALU, two 8-bit timers, two dividers in dual-clock operation, a 40 ´ 16 LCD driver, ten 4-bit I/O ports (including 2 output port for LED driving), multiple frequency output, one channel DTMF generator and FSK modulator of CCITT V.23 or Bellcore 202. There are also eleven interrupt sources and 16-level stack buffer. The W742E/C816 operates on very low current and has three power reduction modes, hold mode, stop mode and slow mode, which help to minimize power dissipation.




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