4-BIT MICROCONTROLLER The W742E81A/W742C81A is a high-performance 4-bit microcontroller (µC) 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 40 × 4 LCD driver, six 4-bit I/O ports (including 1 output port for LED driving), and one channel DTMF generator. There ar.
• Operating voltage: 2.4V−3.8V
• Dual-clock operation or single-clock operation (By option)
• Main-oscillator
− Connect to 3.58 MHz crystal or 400 KHz that can be selected by option code − Crystal or RC oscillator can be selected by code option (W742E81A) − Connect to 2 MHz typical RC.
No. | Partie # | Fabricant | Description | Fiche Technique |
---|---|---|---|---|
1 | W742E-C811 |
Winbond |
4-BIT MICROCONTROLLER | |
2 | W742E-C81A |
Winbond |
4-BIT MICROCONTROLLER | |
3 | W7422-A |
Coilcraft |
Flyback Transformer | |
4 | W742C810 |
Winbond |
4-BIT MICROCONTROLLER | |
5 | W742C81A |
Winbond |
4-BIT MICROCONTROLLER | |
6 | W740SU |
ETC |
Notebook Service Manual | |
7 | W741C20X |
Winbond |
4-BIT MICROCONTROLLER | |
8 | W741C260 |
Winbond |
4-BIT MICROCONTROLLER | |
9 | W741E20X |
Winbond |
4-BIT FLASH MICROCONTROLLER | |
10 | W741E260 |
Winbond |
4-BIT FLASH MICROCONTROLLER | |
11 | W741L250 |
Winbond |
4-BIT MICROCONTROLLER | |
12 | W741L260 |
Winbond |
4-BIT MICROCONTROLLER |