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參數資料
型號: W741C240
廠商: WINBOND ELECTRONICS CORP
元件分類: 微控制器/微處理器
英文描述: 4-BIT Microcontroller(多次可編程4位的微控制器)
中文描述: 4-BIT, MROM, MICROCONTROLLER, PQFP64
封裝: QFP-64
文件頁數: 21/40頁
文件大小: 432K
代理商: W741C240
W741C240
Publication Release Date: May 1999
- 21 -
Revision A1
LCD Controller/Driver
The W741C240 can directly drive an LCD with 24 segment output pins and 4 common output pins for
a total of 24
×
4 dots. Option codes can be used to select one of five options for the LCD driving
mode: static, 1/2 bias 1/2 duty, 1/2 bias 1/3 duty, 1/3 bias 1/3 duty, or 1/3 bias 1/4 duty (see Figure
12). The alternating frequency of the LCD can be set as Fw/64, Fw/128, Fw/256, or Fw/512. The
structure of the LCD alternating frequency (F
LCD
) is shown in the figure below.
Timing
Generator
Q1
Q2
Q3
Q4
Q5
Q6
Q14
...
Fosc
Fosc/32
High frequency clock
Divider 0
Q1
Q2
Q3
Q4
Q5
Q6
Q7
Q8
Q9
Fw
Selector
Fw/512
Fw/256
Fw/128
Fw/64
Low frequency clock
F
LCD
Figure 11. LCD Alternating Frequency (F
LCD
) Circuit Diagram
LCD Data RAM
(24 x 4 bits)
Common
Driver
LCD Voltage
Controller
Segment
Driver/Controller
Data Bus
COM0 to 3
SEG0 to 23
Clock
Generator
Fw
LCD Mode
Controller
V
DH1
DH2
Option Codes
LCD Duty & Bias
LCD Frequency
Selection
LCD Drive
Mode
Selection
LCD
Waveform
V
V
F
LCD
DD
SS
DD1 to 3
Figure 12. LCD Driver/Controller Circuit Diagram
相關PDF資料
PDF描述
W741C250 4-BIT Microcontroller(多次可編程4位的微控制器)
W741C260 4-BIT Microcontroller(多次可編程4位的微控制器)
W741E20X 4-BIT FLASH MICROCONTROLLER
W741E260 4-BIT FLASH MICROCONTROLLER
W741L260 4-BIT MICROCONTROLLER
相關代理商/技術參數
參數描述
W741C250 制造商:未知廠家 制造商全稱:未知廠家 功能描述:4-Bit Microcontroller
W741C260 制造商:WINBOND 制造商全稱:Winbond 功能描述:4-BIT MICROCONTROLLER
W741E200 制造商:未知廠家 制造商全稱:未知廠家 功能描述:4-Bit Microcontroller
W741E201 制造商:WINBOND 制造商全稱:Winbond 功能描述:4-BIT FLASH MICROCONTROLLER
W741E202 制造商:WINBOND 制造商全稱:Winbond 功能描述:4-BIT FLASH MICROCONTROLLER