- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄363894 > W742E813 (WINBOND ELECTRONICS CORP) 4-BIT MICROCONTROLLER PDF資料下載
參數(shù)資料
| 型號(hào)： | W742E813 |
| 廠商： | WINBOND ELECTRONICS CORP |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | 4-BIT MICROCONTROLLER |
| 中文描述： | 4-BIT, FLASH, 3.58 MHz, MICROCONTROLLER, PQFP100 |
| 封裝： | 14 X 20 MM, 2.75 MM HEIGHT, QFP-100 |
| 文件頁數(shù)： | 32/45頁 |
| 文件大小： | 567K |
| 代理商： | W742E813 |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁第9頁第10頁第11頁第12頁第13頁第14頁第15頁第16頁第17頁第18頁第19頁第20頁第21頁第22頁第23頁第24頁第25頁第26頁第27頁第28頁第29頁第30頁第31頁當(dāng)前第32頁第33頁第34頁第35頁第36頁第37頁第38頁第39頁第40頁第41頁第42頁第43頁第44頁第45頁
Preliminary W742E81A/W742C81A
- 32 -
6.22 LCD Controller/Driver
The W742E81A/W742C81A can directly drive an LCD with 40 segment output pins and 4 common
output pins for a total of 40
×
4 dots. The LCD driving mode is 1/3 bias 1/4 duty. 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 6-14.
Q1
Q2
Q3
Q4
Q5
Q6
Q7
Q8
Q9
Fw
Selector
Fw/512
Fw/256
Fw/128
Fw/64
Fs or Fosc/128
(By Dual or single
clock Option)
F
LCD
Figure 6-14 LCD alternating frequency (FLCD) circuit diagram
Fw = 32.768 KHz, the LCD frequency is as shown in the table below.
Table 6 The relationship between the FLCD and the duty cycle
LCD FREQUENCY
1/4 DUTY
Fw/64 (512Hz)
128 Hz
Fw/128 (256Hz)
64 Hz
Fw/256 (128Hz)
32 Hz
Fw/512 (64Hz)
16 Hz
Corresponding to the 40 LCD drive output pins, there are 40 LCD data RAM segments. Instructions
such as MOV LPL,R, MOV LPH,R, MOV @LP,R, and MOV R,@LP are used to control the LCD data
RAM. The data in the LCD data RAM are transferred to the segment output pins automatically without
program control. When the bit value of the LCD data RAM is "1," the LCD is turned on. When the bit
value of the LCD data RAM is "0," LCD is turned off. The contents of the LCD data RAM (LCDR) are
sent out through the segment0 to segment39 pins by a direct memory access. The relation between
the LCD data RAM and segment/common pins is shown below.
Table 7 The reation between the LCDR and segment/common pins used as LCD drive output pins
COM3
COM2
COM1
COM0
LCD DATA RAM
OUTPUT PIN
BIT 3
BIT 2
BIT 1
BIT 0
LCDR00
SEG0
0/1
0/1
0/1
0/1
LCDR01
SEG1
0/1
0/1
0/1
0/1
:
:
:
:
:
:
:
:
:
:
:
:
LCDR26
SEG38
0/1
0/1
0/1
0/1
LCDR27
SEG39
0/1
0/1
0/1
0/1
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| W742C81A | 4-BIT MICROCONTROLLER |
| W742S819 | 4-BIT TELEPHONE CONTROLLER |
| W742S81A | 4-BIT SINGLE-CHIP MICROCONTROLLER FOR SMALL GENERAL-PURPOSE INFRARED REMOTE CONTROL TRANSMITTER |
| W742S82A | 4-BIT TELEPHONE CONTROLLER |
| W74IE20X | 4-BIT FLASH MICROCONTROLLER |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| W742E816 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Microcontroller |
| W742E81A | 制造商:WINBOND 制造商全稱:Winbond 功能描述:4-BIT MICROCONTROLLER |
| W742S819 | 制造商:WINBOND 制造商全稱:Winbond 功能描述:4-BIT TELEPHONE CONTROLLER |
| W742S81A | 制造商:WINBOND 制造商全稱:Winbond 功能描述:4 BIT MICROCONTROLLER |
| W742S82A | 制造商:WINBOND 制造商全稱:Winbond 功能描述:4-BIT TELEPHONE CONTROLLER |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。