參數(shù)資料
型號: 22505
英文描述: AMD Test Interface Port Board User's Manual? 2.62MB (PDF)
中文描述: AMD測試接口端口板用戶手冊? 2.62MB(PDF格式)
文件頁數(shù): 38/78頁
文件大小: 2691K
代理商: 22505
Test Interface Port Board User’s Manual
2-14
LCD
NOTE:
For more information about the LCD driver, refer to the Hitachi
HD44780U-II LCD Driver data sheet.
Overview
The LCD, illustrated in Figure 2-5, is a 2 x 20 character, ASCII-decoded display
for displaying text. The display can contain any type of text. Being ASCII-decoded,
the LCD enables the user to represent alphabetical characters in the display. For
example, writing 41h to a display location causes an A to appear on the LCD.
Software can only write to this display; it cannot read the data back. For information
about the I/O address locations, refer to Table 2-5 and Table 2-6.
The R67 potentiometer adjusts the contrast on the LCD. With the front of the board
facing you (the main interface connector on the right), turn the thumb wheel on
the R67 counterclockwise to dark the contrast on the LCD, making the characters
more visible. When the LCD appears to be off and the board is powered up, try
adjusting the potentiometer.
Figure 2-5. LCD Display
MDLS-20265K
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