Technologic Systems TS-7200, Руководство пользователя, Страница: 21 / 52

4.4 LCD Interface
Table 4.4a LCD Header Signals
PIN Function Comments
1 LCD 5V LCD Power
2 LCD_GND
3 LCD_RS Register select
4 Bias 620 Ohm to GND
5 LCD_EN Active high enable
6 LCD_WR# Active low write
7 LCD_D1
D0 - D7:
Buffered
bi-directional
data bus
8 LCD_D0
9 LCD_D3
10 LCD_D2
11 LCD_D5
12 LCD_D4
13 LCD_D7
14 LCD_D6
A 14-pin LCD connector is provided on the
TS-7200 for interfacing with standard
alphanumeric LCD displays. These displays
use a common controller, the Hitachi
HD44780 or equivalent. While software
written for the HD44780 works with all
displays using the controller, the cable
needed is dependent on the display used.
For most displays, a straight-through type
ribbon cable can be used. The connector on
the LCD display is typically mounted on the
backside of the display.
Warning!
Using an incorrect cable or
mounting the LCD connector on the
front-side can result in a reverse
power polarity and can damage the
LCD display. Please refer to your
LCD data sheets for in-depth
information.
Technologic Systems has available a 2x24 LCD display with software drivers for rapid
development.
Table 4.4b LCD
Header Pin-Outs
2 4 6 8 10 12 14
1 3 5 7 9
11 13
The pin-outs in the above table are not the standard given for LCD
displays. However, these pin-outs allow a standard ribbon cable to
be used when the ribbon cable is attached to the
backside of the
LCD.
Sample code is available for the LCD.
Contact Technologic Systems
for more information.
TS-7200 User's Manual Technologic Systems http://www.embeddedARM.com/
17 12/2004