Remote-processing RPC-2350 Manuel d'utilisateur télécharger pdf (Page 53)

DISPLAY PORTS CHAPTER 10

10-2

It is possible to write a LCD character driver in Basic.

This routine will be slow and take up some space.

DISPLAY CONNECTOR PIN OUT

The display port uses an 82C5 5 for data and contr ol.

The table below lists a pin number and its intended

function. A display may not use all lines even though

they are available.

J6 Pin 82C55

Port/Line

Function WR T display

(LCD d isplays)

1 + 5V supply

2 Ground

3 A/4 ~RS

4 Contrast Voltage

5 A/6 E1

6 A/5 R/~ W

7 No connect

8 No connect

9 No connect

10 A/7 E2

11 A/1 DB5

12 A/0 DB4

13 A/3 DB7

14 A/2 DB6

15-20 No connect

The ~ character designates a logical NOT.

LCD character displays operate in 4 bit mode. Display

lines DB0-DB3 are not connected.

J6 Pin 82C55

Port/Line

Function WR T display

(VF displays)

1 + 5V supply*

2 Ground*

3 A/4 D4

4 No connect

5 A/6 D6

6 A/5 D5

7 No connect

8 No connect

9 No connect

10 A/7 Strobe

11 A/1 D1

12 A/0 D0

13 A/3 D3

14 A/2 D2

15-20 No connect

VF character display connector table. Displays operate

in 8 bit mode. Bring bit 7 on display to ground.

Display bit 7 is not used.

*NOTE: Due to high display current dem and, it is

recommended that separate + 5 and ground

lines be brought to the display.

COMMANDS

The following is a list of commands used to control the

displays.

Command Function

CONFIG DISPLAY Tells system type of

display and initializes it.

DISPLAY Core comm and to wr ite

to display for printing

and positioning.

CONFIG PIO Initializes digital port

1 2 ... 48 49 50 51 52 53 54 55 56 57 58 ... 82 83

Commentaires sur ces manuels

Pas de commentaire

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