Remote Processing RPC-2350 - Manual (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 displa y 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 char acter displays operate in 4 bit mode. D isplay
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 D 4
4 No connect
5 A / 6 D 6
6 A / 5 D 5
7 No connect
8 No connect
9 No connect
10 A / 7 Strobe
11 A / 1 D 1
12 A / 0 D 0
13 A / 3 D 3
14 A / 2 D 2
15-20 No connect
VF c haracte r display co nnector table. Displays op erate
in 8 bit mode. Bring bit 7 on display to ground.
Display bit 7 is not used.
*NOTE: Due to hig h display cur rent dem and, it is
recomm ended 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 initialize s it.
DISPLAY Cor e comm and to wr ite
to display for printing
and positioning.
CON FIG PIO Initializes digital port