Remote Processing RPC-330 - Manual (Page 32)

DISPLAY PORT SECTION 8
Page 8-2 RPC-330
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.
J4 8255 Function
Pin Port/line to display
1 Logic + 5V
2 Digital ground
3 A / 4 D 4
4 Contrast voltage
5 A / 6 D 6
6 A / 5 D 5
7 B/4 Reset (from invertor)
8 B/3 Write
9 B/2 Read
10 A / 7 D 7
11 A / 1 D 1
12 A / 0 D 0
13 A / 3 D 3
14 A / 2 D 2
15 B/7 CS (from invertor)
16 B/6 Com mand/ data
17 B/5 Halt
18 Contrast adjust
19 Alternate power
20 Power gr ound
J4 is available for additional I/O if a display
is not used. Port A m ay be configured as an input or
output. Port B must be configured as an output if a 17
key or larger keypad is used. Use the LINE B command
to access this par t.
Pins 18, 19, and 20 are for the LCD -5003 and other
graphic displays. These lines go to P5.
COMMANDS
The following RPBASIC-52 com mands are used for the
display.
Comm and Function
CLEAR DISPLAY Clears entire display
C L E A R D IS P L A Y LI N E Clears curr ent line
CONFIG DISPLAY
Specifies display type to
use
DISPLAY Prints the string at the
row and collum specified