EAIC202-PGH ELECTRONIC ASSEMBLY, EAIC202-PGH Datasheet - Page 2

• Manufacturer Part Number: EAIC202-PGH
• Description: Display Modules & Development Tools Graphic Con RS-232 128x64 for HD61202
• Manufacturer: ELECTRONIC ASSEMBLY

Specifications of EAIC202-PGH

• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

EA IC202
GENERAL
The EA IC202 high-level Graphics Controller links your system processor to your graphic display.
Inputs accepts a serial asynchronous RS-232 interface. The graphics controller includes complete
graph routines and various character sizes.
Programming is made by high level language graph commands; time consuming programming of
character sets and graph routines is not necessary anymore. Expenditure for developing of your
product is reduced significant and several features are gained on top of it:
- no timing problems with fast processor bus
- enough memory space (operating memory and characterset memory especially for µC)
- no time consuming graphic calculations which would slow down processor speed
Connecting to hardware is very simple. Display and main processor are connected directly. Drivers,
decoders or port modules are not required. A simple display input need 1 wire (RxD) only. 2 up to
maximal 4 external components will complete the circuit: a quartz with 2 capacitors and a reset-
capacitor. No external components are needed when you operate with 8051-compatible systems.
Clock and reset signal can be taken from main processor.
HARDWARE
Supply voltage of system is +5 Volts. Data transfer is asynchronous serial in RS-232 format at CMOS
level. Data format is set to 8 data bits, 1 stop bit and no parity. Baud rate can be selected on 3 pins
from 150 Baud up to 115200 Baud. Handshake lines RTS and CTS on board too. There is no
interpretation needed for small quantities of datas.
Data format:
Additional 8 I/O-ports are available for free usage. This may be wired as inputs or outputs on individual
desire. Possible application is switching of backpanel illumination or reading of several keys.
SOFTWARE
Programming of this High-Level graphics controller is performed by commands like i.e. "draw a
rectangular box from (0,0) to (64,15) which origins in top left hand corner of display". Therefore the
serial interface has to transmit this sequence of bytes: $52 $00 $00 $40 $0F. Characters string can
be placed precisely to the pixel. Mixing of graphic images with text elements is possible anytime.
Three different character sets are available where each of them can be zoomed by factors 2-, 3- or
4-times. The biggest character set 16x8 allows when using 4-x zoom (=64x32) a totally filled display
with letters and numbers.
TEST MODE
As long as pin 9 (RTS) is after Power-On or after Reset connected with GND, the graphics controller
is in test mode. Display shows now a marked flashing box. When
connection Pin 9 (RTS) to GND is removed, the graphics controller
returns to normal operation mode but testbox still remains visible.
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