Datasheet

4D SYSTEMS uLCD-220RD Display Module
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uLCD-220RD Display Module
5. PmmC/Firmware Programming
The DIABLO16 processor is a custom graphics
processor. All functionality including the high level
commands are built into the chip. This chip level
configuration is available as a PmmC (Personality-
module-micro-Code) file, which can be likened to
traditional Firmware. There is also a Display Driver
file, which separates specific display settings from
the PmmC, unlike on the PICASO processor where
everything is combined.
A PmmC file contains all of the low level micro-
code information (analogy of that of a soft silicon)
which define the characteristics and functionality
of the device. The ability of programming the
device with a PmmC file provides an extremely
flexible method of customising as well as
upgrading it with future enhancements.
The Display Driver contains the initialisation and
parameters associated with the particular display
that is to be connected to the DIABLO16
processor.
The PmmC file and Display Driver file can only be
programmed into the device via the COM0 serial
port with the aid of Workshop 4, the 4D Systems
IDE software.
Using a non-4D programming interface could
damage your module, and void your Warranty.
6. Module Features
The uLCD-220RD module is designed to
accommodate most applications. Some of the
main features of the module are listed below.
Display – 1.38” Round TFT Screen 6.1.
The uLCD-220RD module is equipped with a 1.38”
Round TFT display. Details of the display are listed
below:
 Screen Size: 1.38” diameter, 220x220 resolution,
65K colours
 Screen Dimensions: 42.4 x 46.9 x 2.5mm
 Active Viewing Area: 35.1mm Diameter circle
 Pixel Pitch: 0.156(H) x 0.156(V)mm
 Brightness: 171cd/m2
 Contrast Ratio: 355:1
 Viewing Angle Above Centre: 61 degrees
 Viewing Angle Below Centre: 64 degrees
 Viewing Angle Left of Centre: 71 degrees
 Viewing Angle Right of Centre: 73 degrees
 Viewing Direction: 6 O'clock
 2 Parallel LEDs for Backlighting
Note: The Displays used are the highest rated
‘Grade A’ Displays, which allow for 0-4 defective
pixels. A defective pixel could be solid Black
(Dead), White, Red, Green or Blue.
DIABLO16 Processor 6.2.
The module is designed around the DIABLO16
Graphics Controller from 4D-Labs.
The DIABLO16 is a smart Controller and the
interface to the TFT- LCD displays is almost plug-n-
play.
All of the data and control signals are provided by
the chip to interface directly to the display.