Glcd 128X64 - mikroElektronika EasyAVR v7 User Manual

GLCD 128x64

Graphical Liquid Crystal Displays, or GLCDs are used to display
monochromatic graphical content, such as text, images, human-
machine interfaces and other content. EasyAVR
the connector and necessary interface for supporting GLCD with
resolution of 128x64 pixels, driven by the KS108 or compatible
display controller. Communication with the display module is
done through CN16 display connector. Board is fitted with
uniquely designed plastic display distancer, which allows the
GLCD module to perfectly and firmly fit into place.
Figure 11-1: GLCD 128x64
connection schematic
P4
10K
VCC-5V
1
EasyAVR
v7
Display connector is routed to PB0, PB1, PA2,
PA3, PD6, PD7 (control lines) and PORTC (data
v7 provides lines) of the microcontroller sockets. Since the
™
same ports are used by 2x16 character LCD display,
you cannot use both displays simultaneously. You
can control the display contrast using dedicated
potentiometer P4. Full brightness display back light
can be enabled with SW3.1 switch, and PWM-driven
back light with SW3.2 switch.
BCK LIGHT
BCK PWM
Connector pinout explained
VCC-BRD
R34
CS1 and
Q5
20
R36
VCC - +5V display power supply
BC846
1K
R37 GND - Reference ground
Vo
4K7 - GLCD contrast level from potentiometer P4
RS
- Data (High), Instruction (Low) selection line
R/W - Determines whether display is in Read or
CN16
Write mode.
GLCD-TFT SOCKET2
20
Standard and PWM-driven back-light
As for LCD, we have allowed GLCD back-light to be enabled in two
different ways:
1. It can be turned on with full brightness using SW3.1 switch.
2. Brightness level can be determined with PWM signal from the
microcontroller, allowing you to write custom back-light controlling
software. This back-light mode is enabled with SW3.2 switch.
IMPORTANT:
DATA BUS
SW3
VCC-5V
PD5
CS2 - Controller Chip Select lines
In order to use PWM back-light both SW3.1 and SW3.2 switches must
be enabled at the same time.
E - Display Enable line
D0–D7 - Data lines
RST - Display reset line
Vee
- Reference voltage for GLCD contrast
potentiometer P3
LED+ - Connection with the back-light LED anode
LED- - Connection with the back-light LED cathode
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