Datasheet
4D SYSTEMS µVGA-III
© 2012 4D SYSTEMS Page 8 of 19 www.4dsystems.com.au
microVGA – VGA GRAPHICS ENGINE
IO5/BUS_WR pin (GPIO IO5 or BUS_WR pin):
General Purpose IO5 pin. Also used for BUS_WR
signal to write and latch the data to the parallel
GPIO BUS0..BUS7.
BUS0-BUS7 pins (GPIO 8-Bit Bus):
8-bit parallel General purpose I/O Bus.
Note: All GPIO pins are 5.0V tolerant.
System Pins 4.3.
+5V (Module Voltage Input)
H1 pin 14, H2 pin 10:
Module supply voltage input pin. This pin must be
connected to a regulated supply voltage in the
range of 4.0 Volts to 5.5 Volts DC. Nominal
operating voltage is 5.0 Volts.
3.3V Out (3.3V Regulated Output)
H1 pin 22:
External circuitry that requires a regulated 3.3V
supply can be powered up via this pin. Maximum
available current is 20mA.
GND (Module Ground)
H1 pin 11/13, H2 pin 4:
Device ground pins. These pins must be connected
to ground.
RESET (Module Master Reset)
H1 pin 20, H2 pin 2:
Module Master Reset pin. An active low pulse of
greater than 2μs will reset the module. Internally
pulled up to 3.3V via a 10K resistor. Only use open
collector type circuits to reset the device if an
external reset is required.
AUDENB (Audio Enable Output)
H1 pin 18:
Output dedicated to enable or disable an external
audio amplifier (if required).
AUDIO (Audio Line Level Output)
H1 pin 16:
Line Level output specifically for Audio. This pin is
for connecting to an external amplifier. When used
in conjunction with AUDENB this pin can be used
as a line-level output (AUDENB enabled is LOW) to
drive an external amplifier.
VGA Output Header and Pads 4.4.
The μVGA-III features a remote VGA connector,
which is able to be disconnected from the PCB. The
remote VGA connector enables flexible mounting
and connection options when using the μVGA-III.
Note: The orientation of the VGA cable onto the
PCB is important. The striped wire on the VGA
cable indicates Pin 10 on Header J3.
Extra Video Out pads are provided on the rear of
the PCB (J4), for added flexibility and wiring
options.
Note: The extra Video Out pads (J4) are a mirror
image to the header on the front of the PCB (J3),
so the supplied VGA cable cannot simply be
plugged in if a header is attached.