4d Systems 3.5" TFT Intelligent Display Module $LCD-35DT uLCD-35DT Data Sheet
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Product codes
uLCD-35DT
4D SYSTEMS uLCD-35DT Display Module
© 2014 4D SYSTEMS Page 10 of 24 www.4dsystems.com.au
uLC
D
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DT
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System Pins
4.4.
+5V (Module Voltage Input)
H1 Pin 14, H2 Pin 1, P1 Pin 1:
Module supply voltage input pin. One of these
pins must be connected to a stable supply voltage
in the range of 4.0 Volts to 5.5 Volts DC. Nominal
operating voltage is 5.0 Volts. Note backlight
brightness will be lower for voltages under 5.0V.
3.3V_OUT (3.3V Output)
H1 Pin 22, P1 Pin 2:
3.3V Output for the user, limited to approximately
100mA. Used for powering small external devices
or components.
GND (Module Ground)
H1 Pins 11 & 13, H2 Pin 7, P1 Pin 3:
Device ground pins. At least one of these pins
must be connected to ground.
RESET (Module Master Reset)
H1 Pin 20, H2 Pin 9, P1 Pin 10:
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)
H1 Pin 18, P1 Pin 9:
Pin used to enable/disable the on-board amplifier,
or to control an external amplifier. Pin can be
controlled from the Diablo16 or driven directly.
Active Low to power the on-board amplifier.
AUDIO (Audio Input/Output)
H1 Pin 16, P1 Pin 8:
This pin outputs Audio from the DIABLO16
Processor to either the on-board amplifier or to an
external amplifier, or can be used to receive
external audio to be played on the on-board
amplifier. Use Jumper J1 to control its use. Used in
conjunction with the AUDENB signal automatically
by the Diablo Processor. Refer to the Schematic
diagram to see the 3 viable positions of the J1
Jumper.
Alternate Pin Funtions - Overview
Most of the GPIO pins have an alternate function
other than being for General Purpose I/O.
GPIO pins can be configured to be SPI, I
2
C, Serial or
a range of other functions.
Note: Not all pins however can be configured to
be any of the alternate pin functions.
Please refer to the following tables which illustrate
which pins can be associated alternative functions.
The following table illustrates which of the GPIO
can be used for the four different I/O Support
Functions.
Note: Once a pin is allocated to an alternate
function, another pin cannot also be allocated to
the same alternate function.
function, another pin cannot also be allocated to
the same alternate function.
Please refer to the separate document titled
'DIABLO16-4DGL-Internal-Functions.pdf' for more
information on how to set the alternate pin
configurations.
The Alternate pin functions have been broken up
into a few tables for simplification. There are
communication based functions, and I/O support
based functions.
Further information is available in the next
sections for each of the alternative pin functions.
Note: Quadrature In requires 2 Pins
The following table illustrates which of the GPIO
can be used for the three different SPI channels
available.
can be used for the three different SPI channels
available.
DIABLO16 Alternate Pin Configurations
I/O Support Functions
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PA0
✓
✓
PA1
✓
✓
PA2
✓
✓
PA3
✓
✓
PA4
✓
✓
✓
✓
PA5
✓
✓
✓
✓
PA6
✓
✓
✓
✓
PA7
✓
✓
✓
✓
PA8
✓
✓
✓
✓
PA9
✓
✓
✓
✓
PA10
✓
PA11
✓
PA12
✓
PA13
✓
PA14
PA15