4d Systems 2.4" TFT Intelligent Display $LCD-24PTU uLCD-24PTU Scheda Tecnica
Codici prodotto
uLCD-24PTU
4D SYSTEMS µLCD-24PTU
© 2014 4D SYSTEMS Page 10 of 21 www.4dsystems.com.au
“PICASO-Processor-Datasheet-REVx.pdf”
Audio
Audio playback support in the PICASO Processor
enables the μLCD-24PTU module to play audio WAV
files stored in the micro-SD memory card. PWM and
an on-board audio amplifier with 8Ω speaker
ensure ample audio output capability. A simple
instruction enables the user to play/pause/stop
audio files while continuing the execution of the
user application code, such as display updates,
touch recognition, communications, etc. The audio
system also allows real time pitch change of audio
samples.
For a complete list of audio commands please refer
to the separate document titled:
“PICASO-4DGL-Internal-Functions.pdf”
Note: The on-board speaker is a small device
designed to project into an audio cavity. It is not
very loud by itself. To enable louder audio, it is
recommended to use a larger external 8Ω speaker.
See the ‘Hardware Interface Pins’ – ‘System Pins’
section for more information.
designed to project into an audio cavity. It is not
very loud by itself. To enable louder audio, it is
recommended to use a larger external 8Ω speaker.
See the ‘Hardware Interface Pins’ – ‘System Pins’
section for more information.
Lithium Batteries
The μLCD-24PTU module includes a battery
charging circuit suitable for Lithium Ion (LiIon) and
Lithium Polymer (LiPo) batteries, which is designed
to work only with 3.7V batteries. If anything other
than a LiIon or LiPo 3.7V battery is connected the
module could be damaged. Features current
sensing and reverse discharge protection using an
on board Lithium charge management controller.
When the Lithium battery is connected and an
external source (4.5V minimum) is connected to
either of the +5V pins, the Lithium battery will be
charged automatically. If the 5V source is
disconnected, the Lithium battery will be switched
in circuit and continue to power the module
automatically.
Charge voltage = 4.2V, Charge current = ~210mA
When running from the Lithium battery, when the
battery level drops down to ~3.7V, the Status input
(connected to IO2) into the Picaso will be triggered
indicating the battery is discharged. The display
should then be connected to an external 5V source
for charging. When the battery is at this cut off
voltage, μSD card read and write operations should
be avoided, as they may fail due to low voltage. It is
up to the User to handle the operation of the
display module when using a Lithium Battery.
voltage, μSD card read and write operations should
be avoided, as they may fail due to low voltage. It is
up to the User to handle the operation of the
display module when using a Lithium Battery.
WARNING:
There is a large range of Lithium
batteries available on the market. Some include
safety circuits built in, while others do not. Lithium
batteries can explode if short circuited,
overcharged, if they get too hot, and can leak if they
sit fully discharged for a prolonged period.
4D Systems recommends whenever Lithium
batteries are used that caution and due diligence
should be exercised to ensure the safety of the user
and nearby people. While the chances of explosion
or leakage may be minimal, 4D Systems
recommends safe practices at all times when
dealing with these batteries.
If Lithium Batteries are powering the module, it is
highly recommended to periodically monitor the
STAT pin. If the module is put to sleep, periodically
wake the module to check the STAT pin.
safety circuits built in, while others do not. Lithium
batteries can explode if short circuited,
overcharged, if they get too hot, and can leak if they
sit fully discharged for a prolonged period.
4D Systems recommends whenever Lithium
batteries are used that caution and due diligence
should be exercised to ensure the safety of the user
and nearby people. While the chances of explosion
or leakage may be minimal, 4D Systems
recommends safe practices at all times when
dealing with these batteries.
If Lithium Batteries are powering the module, it is
highly recommended to periodically monitor the
STAT pin. If the module is put to sleep, periodically
wake the module to check the STAT pin.
SD/SDHC Memory Cards
The module supports micro-
SD memory cards via the on-
board micro-SD connector.
The memory card is used for
all multimedia file retrieval
such as images, animations and movie clips. The
memory card can also be used as general purpose
storage for data logging applications. Support is
available for off the shelf micro-SD and high
capacity HC memory cards (4GB and above).
Note: A microSD card capable of SPI is a
requirement for all 4D Systems’ display modules
powered by Goldelox, Picaso or Diablo16
Processors. If a non-SPI compatible card is used, it
will simply fail to mount, or may cause intermittent
issues resulting in lock ups and crashing of the
application. Please refer to the 4D Systems website
for microSD cards offered by 4D Systems.
requirement for all 4D Systems’ display modules
powered by Goldelox, Picaso or Diablo16
Processors. If a non-SPI compatible card is used, it
will simply fail to mount, or may cause intermittent
issues resulting in lock ups and crashing of the
application. Please refer to the 4D Systems website
for microSD cards offered by 4D Systems.
FAT16
The μLCD-24PTU uses off the shelf standard
SDHC/SD/micro-SD memory cards with up to 2GB
capacity usable with FAT16 formatting. For any FAT
file related operations, before the memory card can
be used it must first be formatted with FAT16
option. The formatting of the card can be done on
any PC system with a card reader. Select the