PICASO-OGM Datasheet, PDF (8/22 Pages) List of Unclassifed Manufacturers – OEM Graphics Module

4D SYSTEMS
4.3. System Pins
RAW+3.3V (Module Voltage Input)
Pin 50:
Module supply voltage input pin. This pin must be
connected to a stable and regulated supply
voltage in the range of 3.3 Volts to 3.6 Volts DC.
Nominal operating voltage is 3.3 Volts. Anything
less than 3.3V could result in SD card
corruption/errors (brand/model dependant).
RAW+VCC (Backlight Voltage Input)
Pin 52:
Backlight supply voltage input pin. This pin must
be connected to a stable and regulated supply
voltage in the range of 3.3 Volts to 5.5 Volts DC.
Nominal operating voltage is 5.0 Volts. This will
ensure optimal backlight brightness.
GND (Module Ground)
Pins 2-8, 16-18, 21, 25-26, 29-31, 34-35, 44, 51,
53-54:
Device ground pins which are all joined on the
OGM Module. These pins must be connected to
ground.
Note: Not ALL are required to be connected,
however where possible, connect as many as
possible to GND.
RESET (Module Master Reset)
Pin 22:
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)
Pin 32:
Output dedicated to enable or disable an external
amplifier, where required.
AUDIO (Raw PWM Audio Output)
Pin 33:
This pin outputs a raw PWM from the PICASO
Processor, designed to be connected to external
components for filtering and amplification (where
required). When used in conjunction with AUDENB
this pin can be used to feed PWM signals to a
filtering and amplifier, and the AUDENB can enable
or disable the amplifier as required.
FMARK (Frame Mark Output)
Pin 1:
This pin is not connected to the PICASO Processor,
it comes directly from the LCD and can be used if
required, and is used to detect the start of a
PICASO OGM Module
Frame. If this is required, simply connect it
externally to one of the GPIO pins, and use as
required.
CD POL (SD Card Detect POL)
Pin 9:
This pin is side 1 of a simple switch located on the
on-board microSD card connector. It is not
connected to the PICASO Processor, and may be
connected to external components or back onto
one of the OGM GPIO pins as required. Used in
conjunction with CD DET, if one is pulled up to
3.3V, and the other to a GPIO pin configured as an
Input, then when a card is inserted the 3.3V will be
detected on the GPIO Input, and an action can be
undertaken, as required.
CD DET (SD Card Detect DET)
Pin 10:
This pin is side 2 of a simple switch located on the
on-board microSD card connector. It is not
connected to the PICASO Processor, and may be
connected to external components or back onto
one of the OGM GPIO pins as required. Used in
conjunction with CD POL, if one is pulled up to
3.3V, and the other to a GPIO pin configured as an
Input, then when a card is inserted the 3.3V will be
detected on the GPIO Input, and an action can be
undertaken, as required.
SD_CS (SD Card Chip Select)
Pin 11:
This is for SD memory card use only. Connect this
pin to the Chip Enable (CS) signal of an external SD
card connector if not using the on-board
connector, providing flexibility for the end
product. Using both on-board and external SD is
not advised. Leave Open if external SD is N/A.
SD_SDO (SD Serial Data Output)
Pin 12:
This is for SD memory card use only. Connect this
pin to the Serial Data Out (SDO) signal an external
SD card connector if not using the on-board
connector, providing flexibility for the end
product. Using both on-board and external SD is
not advised. Leave Open if external SD is N/A.
SD_SCK (SD Serial Clock Output)
Pin 13:
This is for SD memory card use only. Connect this
pin to the Serial Data Clock (SCK) signal an external
SD card connector if not using the on-board
connector, providing flexibility for the end
product. Using both on-board and external SD is
not advised. Leave Open if external SD is N/A.
© 2013 4D SYSTEMS
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