4d Systems 2.8" TFT Intelligent Display $LCD-28PTU uLCD-28PTU 데이터 시트
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uLCD-28PTU
4D SYSTEMS µLCD-28PTU
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simply connect an Input/Output to the IO2 pin on
the H1 header. When using IO2 for Battery Status,
simply leave the IO2 pin on the H1 header
disconnected, and read the status of IO2 as an
Input. (See 6.4. ‘Lithium Batteries’ for more
information).
IO3 pins (Peripheral Supply pin):
IO3 is controllable via the processor, or via the H2
Interface pin driven by an external circuit. If IO3 is
set as OUTPUT and driven HIGH the μSD and
Display are enabled, and disabled when driven LO.
Set as INPUT to use an external circuit to drive this
pin.
IO4/BUS_RD pin (GPIO IO4 or BUS_RD pin):
General Purpose IO4 pin. Also used for BUS_RD
signal to read and latch the data in to the parallel
GPIO BUS0..BUS7.
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.
the H1 header. When using IO2 for Battery Status,
simply leave the IO2 pin on the H1 header
disconnected, and read the status of IO2 as an
Input. (See 6.4. ‘Lithium Batteries’ for more
information).
IO3 pins (Peripheral Supply pin):
IO3 is controllable via the processor, or via the H2
Interface pin driven by an external circuit. If IO3 is
set as OUTPUT and driven HIGH the μSD and
Display are enabled, and disabled when driven LO.
Set as INPUT to use an external circuit to drive this
pin.
IO4/BUS_RD pin (GPIO IO4 or BUS_RD pin):
General Purpose IO4 pin. Also used for BUS_RD
signal to read and latch the data in to the parallel
GPIO BUS0..BUS7.
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
+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.
SPK-/SPK+ (External Speaker Outputs)
H1 pin 2/4 Respectively:
External Speaker Outputs, designed to drive an 8Ω
speaker to a maximum of 1.2W. These are
connected in Parallel with the on board speaker.
AUDENB (Audio Enable Output)
H1 pin 18:
Output dedicated to enable or disable an external
amplifier if the on-board amplifier is not desirable
to use. Controlled by the PICASO processor. When
AUDENB is low, the on-board Amplifier is Enabled.
When AUDENB is high, the on-board Amplifier is
Disabled.
AUDIO (Audio Line Level Input/Output)
H1 pin 16:
Universal Input or Output specifically for Audio.
This pin connects directly into the on-board
amplifier, but also with the filtered PWM output
from the PICASO Processor. This pin can be used to
input a signal into the on-board amplifier to play
audio from an external device using the on-board
amplifier, or as a line-level output to drive an
external amplifier with PICASO generated Audio.
Note that AUDENB must be enabled (low) in
PICASO for any input signal to be heard.
+/- (Lithium Battery Terminals)
P1 pins 1/2(+ve), 5/6(-ve):
These are the terminals of the Lithium Battery
connector. These are to be connected only to a
Lithium Ion or Polymer 3.7V Battery else the μLCD-
28PTU may be damaged. See Section 6.4
SPK-/SPK+ (External Speaker Outputs)
H1 pin 2/4 Respectively:
External Speaker Outputs, designed to drive an 8Ω
speaker to a maximum of 1.2W. These are
connected in Parallel with the on board speaker.
AUDENB (Audio Enable Output)
H1 pin 18:
Output dedicated to enable or disable an external
amplifier if the on-board amplifier is not desirable
to use. Controlled by the PICASO processor. When
AUDENB is low, the on-board Amplifier is Enabled.
When AUDENB is high, the on-board Amplifier is
Disabled.
AUDIO (Audio Line Level Input/Output)
H1 pin 16:
Universal Input or Output specifically for Audio.
This pin connects directly into the on-board
amplifier, but also with the filtered PWM output
from the PICASO Processor. This pin can be used to
input a signal into the on-board amplifier to play
audio from an external device using the on-board
amplifier, or as a line-level output to drive an
external amplifier with PICASO generated Audio.
Note that AUDENB must be enabled (low) in
PICASO for any input signal to be heard.
+/- (Lithium Battery Terminals)
P1 pins 1/2(+ve), 5/6(-ve):
These are the terminals of the Lithium Battery
connector. These are to be connected only to a
Lithium Ion or Polymer 3.7V Battery else the μLCD-
28PTU may be damaged. See Section 6.4