4d Systems 7.0" DIABLO16 Intelligent Display $LCD-70DT uLCD-70DT データシート

製品コード

uLCD-70DT

4D SYSTEMS uLCD-70DT Display Module

uLC

-7

spl

4. Hardware Interface - Pins

The uLCD-70DT Module provides both a hardware
and software interface. This section describes in
detail the hardware interface pins of the device.

Serial Ports – TTL Level Serial

4.1.

The  DIABLO16  Processor  has  three  hardware
asynchronous  serial  ports  (COM1  –  COM3)  that
can  be  configured  on  a  variety  of  the  processors
GPIO  pins.  TX/RX0  (COM0)  is  dedicated  and  its
pins  are  fixed.  All  of  the  DIABLO16’s  serial  ports
can  be  used  to  communicate  with  external  serial
devices.

TX/RX0 are referred to as COM0, and is the only
one used for programming the DIABLO16 itself.

The primary features are:



Full-Duplex 8 bit data transmission and
reception.



Data format: 8 bits, No Parity, 1 Stop bit.



Independent Baud rates from 300 baud
up to 600K baud.



Single  byte  transmits  and  receives  or  a
fully  buffered  service.  The  buffered
service  feature  runs  in  the  background
capturing  and  buffering  serial  data
without  the  user  application  having  to
constantly poll any of the serial ports. This
frees  up  the  application  to  service  other
tasks.

A  single  byte  serial  transmission  consists  of  the
start  bit,  8-bits  of  data  followed  by  the  stop  bit.
The start bit is always 0, while a stop bit is always
1.  The  LSB  (Least  Significant  Bit,  Bit  0)  is  sent  out
first  following  the  start  bit.  Figure  below  shows  a
single byte transmission timing diagram.

COM0 is also the primary interface for 4DGL user
program downloads and chip configuration PmmC
programming.

Once

the

compiled

4DGL

application

program

(EVE

byte-code)

downloaded  and  the  user  code  starts  executing,
the  serial  port  is  then  available  to  the  user
application. Refer to Section 5 for more details on
PmmC/Firmware programming.

TX0 pin (Serial Transmit COM0):
Dedicated  Asynchronous  Serial  port  COM0
transmit  pin,  TX0.  Connect  this  pin  to  external
serial  device  receive  (Rx)  signal.  This  pin  is  5.0V
tolerant.

RX0 pin (Serial Receive COM0):
Dedicated Asynchronous Serial port COM0 receive
pin, RX0. Connect this pin to external serial device
transmit (Tx) signal. This pin is 5.0V tolerant.

TX1 pin (Serial Transmit COM1):
Asynchronous Serial port COM1 transmit pin, TX1.
Connect  this  pin  to  external  serial  device  receive
(Rx)  signal.  This  pin  is  5.0V  tolerant.  This  can  be
configured to 1 of the GPIO pins, see table below.

RX1 pin (Serial Receive COM1):
Asynchronous  Serial  port  COM1  receive  pin,  RX1.
Connect this pin to external  serial device transmit
(Tx)  signal.  This  pin  is  5.0V  tolerant.  This  can  be
configured to 1 of the GPIO pins, see table below.

TX2 pin (Serial Transmit COM2):
Asynchronous Serial port COM2 transmit pin, TX2.
Connect  this  pin  to  external  serial  device  receive
(Rx)  signal.  This  pin  is  5.0V  tolerant.  This  can  be
configured to 1 of the GPIO pins, see table below.

RX2 pin (Serial Receive COM2):
Asynchronous  Serial  port  COM2  receive  pin,  RX2.
Connect this pin to external  serial device transmit
(Tx)  signal.  This  pin  is  5.0V  tolerant.  This  can  be
configured to 1 of the GPIO pins, see table below.

TX3 pin (Serial Transmit COM3):
Asynchronous Serial port COM3 transmit pin, TX3.
Connect  this  pin  to  external  serial  device  receive
(Rx)  signal.  This  pin  is  5.0V  tolerant.  This  can  be
configured to 1 of the GPIO pins, see table below.

RX3 pin (Serial Receive COM3):
Asynchronous  Serial  port  COM3  receive  pin,  RX3.
Connect this pin to external serial device transmit
(Tx)  signal.  This  pin  is  5.0V  tolerant.  This  can  be
configured to 1 of the GPIO pins, see table below.