4DISCOVERY-50W datasheet(9/43 Pages) 4DSYSTEMS

9 / 43 page

Wall Mountable Display Solution

4Discovery-50

Page 9 of 43

www.4dsystems.com.au

5. Hardware Interface

The 4Discovery provides both a hardware and

software interface. This section describes in detail the

hardware interface pins of the device.

5.1. Serial Port(s)

The

4Discovery

DB01

option

provides

one

asynchronous serial port which interfaces via the

RJ45 port and communicates using the RS485

protocol.

This serial port is used for both communications to

various devices on the RS485 bus, but also for the

programming of the 4Discovery itself, using the 4D

485 Programmer.

A RS485 IC is used inside the 4Discovery, to provide

the RS485 interface, signals A and B.

The

4Discovery

DB02

option

provides

one

asynchronous serial UART, and one asynchronous

RS232 serial port. The serial UART is used for

programming the 4Discovery, however can also be

used for general communications. The UART and the

RS232 are separate buses and can be used at the

same time.

The primary features are:

•

Full-Duplex 8-bit data transmission and

reception.

•

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

•

Baud rates from 300 baud up to 250K 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. Image below shows a single byte

transmission timing diagram.

5.2. Power Pins – DB01 & DB02

VIN (Primary Voltage Input)

Pin 1:

4Discovery supply voltage input pin. This pin must be

supplied between 7.0VDC and 30VDC, and these

must not be exceeded. Typical voltages are between

12V and 24VDC. Note if long cables are used, the

minimum 7V needs to be presented at the module, so

voltage drops need to be considered. If this pin is not

used, a 5VDC source can be applied to pin 6 (5V_IN)

instead.

GND (Module Ground)

Pins 4, 5:

Device ground pins. At least one of these pins must

be connected to ground.

5V_IN (Secondary Voltage Input)

Pin 6:

4Discovery supply voltage input pin. This pin is

typically used by the 4D 485 Programmer when

programming from USB of a PC, however it can also

be used in the case a suitable voltage cannot be

applied to VIN. Supply to this pin must be between

4.5V to 5.5V DC. Nominal operating voltage is 5.0

Volts.

Note: When powering solely off 5V, the current

requirements need to be taken into consideration.

When all features are running on the 4Discovery, the

current requirement of the 5V rail must be enough

else the display may reset continuously in a loop.

Please see the specification section for current

requirements. Voltage drops across the cable need to

also be considered, and the Pin 1 (VIN) option is

recommended if cable lengths are more than a few

meters.

5.3. GPIO Pins and Connections

Internal to the 4Discovery there are components

such as the WiFi and Proximity Sensor, which are

internally connected to GPIO on the Diablo16

processor itself. This section details the connections

which can be controlled by the User, to aid in the

programming of the 4Discovery Module.

4DISCOVERY-50W bảng dữ liệu(PDF) 9 Page - 4D Systems Pty Ltd

4DISCOVERY-50W bảng dữ liệu(HTML) 9 Page - 4D Systems Pty Ltd

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43

bảng dữ liệu tải về

Link URL