4DISCOVERY-50W datasheet(7/43 Pages) 4DSYSTEMS

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Wall Mountable Display Solution

4Discovery-50

Page 7 of 43

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4.2. DB02 Pin Configuration

I = Input, O = Output, P = Power

Secondary Model (using DB02) – PORT 1

Symbol

I/O

Description

VIN

7.0V to 30VDC Input. Recommended range is 12V to 24V. This is the primary

power source of the 4Discovery.

RX0

I/O

Connected to the Diablo16 RX0 port, UART Receive, used for Programming

Diablo16, but also for communications to external devices. This pin is 5V

tolerant but operated at 3.3V logic levels.

TX0

I/O

Connected to the Diablo16 TX0 port, UART Transmit, used for Programming

Diablo16, but also for communications to external devices. This pin outputs at

3.3V levels but is compatible with 5V logic systems.

GND

System Ground, relevant to VIN and 5V_IN

GND

System Ground, relevant to VIN and 5V_IN

5V_IN

5.0VDC Input. This is typically only used to power the 4Discovery during

programming, however it can be used to power the 4Discovery if a higher

voltage power source into VIN is not available. Should be in the range of 4.5V to

5.5V, nominal 5.0V. Please see relevant section on System Pins. Take note of

voltage drop across long cables, and the current requirements of the module,

especially when powering off 5V.

RESET

Reset signal used for programming the 4Discovery over the UART. Can be used

by an external device if the 4Discovery needs to be reset. Active Low.

GPIO

This GPIO is connected to Diablo16 pin PA4. Please refer to the Diablo16

Processor datasheet for specific information on the capabilities of this GPIO.

Secondary Model (using DB02) – PORT 2

Symbol

I/O

Description

VIN

7.0V to 30VDC Input. Recommended range is 12V to 24V. This is the primary

power source of the 4Discovery.

RS232-TX

I/O

This is connected to the Transmit output of the RS232 transceiver, and is

controlled by Diablo16 pin PA1

RS232-RX

I/O

This is connected to the Receive input of the RS232 transceiver, and sends its

data to the Diablo16 pin PA3

GND

System Ground, relevant to VIN and 5V_IN

GND

System Ground, relevant to VIN and 5V_IN

5V_IN

5.0VDC Input. This is typically only used to power the 4Discovery during

programming, however it can be used to power the 4Discovery if a higher

voltage power source into VIN is not available. Should be in the range of 4.5V to

5.5V, nominal 5.0V. Please see relevant section on System Pins. Take note of

voltage drop across long cables, and the current requirements of the module,

especially when powering off 5V.

I2C SDA

(or GPIO)

This pin is connected to Diablo16 pin PA13, and features in internal pullup

resistor of 4.7Kohm. This pin can be used as an I2C SDA pin, a GPIO, or it could

also function as another hardware serial UART. Please refer to the Diablo16

Processor datasheet for specific information on the capabilities of this GPIO.

I2C SCL

(or GPIO)

This pin is connected to Diablo16 pin PA12, and features in internal pullup

resistor of 4.7Kohm. This pin can be used as an I2C SCL pin, a GPIO, or it could

also function as another hardware serial UART. Please refer to the Diablo16

Processor datasheet for specific information on the capabilities of this GPIO.

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