EA9777-2

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ELECTRONIC ASSEMBLY reserves

the right to change specifications

without prior notice. Printing and

typographical

errors

reserved.

PORT EXPANSION EA 9777-2PE (included in EA EVALxxx)

The optional adapter board EA 9777-2PE

expands the Evaluation board with important

interfaces:

“real“ RS232, RS232 CMOS, RS485, SPI and

I²C.

The board consists of 5 individual adapter

boards, which have to be carefully broken

asunder the perforation.

Each adapter board has two LEDs two indicate

data transfer. In addition there is a DIP-Switch.

The adapters intermit the USB connection

between Evaluation board and PC and

configures the eDIP for the desired interface.

Please make sure to reset the display every time

you change the interfaces.

To reuse the USB connection again, you have

to removethe adapter board and reset the

display.

PIN CONNECTORS OF THE BOARD IN CONNECTION WITH INTERFACE EXPANTION

The pin coennectory, you can see on the board EA 9777-2USB provide the repective interfaces.

Attention:

The following description of pin connectors are only operable if the optional

available adapter board EA9777-2PE is mounted.

External power supply (e.g. 3.3V):

If you want to run the display with an external supply, you have to set the jumper to the right as you can

see on the picture above on the right.

Please take note of the supply ranges of your eDIP.

Internal power supply:

If you want to run the display with the power of USB-Interface, you have to change the position of the

jumper to the left.

POWER SUPPLY

Supply by USB

External supply