Gemalto M2M GmbH BGS5 Manuel D’Utilisation

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3.4 RS-232 Interface

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EHSxT_BGS5T_HIO_v01

2014-02-26

Confidential / Preliminary

Page 22 of 41

The RS-232 interface is not available for EHS5T. The interface is implemented as a serial asyn-
chronous transmitter and receiver conforming to ITU-T V.24 Interchange Circuits DCE. It is 
configured for 8 data bits, no parity and 1 stop bit, and can be operated at bit rates from 
1200bps to 921kbps. Autobauding supports bit rates from 1.2kbps to 230kbps.

For more information see also 

Via RS-232 interface, the host controller controls the Java Terminals and transports data.

Figure 4:  Pin assignment RS-232 (D-sub 9-pole female)

Java Terminals are designed for use as a DCE. Based on the conventions for DCE-DTE con-
nections it communicates with the customer application (DTE) using the following signals:
•

Port TxD @ application sends data to TXD of the Java Terminals

•

Port RxD @ application receives data from RXD of the Java Terminals

Hardware handshake using the RTS and CTS signals and XON/XOFF software flow control 
are supported.

Table 11:  9-pole D-sub (female) RS-232

1

DCD

O

Data Carrier Detected

2

RXD

O

Receive  Data

3

TXD

I

Transmit Data

4

DTR

I

Data Terminal Ready 
Attention: The ignition of Java Terminals is activated via a rising 
edge of high potential (+3 ... +15 V) 

5

GND

-

Ground

6

DSR

O

Data Set Ready

7

RTS

I

Request To Send

8

CTS

O

Clear To Send

9

RING

O

Ring Indication

1

2

3

4

5

6

7

8

9