TC65 Terminal Hardware Interface Description
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TC65 Terminal_HD_V02.000b Page 29 of 65 2007-02-19
GSM Terminal (DCE)
Application (DTE)
TXD
RXD
RTS
CTS
RING
DCD
DSR
DTR
TXD0
RXD0
RTS0
CTS0
RING0
DCD0
DSR0
DTR0
TC65 Terminal is designed for use as a DCE. Based on the conventions for DCE-DTE
connections it communicates with the customer application (DTE) using the following
signals:
• Port TxD @ application sends data to TXD of TC65 Terminal
• Port RxD @ application receives data from RXD of TC65 Terminal
The RS-232 interface is implemented as a serial asynchronous 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 fixed bit rates from 300bps to 460,800bps.
Autobauding supports bit rates from 1,2bps to 460,800bps. Hardware handshake using the
/RTS and /CTS signals and XON/XOFF software flow control are supported.
In addition the modem control signals DTR, DSR, DCD and RING are available. The modem
control signal RING (Ring Indication) can be used to indicate, to the cellular device
application, that a call or Unsolicited Result Code (URC) is received.
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