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TC35 / TC37 Hardware Interface Description

TC35_37_HD_02_V03.10 - Released Page 41 of 92 21.12.2001

The data interface is configured for 8 data bits, no parity and 1 stop bit, and can be operated

at bitrates from 300bps to 115kbps. Autobauding supports bit rates from 4.8kbps to 115kbps

(except for 14.4kbps and 28.8kbps). Hardware handshake using the RTS0 / CTS0 signals

and XON/XOFF software flow control are supported.

In addition, the modem control signals DTR0

, DSR0, DCD0 and RING0 are available. The

modem control signal RING0 (Ring Indication) can be used to indicate, to the cellular device

application, that a call or Unsolicited Result Code (URC) is received. There are different

modes of operation, which can be set with AT commands.

The DTR0 signal will only be polled once per second from the internal firmware of

TC35/TC37.

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Real Time Devices GSM35 Especificaciones Pagina 41