Specifications

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.