Technical data

4.11.1.1 Serial Data Signals (DTM1, DFM1)
The default baud rate of the UARTs is auto-baud. Baud rates of between 600 bauds
to 460k bauds are possible. The Wireless CPU® also supports 3GPP TS 27.010
multiplexing protocol, which starts when the appropriate command is sent.
4.11.1.1.1 Serial Data From Wireless CPU® (DFM1)
DFM1 is an output signal that the Wireless CPU® uses to send data via UART1 to the
host application.
4.11.1.1.2 Serial Data To Wireless CPU® (DTM1)
DTM1 is an input signal, used by the application to send data via UART1 to the
Wireless CPU®.
4.11.1.2 Control Signals (RTS1, CTS1)
RTS and CTS provide a hardware flow control mechanism.
4.11.1.2.1 Request to Send (RTS1)
RTS is used to condition the DCE for data transmission. The default level is high by
internal pull up. The application must pull RTS low to enable data transmission from
the Wireless CPU®. Similarly, the Wireless CPU® asserts CTS low, indicating it is ready
to receive data transmission from the host.
4.11.1.2.2 Clear To Send (CTS1)
CTS is asserted by the DCE to indicate that the host (DTE) may transmit data. When
CTS is high, the host (DTE) is not permitted to transmit data. The table below shows
the load characteristics for this signal.
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GR64 Integrators’ Manual
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