User's Manual

6 Host connection

6.1 Serial interface: UART

The conﬁguration in factory state of the UART is 115200 baud with data format of 8 data Bits,

no parity and 1 stop Bit ("8n1"). The baud rate of the UART can be conﬁgured by means of

the UserSetting

UART_Baudrate

. The data format is ﬁxed to 8n1.

The output of characters on the serial interface runs with secondary priority. For this reason,

short interruptions may occur between the outputs of individual successive Bytes. The host

must not implement too strict timeouts between two Bytes to be able to receive packets

that have interruptions in between. Up to four full byte durations (32 Bit) delay between two

successive Bytes shall be accepted by the host.

For the direction "host to module" the host must respect byte-wise the line /RTS, which will

indicate that the next byte of the packet can be received by the module. This direction also

accepts a pause of up to four full byte durations (32Bit) delay between two successive Bytes

before discarding received content (without user notiﬁcation).