User Manual

CONFIDENTIAL AND PROPRIETARY
The Information contained in this document shall remain the sole exclusive property of s.m.s smart microwave sensors GmbH and shall not
be disclosed by the recipient to third parties without prior consent of s.m.s smart microwave sensors GmbH in writing.
UMRR-0Axxxx Type32 General Purpose.docx Version 1 I Page 17 of 20 I October 4, 2012
7.4 Transceiver schematics
In Figure 9 an extract of the DSP board schematic of the UMRR is given. As can be seen in
this figure, the CAN pins of the DSP TMS320F28335 are connected to a CAN transceiver
which is connected to the pins CAN_L and CAN_H. Similarly, the RS485 pins of the DSP are
connected to a RS485 transceiver, which is connected to the pins RS_485_L and RS_485_H.
It should be noted that the mentioned pins CAN_L and CAN_H correspond to the pins 4 and
5 of the sensor connector described in section 6.1 and that the pins RS_485_L and
RS_485_H correspond to pins 1 and 3.
Figure 9: UMRR-0Axxxx DSP board schematics: CAN and RS485 transceivers