Pin 27 and 28 must be left open.
Last Update: August 8, 2017
December 20, 2016 2139 RC232 Q&A
Related Knowledge Base Posts -
- [RC232] In order to save costs, the customer need to make a only one board that can accept the different devices: RC1240 or RC1701 / RC1701HP or RC1740 / RC1740HP or RC1780 / RC1780HP or RC11x. Could you supply a final schematic for all pins (series resistors, pull-up, diode etc.)?
- [RC232] “We are drawing a new board which used your module RC1180. We are in a final phase. For the interface with the our µC, we connected only the pins : – RxD & TxD for module configuration and normal use for communication – Pin Reset, Pin 19, Pin 20 : for future programming (case of firmware update) Also, we connected the pin Vcc and ground with recommandations described in your data sheet. I would like to know, if we can use functions of test carrier transmit, modulation transmit and permanent receipt with only the pins RxD and TxD (RTS, CTS and config not connected to our µC but available on test pads). Do you have a procedure to put this module in test mode. For a firmware upgrade, could you confirm us that we need only Pin 19, 20 and reset ? “
- [RC232] Should RC1140 be better than RC1180for this application because attenuation on water will be lower a at 433 ?