cb-obs411 electrical mechanical data sheet - SE Spezial-Electronic ...

More documents

Recommendations

Info

connectBlue10.2.3.4 Switch-0 SignalSwitch-0 is used for the external connect function. A secondary function is that the module will restore all factory settings if both theSwitch-1 and Switch-0 signals are low during start up. See the Serial Port Adapter AT Commands specification for more details.Sometimes, over time, switch contacts can get an oxide layer. This may cause the closed switch resistance to become too high to sinkthe signal to logic LOW because the signal is internally pulled-up (see Input/Output signals). A design that prevents this can be found inFigure 29.Figure 28: A low resistance function switch used.\Figure 29: If the resistance in the switch is not guaranteed to be low enough, a safer design can be used.The Switch-0 pin can be left unconnected if its functionality is not used.10.2.4 ResetThe pin can be connected to an external reset source, see Figure 30 for a switch example.If the reset signal is connected to an output signal it must be an open drain collector, see Figure 31.Thepin can be left unconnected if not used.Copyright © 2010 connectBlue AB Page 40 of 42
connectBlueFigure 30: A reset switch.Figure 31: Design of an open collector reset from an active high output.10.2.5 A Complete 5V Host System InterfaceFigure 32 is a complete 5V host system interface example with an RGB LED and two switches (except the serial interface, see sectionSerial Interface for information). The design is based on the LM339 Quad OP-amp instead of logic gates.Copyright © 2010 connectBlue AB Page 41 of 42
Page 1 and 2: connectBlueCB-OBS411 ELECTRICAL MEC
Page 3 and 4: connectBlue2 IntroductionThe hardwa
Page 5 and 6: connectBlue2.3 Block DiagramFigure
Page 7 and 8: connectBlue3.1 Pin Numbering3.1.1 J
Page 9 and 10: connectBlue13 - 8 - GREEN/Switch-1
Page 11 and 12: connectBlueR IN_PULL-UPInput signal
Page 13 and 14: connectBlue5 Antennas5.1 Surface Mo
Page 15 and 16: connectBlue5.2.2 AntennasPart Numbe
Page 17 and 18: connectBluePartNumberNamecB-ACC-17R
Page 19 and 20: connectBlue6 Mechanics6.1 Module Ou
Page 21 and 22: connectBlueFigure 9: Host PCB layou
Page 23 and 24: connectBlueThe modules are produced
Page 25 and 26: connectBlueFor more information ple
Page 27 and 28: connectBlue8.3 FCC and IC Complianc
Page 29 and 30: connectBlue9 Guidelines for Efficie
Page 31 and 32: connectBlue10.2.1.2.2 Module output
Page 33 and 34: connectBlue10.2.2.2 External RS232
Page 35 and 36: connectBlueFigure 17: A complete RS
Page 37 and 38: connectBlueFigure 21: A red LED in
Page 39: connectBlueFigure 25: No restore sw

cb-obs411 electrical mechanical data sheet - SE Spezial-Electronic ...

Create successful ePaper yourself

Delete template?

Save as template?