http : //www.wenshing.com.tw ; http://www.rf.net.tw trw - v4b - v data s heet p. 1 wenshing ?? trw - v4b - v rf module wireless voice transceiver rf module (ism band system) version history version date changes v1.01 dec.1 5 , 200 6 1 st . edition v1.02 aug.20 , 2007 2 nd . edition v1.03 jan . 13 , 2009 3 rd . edition
http : //www.wenshing.com.tw ; http://www.rf.net.tw trw - v4b - v data s heet p. 2 key feature ? uhf wireless data transceiver ? rf output power u p t o 10 mw ? sensitivity u p t o - 112 dbm ? low power consumption ? voltage sup ply 3 .5 v to 5 .5 v ? spi m icro - c ontroller interface ? transceiver data rate : 1.2kbps~ 25 0kbps application ? wireless phone ? wireless audio ? wireless door bell ? wireless microphone characteristic parameter min type max uni t condition operating condition operating t emperature r ange - 10 + 70 operating s upply v oltage 3 .5 5 .5 v current consumption rx m ode 21 ma tx m ode 2 4 ma vcc 5v sleep m ode 2 m a vcc 5v rf char a cteristic frequency r ange 922 mhz data r ate 1.2 25 0 kbps fsk tx output p ower 0 10 dbm rx s ensitivity - 1 12 dbm modulation fsk m sk other fifo 64 byte esd 500 v
http : //www.wenshing.com.tw ; http://www.rf.net.tw trw - v4b - v data s heet p. 3 block diagram view
http : //www.wenshing.com.tw ; http://www.rf.net.tw trw - v4b - v data s heet p. 4 pin assignment pin function i/o description 1 ant ant antenna 2 gnd p ground 3 gnd p ground 4 res e t o lo trigger 5 p2 o led indicates 6 2.7v out p power output 7 voice in i audio in 8 voice out o audio out 9 p1.2 o control pin 10 p1.0 o connect button 11 p1.1 n 12 p1.3 n 13 p1.4 i uar t rx 14 p1.5 o uar t tx 15 p1.6 o call button 16 p1.7 o led indicates 17 vdd in p power input 18 gnd p ground
http : //www.wenshing.com.tw ; http://www.rf.net.tw trw - v4b - v data s heet p. 5 application circuit
http : //www.wenshing.com.tw ; http://www.rf.net.tw trw - v4b - v data s heet p. 6
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