http : //www.wenshing.com.tw ; http://www.rf.net.tw trw - v4b - d data sheet p. 1 wenshing ?? trw - v4b - d rf module wireless low power transceiver rf module version history version date changes v1.01 dec.16 , 200 6 1 st . edition v1.02 aug.20 , 2007 2 nd . edition v1.03 aug.2 7 , 2008 3 rd . edition
http : //www.wenshing.com.tw ; http://www.rf.net.tw trw - v4b - d data sheet p. 2 key feature ? uhf wireless data transceiver ? rf output power u p t o 10mw ? sensitivity u p t o - 112dbm ? low power consumption ? voltage supply 3 .5v to 5 .5 v ? spi micro - c ontroller interface ? transceiver data rate : 1.2kbps~250kbps applications ? wireless networks ? wireless remote control ? remote keyless entry ? multi - channel home automation standards ? wireless rs - 232 usb ? active rfid ? rfid base station transmitter characteristic parameter min typ e max unit condition operating condition operating t emperature r ange - 10 + 70 operating s uppl y v oltage 3 .5 5 .5 v current consumption r eceiver m ode 21 ma t ransmitter m ode 2 4 ma vcc 5v sleep m ode 2 m a vcc 5v rf characteristic frequency r ange 800 928 mhz data r ate 1.2 25 0 kbps fsk transmitter output p ower 0 10 dbm receiver s ens itivity - 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 - d data sheet p. 3 block diagram view
http : //www.wenshing.com.tw ; http://www.rf.net.tw trw - v4b - d data sheet p. 4 pin assignment pin function i/o description 1 ant ant antenna interface 2 gnd p power n egative 3 gnd p power n egative 4 res e t o lo action 5 p2 o set 6 2.7v out p internal p ower o utput 7 voice in o serial r ate c hoice 8 voice out n 9 p1.2 n 10 p1.0 n 11 p1.1 n 12 p1.3 n 13 p1.4 i rf serial data i nput ( spi i ) 14 p1.5 o rf serial data output ( spi o ) 15 p 1.6 o serial r ate c hoice 16 p1.7 o serial r ate c hoice 17 vdd in p power cathode 18 gnd p power n egative
http : //www.wenshing.com.tw ; http://www.rf.net.tw trw - v4b - d data sheet p. 5 application circuit
http : //www.wenshing.com.tw ; http://www.rf.net.tw trw - v4b - d data sheet p. 6 planning module approach the use of negative trigger p2 pin source and it will set in to the state. p1.4 under instructions to amend wireless transmission frequency and wireless transmission rate. it will be automatically deposited after trw - v4b - d setting, and it will save the date set by p1.5 return. general mode o f communication a. the following table through the adjustment required by the work rate interface : v oice i n p1.6 p1.7 rate 1 1 1 1.2kbps 1 1 0 2.4kbps 1 0 1 4.8kbps 1 0 0 9.6kbps 0 1 1 19.2kbps 0 1 0 38.4 kbps 0 0 1 56 .0 kbps 0 0 0 115.2kbps
http : //www.wenshing.com.tw ; http://www.rf.net.tw trw - v4b - d data sheet p. 7 b. under normal working conditions, it will automatically update the settings after changing their work rate with trw - v4b - d. c. the use of negative trigger p2 pin source that is set into the state, all the group of trw - v4b - d rf work rate and the frequency set to work, it will not be able to send information. after re - electricity, trw - v4b - d will automatically call the last set of work rate and frequency, as the current work rate and frequency. d. by p1.4 sent information to the trw - v4b - d, as l ong as its members in the group receiving can be received within the scope of its information. c ommand f ormat frequency and wireless transmission rate of 0 xabcdefghijklmn written instructions wer e 7 byte s 16 - band 7 byte s . this is not bein g dealt with the command is less than 7 byte s or two before the byte is not equivalent to 0 x1234 . abcd leader commands and it i s fixed data "1234 h". e is fixed at 0 h . f is for the wireless transmission rate settings . value 0 1 2 3 4 5 6 7 8 rate ( bps ) 1200 2400 4800 9600 19.2k 38.4k 76.8k 100k 250k remark: the lower wireless transmission rate will cause farther distance carrier and initial value is for the 9600 k bps . ghijkl is the value of wireless transmission frequenc y settings, each base to 10khz . f or example, 868 mh z = 015310h, 922.56mhz=016860h ( i nitial value is 925mhz ) mn is the id number for trw - v4b - d . (the initial value is 0 x00) command communication mode r ead trw - v4b - d p arameters of c ommand: send value = 0 x1234567868acfd return = 03 01 69 5 4 02 03 = wireless transmission rate (9600kbps), 01 69 54 = equipment frequency (925mhz), 02 = id code read trw - v4b d rssi p arameters of c ommand: send value = 0 x1234567868acfe return value = bc bc = rssi value s leep m ode parameters of command: send value = 0 x1234567868acff a f ter sent trw - v4b - d immediately , it will enter sleep mode soon. a s long as the p1.4 received information , it will be automatically entered standby mode wake - up call . point - to - p oint t ransmission m ode p arameters of c ommand: send value = 0 x1234567868ac0000ssttddddddddd
http : //www.wenshing.com.tw ; http://www.rf.net.tw trw - v4b - d data sheet p. 8 ss - sent is on behalf of the id number ; tt is on behalf of the receiving end for the id number and dddd is on behalf of data (not set this mode, trw - v4b - d is to broadcast the operation) . following is an example of the value set the rf transmission rate is 19.2kbps, operating frequency is: 868.00mhz, id code is 10. send value = 0 x12340301531000 bit47 bit46 bit45 bit44 bit43 bit42 bit41 bit40 0 0 0 1 0 0 1 0 location information instructions a (fixed leader script) directive location information b ( fixed leader script) bit39 bit38 bit37 bit36 bit35 bit34 bit33 bit32 0 0 1 1 0 1 0 0 directive location information c (fixed leader script) directive location information d (fixed leader script) bit31 bit30 bit29 bit28 bit27 bit26 bit25 bit24 0 0 0 0 0 1 0 0 e location information directive directive location information f (wireless transmission rate set) bit23 bit22 bit21 bit20 bit19 bit18 bit17 bit16 0 0 0 0 0 0 0 1 directive location information g (frequency settings) command position informatio n h (frequency settings) bit15 bit14 bit13 bit12 bit11 bit10 bit9 bit8 0 1 0 1 0 0 1 1 directive location information i (frequency settings) directive location information i (frequency settings) bit7 bit6 bit5 bit4 bit3 bit2 bit1 bit0 0 0 0 1 0 0 0 0 directive location information k (frequency settings) directive location information l (frequency settings) bit7 bit6 bit5 bit4 bit3 bit2 bit1 bit0 0 0 0 1 0 0 0 0 directive location information m ( id ) directive location information n ( id )
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