http : //www.wenshing.com.tw ; http://www.rf.net.tw trw - 4432 - 433 datasheet p. 1 wenshing ?? trw - 4432-433 rf module 433mh z ism t ransceiver m odule version history version date changes v1.0 0 september 26 , 2013 1 st. edition v1.0 0 november 19 , 2013 1 st. edition
http : //www.wenshing.com.tw ; http://www.rf.net.tw trw - 4432 - 433 datasheet p. 2 key features ? worldwide 433 ism band operation ? 0.123 to 25 6kbps on air datarates ? ultra low power operation ? output power range +20 dbm max ? 18.5 ma receive, 85 ma @ +20 dbm transmit ? digital rssi ? fsk, gfsk, and ook modulation ? low cost ? 1. 8 to 3.6v supply range ? temperature sensor and 8 - bit adc ? automatic packet handling ? auto packet transaction handling ? tx and rx 64 byte fifos ? on - chip crystal tuning applications ? wireless pc peripherals ? home security & alarm ? sensor networks ? advanced media center remote controls ? toys ? game controllers ? sports watches and sensors ? rf remote controls for consumer electronics ? home and commercial automation ? ultra low power sensor networks ? active rfid ? asset tracking systems product description trw - 4432 - 433 is a fully - integrated and high - power wireless radio module. with high - performance transceivers, it can reach its maximum efficiency at very low power consumption. this module is mainly used in the ism (industrial, scientific and medical) and srd (short range device). it works at frequency band 420mhz~450mhz, with a b uilt - in pa, and an output up to +19dbm. may flexibly adjust the power by an spi interface. in order to keep abreast of the module in the operating temperature range, you can not only control the output and receive data but also read the rf ic's temperature through the spi control interface. pin assignments
http : //www.wenshing.com.tw ; http://www.rf.net.tw trw - 4432 - 433 datasheet p. 3 pin function pin name i/o description 1 antenna input /output antenna 2 gnd gnd ground 3 ant rx input controlled antenna switch, if receiver mode is high voltage 4 ant tx input controlled antenna switch , if transmitter mode is high voltage 5 vcc input +1.8v to +3.6 v supply voltage input to internal regulators 6 gpio0 digital i/o general purpose digital i/o that may be configured through the registers to perform various functions including: microcontroller clock output, fifo status, por, wake - up timer, low battery detect, tr sw, antdiversity control, etc. see the spi gpio configuration registers, address 0bh, 0ch, and 0dh for more information. 7 gpio 1 digital i/o 8 gpio 2 digital i/o 9 gnd gnd ground. 10 sdo digital output provides a serial read back function of the internal control registers. 11 sdi digital input this pin provides the serial data stream for the 4 - line 12 sclk digital i nput serial clock input. digital input. this pin provides the serial data clock function for the 4 - line serial data bus. data is clo cked into the rf chip on positive edge transitions 13 n sel digital input serial interface select input. 0 ? vdd v digital input. this pin provides the select/enable function for the 4 - line serial data bus. the signal is also used to signify burst read/write mode 14 nirq digital output general microcontroller interrupt status output. when the si4430/31/32 exhibits anyone of the
http : //www.wenshing.com.tw ; http://www.rf.net.tw trw - 4432 - 433 datasheet p. 4 interrupt events the nirq pin will be set low=0. please see the control logic registers section for more information on the interrupt events. the microcontroller can then determine the state of the interrupt by reading a corresponding spi interrupt status registers, address 03h and 04h. no external resistor pull - up is required, but it may be desirable if multiple interrupt lines are connected 15 sdn digital input shutdown input pin. 0 ? vdd v digital input. sdn should be = 0 in all modes except shutdown mode. when sdn =1 the chip will be completely shut down and the contents of the registers will be lost. 16 gnd gnd ground
http : //www.wenshing.com.tw ; http://www.rf.net.tw trw - 4432 - 433 datasheet p. 5 1 hardware specification 1.1 specification conditions: vdd =vcc = 3v , vss = 0v, ta = 2 5oc parameter symbol test condition min typ e max unit supply voltage range p ower 1.8 3 3.6 v v power down p ower power down 15 n a rx mode current receiver 1kbps 18.5 ma tx mode current transmitter 20dbm 85 ma rx sensitivity receiver 512 bps 433mh z - 121dbm dbm
http : //www.wenshing.com.tw ; http://www.rf.net.tw trw - 4432 - 433 datasheet p. 6 support trw - 4432 - 433 module has the built - in antenna switch. while transmitting or receiving signals, ant tx and ant rx are controllable. either mcu or gpio 0/gpio 1/gpio 2 can be chosen to control. for instance, connect gpio - 0 to ant tx pin and gpio - 1 to ant rx pin. when the module is in receiving mode, gipo - 0 should be initialized as lo and gpio - 1 as hi; while in transmitting mode, gpio - 0 should be initialized as hi and gpio - 1 as lo . gpio - 0 gpio - 1 ns r eceiver lo hi t ransmit hi lo
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