TRW データシートの表示（PDF） - Unspecified

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TRW

Wireless High Frequency Transceiver Module (RF GFSK)

Unspecified 

5.1 Configuration Mode

All configuration of theTRW-24G is done via 3-wire interface to a single configuration register. The

configuration word can be up to 15 bytes long for ShockBurst TM.

5.1 .1 Configuration of ShockBurstTM operation:

The configuration word in ShockBurstTM enables theTRW-24G to handle the RF protocol. Once

the protocol is completed and loaded intoTRW -24G only one byte, bit [7:0], needs to be updated

during actual operation.

The configuration blocks dedicated to ShockBurstTM is as follows:

1. Payload section width: Specifies the number of payload bits in a RF package. This

enables theTRW-24G to distinguish between payload data and the CRC bytes in a

received package.

2. Address width: Sets the number of bits used for address in the RF package, This

enables theTRW-24G to distinguish between address and payload data.

3. Address (RX Channel 1 and 2): Destination address for received data.

4. CRC: Enables TRW-24G on-chip CRC generation and de-coding.

NOTE

These configuration blocks, with the exception of the CRC, are dedicated for the packages that a

TRW-24G is to receive. In TX mode, the MCU must generate an address and a payload section

that fits the configuration of the TRW-24G that is to receive the data. When using theTRW-24G

on-chip CRC feature ensure that CRC is enabled and uses the same length for both the TX and

RX devices.

PRE-AMBLE

ADDRESS

PAYLOAD

Figure 1 Data packet set-up

CRC

5.1.2 Configuration for Direct Mode operation

For direct mode operation only the two first bytes (bit[15:0]) of the configuring word are relevant.

Configuration word overview

Bit Number

Position of bits

Name

143:120

119:112

24 TEST

8 DATA2_W

111:104

103:64

63:24

8 DATA1_W

40 ADDR2

40 ADDR1

23:18

17

6 ADDR_W

1 CRC_L

16

1 CRC_EN

Function

Reserved for testing

Length of data payload section RX channel 2

Length of data payload section RX channel 1

Up to 5 byte address for RX channel 2

Up to 5 byte address for RX channel 1

Number of address bits (both RX channels).

8 or 16 bit CRC

Enable on-chip CRC generation/checking.

http://www.wenshing.com.tw ; http://www.rf.net.tw

TRW-24G Datasheet P.8

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