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TRC104 参数 Datasheet PDF下载

TRC104图片预览
型号: TRC104
PDF下载: 下载PDF文件 查看货源
内容描述: 2.4 GHz射频收发器 [2.4 GHz RF Transceiver]
分类和应用: 射频
文件页数/大小: 33 页 / 1023 K
品牌: RFM [ RF MONOLITHICS, INC ]
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5 Data Transfer Modes  
The TRC104 supports two data transfer modes - Continuous Data Mode and Burst Data Mode. The data transfer  
mode is selected by the D_Mode bit in configuration register 0x02.  
5.1 Continuous Data Mode  
Continuous Data Mode is selected when the D_Mode bit of register 0x02 is set to 0. Continuous Receive Mode  
routes demodulated data directly to the SDAT pin and the associated clock to the SCLK pin. In Continuous  
transmit mode the data bit stream is applied directly to the SDAT pin. The internal FIFOs and the automatic  
packet features are disabled in Continuous Data Mode. It is the responsibility of the TRC104 host microcontroller  
to handle these functions.  
5.1.1 Continuous Transmit Mode  
Continuous Transmit Mode is enabled when the C_Mode bit of register 0x00 is set to 1 and the D_Mode bit of  
register 0x02 is set to 0. In Continuous Transmit Mode, the transmit FIFO and all automatic packet features  
including preamble generation, addressing, DC-balanced data scrambling and CRC generation are disabled. The  
TRC104 host microcontroller must handle these functions for Continuous Transmit Mode. Specifically, the host  
microcontroller must generate a 1-0-1-0 preamble sequence of at least 16 bits followed immediately by the  
destination address for the transmission (called the sender or local device address at the destination node).  
Also for this mode, it is the responsibility of the host microcontroller to maintain correct bit timing to an accuracy of  
1% as there is no bit clock output for transmit timing. The host microcontroller must be powerful enough to  
accurately support the selected serial data rate (250 kb/s or 1 Mb/s) in addition to other functions required for the  
end application. Figure 11and Table 10 show the timing for transmitting data on SDAT. Note that three 1 dummy  
bits must be sent prior to sending the preamble and the rest of the packet.  
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Figure 11  
Item Description  
Min Typ Max Unit  
T1  
T2  
T3  
MODE to 1st Bit Time  
250  
3
µs  
bit  
Dummy Bits  
RF Transmission Time  
4
ms  
Table 10  
The TRC104 should not be active for more than 4 ms at a time to allow for internal auto-calibration. Typical  
calibration time is 200 µs.  
5.1.2 Continuous Receive Mode  
Continuous Receive Mode is enabled when the C_Mode bit of register 0x00 is set to 0 and the D_Mode bit of  
register 0x02 is set to 0. In Continuous Receive Mode, the receive FIFO and automatic packet features except  
www.RFM.com E-mail: info@rfm.com  
©2009 by RF Monolithics, Inc.  
Technical support +1.800.704.6079  
Page 14 of 33  
TRC104 - 08/13/09