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参数资料
| 型号： | 4431-T-B1 D 470 |
| 厂商： | Silicon Laboratories Inc |
| 文件页数： | 43/47页 |
| 文件大小： | 799K |
| 描述： | KIT DEV TEST EZRADIOPRO SI4431 |
| 标准包装： | 1 |
| 附件类型： | 测试卡，收发器，470MHz |
| 适用于相关产品： | EZRadioPRO? |
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Si4430/31/32-B1
Rev 1.1
43
6.3. Packet Handler TX Mode
If the TX packet length is set the packet handler will send the number of bytes in the packet length field before
returning to IDLE mode and asserting the packet sent interrupt. To resume sending data from the FIFO the
microcontroller needs to command the chip to re-enter TX mode. Figure 19 provides an example transaction where
the packet length is set to three bytes.
Figure 19. Multiple Packets in TX Packet Handler
6.4. Packet Handler RX Mode
6.4.1. Packet Handler Disabled
When the packet handler is disabled certain fields in the received packet are still required. Proper modem
operation requires preamble and sync when the FIFO is being used, as shown in Figure 20. Bits after sync will be
treated as raw data with no qualification. This mode allows for the creation of a custom packet handler when the
automatic qualification parameters are not sufficient. Manchester encoding is supported but data whitening, CRC,
and header checks are not.
Figure 20. Required RX Packet Structure with Packet Handler Disabled
6.4.2. Packet Handler Enabled
When the packet handler is enabled, all the fields of the packet structure need to be configured. Register contents
are used to construct the header field and length information encoded into the transmitted packet when
transmitting. The receive FIFO can be configured to handle packets of fixed or variable length with or without a
header. If multiple packets are desired to be stored in the FIFO, then there are options available for the different
fields that will be stored into the FIFO. Figure 21 demonstrates the options and settings available when multiple
packets are enabled. Figure 22 demonstrates the operation of fixed packet length and correct/incorrect packets.
Figure 21. Multiple Packets in RX Packet Handler
ata 1
ata 2
ata 3
ata 4
ata 5
ata 6
ata 7
ata 8
ata 9
}
}
}
This will be sent in the first transmission
This will be sent in the second transmission
This will be sent in the third transmission
Preamble
SYNC
DATA
Register
Data
Register
Data
FIFO
Data
Header(s)
Length
rx_multi_pk_en = 1
H
Data
rx_multi_pk_en = 0
txhdlen = 0
txhdlen > 0
fixpklen
fixpklen
0 1
0
1
Data
Data
Data
Data
L
L
H
RX FIFO Contents:
Transmission:
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相关代理商/技术参数 |
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|---|---|
| 4431-T-B1D868 | 制造商:Silicon Laboratories Inc 功能描述:One tied antenna Tx/Rx test card 868MHz |
| 4432 | 制造商:3M Electronic Products Division 功能描述:DOUBLE COATED VINYL FOAM TAPE, BLACK, 1/4" X 72 YD 1/32" |
| 44320-01-445-1 | 制造商:UNBRANDED 功能描述:IC SOCKET +0.1UF 20WAY |
| 443204-000 | 制造商:TE Connectivity 功能描述:ST63-5-00 - Bulk |
| 4432-1"X72YDS-WHITE | 功能描述:胶带 DBL COATED VINYL FM 1X72YDS WHITE RoHS:否 制造商:3M Electronic Specialty 产品:Tapes 类型:Shielding 描述/功能:EMI/RFI Foil Shielding Tape 颜色: 材料:Copper Foil 宽度:1 in x 18 yds |
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