- 您现在的位置：买卖IC网 > PDF目录18758 > SX1211I084TRT (Semtech)IC SNGL-CHIP TXRX 32-TQFN PDF资料下载
参数资料
| 型号： | SX1211I084TRT |
| 厂商： | Semtech |
| 文件页数： | 53/92页 |
| 文件大小： | 0K |
| 描述： | IC SNGL-CHIP TXRX 32-TQFN |
| 标准包装： | 1 |
| 频率： | 860 ~ 960MHz |
| 数据传输率 - 最大： | 200kbps |
| 调制或协议： | FSK，OOK |
| 应用： | AMR，ISM，安防门禁 |
| 功率 - 输出： | 12.5dBm |
| 灵敏度： | -113dBm |
| 电源电压： | 2.1 V ~ 3.6 V |
| 电流 - 接收： | 3mA |
| 电流 - 传输： | 25mA |
| 数据接口： | PCB，表面贴装 |
| 天线连接器： | PCB，表面贴装 |
| 工作温度： | -40°C ~ 85°C |
| 封装/外壳： | 32-TQFN |
| 包装： | 标准包装 |
| 产品目录页面： | 584 (CN2011-ZH PDF) |
| 配用： | 1210-1060-2-ND - 915MHZ ASPICS SX1211 CHIP SET 1210-1059-2-ND - 868MHZ ASPICS SX1211 CHIP SET 1210-1060-6-ND - 915MHZ ASPICS SX1211 CHIP SET 1210-1059-6-ND - 868MHZ ASPICS SX1211 CHIP SET 1210-1060-1-ND - 915MHZ ASPICS SX1211 CHIP SET 1210-1059-1-ND - 868MHZ ASPICS SX1211 CHIP SET |
| 其它名称： | SX1211I084DKR |
第1页第2页第3页第4页第5页第6页第7页第8页第9页第10页第11页第12页第13页第14页第15页第16页第17页第18页第19页第20页第21页第22页第23页第24页第25页第26页第27页第28页第29页第30页第31页第32页第33页第34页第35页第36页第37页第38页第39页第40页第41页第42页第43页第44页第45页第46页第47页第48页第49页第50页第51页第52页当前第53页第54页第55页第56页第57页第58页第59页第60页第61页第62页第63页第64页第65页第66页第67页第68页第69页第70页第71页第72页第73页第74页第75页第76页第77页第78页第79页第80页第81页第82页第83页第84页第85页第86页第87页第88页第89页第90页第91页第92页
SX1211
WIRELESS & SENSING
Please note that the received length byte, as part of the payload, is not stripped off the packet and is made
available in the FIFO.
To disable this function the user should set the value of the PKTParam_Payload_length to the value of the FIFO
size selected.
5.5.5.4. CRC Based
The CRC check is enabled by setting bit PKTParam_CRC_on. It is used for checking the integrity of the message.
On Tx side a two byte CRC checksum is calculated on the payload part of the packet and appended to the end
of the message.
On Rx side the checksum is calculated on the received payload and compared with the two checksum bytes
received. The result of the comparison is stored in the PKTParam_CRC_status bit and CRC_OK IRQ source.
By default, if the CRC check fails then the FIFO is automatically cleared and no interrupt is generated. This filtering
function can be disabled via PKTParam_CRC_autoclr bit and in this case, even if CRC fails, the FIFO is not
cleared and only Payload_ready interrupt goes high. Please note that in both cases, the two CRC checksum bytes
are stripped off by the packet handler and only the payload is made available in the FIFO.
The CRC is based on the CCITT polynomial as shown in Figure 45. This implementation also detects errors due to
leading and trailing zeros.
data input
CRC Polynomial =X 16 + X 12 + X 5 + 1
X 15
X 14
X 13
X 12
X 11
***
X 5
X 4
***
X 0
Figure 45: CRC Implementation
5.5.6. DC-Free Data Mechanisms
The payload to be transmitted may contain long sequences of 1’s and 0’s, which introduces a DC bias in the
transmitted signal. The radio signal thus produced has a non uniform power distribution over the occupied channel
bandwidth. It also introduces data dependencies in the normal operation of the demodulator. Thus it is useful if the
transmitted data is random and DC free.
For such purposes, two techniques are made available in the packet handler: Manchester encoding and data
whitening. Please note that only one of the two methods should be enabled at a time.
5.5.6.1. Manchester Encoding
Manchester encoding/decoding is enabled by setting bit PKTParam_Manchester_on and can only be used in
Packet mode.
The NRZ data is converted to Manchester code by coding ‘1’ as “10” and ‘0’ as “01”.
In this case, the maximum chip rate is the maximum bit rate given in the specifications section and the actual bit
rate is half the chip rate.
Rev 8 – February 2013
Page 53 of 92
www.semtech.com
相关PDF资料 |
PDF描述 |
|---|---|
| 12-900-LPI | XFRMR PWR 115/230V 12.6VCT 900MA |
| 10-1200-LPI | XFRMR PWR 115/230V 10VCT 1.2A |
| MT-6-12 | XFRMR 115V 5V 1.75A 6VA 3OUT |
| ATMEGA64RZAV-10MU | MCU ATMEGA644/AT86RF230 44-QFN |
| ATMEGA128RFA1-ZU | IC AVR MCU 2.4GHZ XCEIVER 64QFN |
相关代理商/技术参数 |
参数描述 |
|---|---|
| SX1211I084TRT | 制造商:Semtech Corporation 功能描述:GPSS WL SKU APP1 |
| SX1211I084TRT-CUT | 制造商:Semtech Corporation 功能描述: |
| SX1211I097.TRT | 制造商:Semtech Corporation 功能描述: |
| SX1211MESH-868 | 制造商:Semtech Corporation 功能描述:10 MODULES MESH NETWORK |
| SX1211SK868 | 制造商:Semtech Corporation 功能描述:Full Evalulation Kit For Ultra-Low Power Integrated UHF Transceiver |
发布紧急采购，3分钟左右您将得到回复。