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參數(shù)資料
| 型號： | CC2420 |
| 廠商： | Electronic Theatre Controls, Inc. |
| 英文描述： | 2.4 GHz IEEE 802.15.4 / ZigBee-ready RF Transceiver |
| 中文描述： | 2.4 GHz IEEE 802.15.4標準/ ZigBee功能的RF收發(fā)器 |
| 文件頁數(shù)： | 34/87頁 |
| 文件大?。?/td> | 1418K |
| 代理商： | CC2420 |
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SmartRF
CC2420
continuous start of frame delimiter (SFD)
search.
When a SFD is detected, data is written to
the RXFIFO and may be read out by the
microcontroller at a lower bit rate than the
250 kbps generated by the receiver.
The
CC2420
demodulator also handles
symbol rate errors in excess of 120 ppm
without
performance
degradation.
Resynchronisation
continuously to adjust for error in the
incoming symbol rate.
is
performed
The
MDMCTRL1.CORR_THR
control bits
should be written to 20 to set the threshold
for detecting IEEE 802.15.4 start of frame
delimiters.
Digital
IF Channel
Filtering
ADC
Digital
Data
Filtering
Frequency
Offset
Compensation
Symbol
Correlators and
Synchronisation
RSSI
Generator
I / Q Analog
IF signal
Data
Symbol
Output
RSSI
Average
Correlation
Value (may be
used for LQI)
Figure 15. Demodulator Simplified Block Diagram
Frame Format
CC2420
has hardware support for parts of
the IEEE 802.15.4 frame format. This
section gives a brief summary to the IEEE
802.15.4 frame format, and describes how
CC2420
is set up to comply with this.
Figure 16 [1] shows a schematic view of
the IEEE 802.15.4 frame format. Similar
figures describing specific frame formats
(data
frames,
acknowledgment
frames
command frames) are included in [1].
beacon
frames,
MAC
and
Figure 16. Schematic view of the IEEE 802.15.4 Frame Format [1]
Synchronisation header
The
consists of the preamble sequence
synchronisation
header
(SHR)
followed by the start of frame delimiter
(SFD). In [1], the preamble sequence is
defined to be 4 bytes of 0x00. The SFD is
one byte, set to 0xA7.
PHY
Layer
Frame
Control Field
(FCF)
Data
Sequence
Number
MAC Header (MHR)
2
1
Bytes:
Address
Information
0 to 20
Frame payload
n
Frame Check
Sequence
(FCS)
MAC Footer
(MFR)
2
MAC Payload
Frame
Length
MAC Protocol
Data Unit
(MPDU)
PHY Service Data Unit
(PSDU)
Start of frame
Delimiter
(SFD)
Bytes:
1
1
5 + (0 to 20) + n
Preamble
Sequence
4
Synchronisation Header
(SHR)
PHY Header
(PHR)
PHY Protocol Data Unit
(PPDU)
11 + (0 to 20) + n
MAC
Layer
Chipcon AS
SmartRF
CC2420 Preliminary Datasheet (rev 1.2), 2004-06-09
Page 34 of 87
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| CC2420/T&R | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:2.4 GHz IEEE 802.15.4 / ZigBee-ready RF Transceiver |
| CC2420/TR | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:2.4 GHz IEEE 802.15.4 / ZigBee-ready RF Transceiver |
| CC2420DBK | 功能描述:Zigbee/802.15.4開發(fā)工具 CC2420 DEMO KIT 2 DEMO BOARDS RoHS:否 制造商:Silicon Labs 產(chǎn)品:Development Kits 工具用于評估:EM35x 頻率:2.4 GHz 接口類型:USB 工作電源電壓: |
| CC2420DK | 功能描述:Zigbee/802.15.4開發(fā)工具 CC2420 DEVELOPMENT KIT RoHS:否 制造商:Silicon Labs 產(chǎn)品:Development Kits 工具用于評估:EM35x 頻率:2.4 GHz 接口類型:USB 工作電源電壓: |
| CC2420EMK | 功能描述:Zigbee/802.15.4開發(fā)工具 CC2420 EVALUATION KT (2)PCBs & (2)ANTENNA RoHS:否 制造商:Silicon Labs 產(chǎn)品:Development Kits 工具用于評估:EM35x 頻率:2.4 GHz 接口類型:USB 工作電源電壓: |
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