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参数资料
型号： CC2480A1RTC
厂商： Texas Instruments
文件页数： 30/48页
文件大小： 0K
描述： IC Z-ACCEL ZIGBEE PROC 48-VQFN
产品培训模块： RFID Technology and Applications
标准包装： 260
系列： CC2480
频率： 2.4GHz
数据传输率 - 最大： 115kBaud
调制或协议： 802.15.4 Zigbee
应用： AMR，ISM，SRD
功率 - 输出： 0dBm
灵敏度： -92dBm
电源电压： 2 V ~ 3.6 V
电流 - 接收： 27mA
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： 48-VFQFN 裸露焊盘
包装： 托盘
配用： EZ430-RFZACC06-ND - EZ430-RFZACC06
296-23357-ND - KIT DEMO FOR CC2480
其它名称： 296-23580
CC2480
10.1 IEEE 802.15.4 Modulation Format
This section is meant as an introduction to the
2.4 GHz direct sequence spread spectrum
(DSSS) RF modulation format defined in IEEE
802.15.4. For a complete description, please
refer to [1].
The modulation and spreading functions are
illustrated at block level in Figure 10 [1]. Each
byte is divided into two symbols, 4 bits each.
The least significant symbol is transmitted first.
For multi-byte fields, the least significant byte
is transmitted first.
Each symbol is mapped to one out of 16
pseudo-random sequences, 32 chips each.
The symbol to chip mapping is shown in Table
20. The chip sequence is then transmitted at 2
MChips/s, with the least significant chip (C 0 )
transmitted first for each symbol.
Transmitted
bit-stream
(LSB first)
Bit-to-
Symbol
Symbol-
to-Chip
O-QPSK
Modulator
Modulated
Signal
Figure 10: Modulation and spreading functions [1]
The modulation format is Offset – Quadrature
Phase Shift Keying (O-QPSK) with half-sine
chip shaping. This is equivalent to MSK
sine, transmitted alternately in the I and Q
channels with one half chip period offset. This
is illustrated for the zero-symbol in Figure 11.
modulation. Each chip is shaped as a half-
Table 20: IEEE 802.15.4 symbol-to-chip mapping [1]
Symbol
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
Chip sequence (C 0 , C 1 , C 2 , … , C 31 )
1 1 0 1 1 0 0 1 1 1 0 0 0 0 1 1 0 1 0 1 0 0 1 0 0 0 1 0 1 1 1 0
1 1 1 0 1 1 0 1 1 0 0 1 1 1 0 0 0 0 1 1 0 1 0 1 0 0 1 0 0 0 1 0
0 0 1 0 1 1 1 0 1 1 0 1 1 0 0 1 1 1 0 0 0 0 1 1 0 1 0 1 0 0 1 0
0 0 1 0 0 0 1 0 1 1 1 0 1 1 0 1 1 0 0 1 1 1 0 0 0 0 1 1 0 1 0 1
0 1 0 1 0 0 1 0 0 0 1 0 1 1 1 0 1 1 0 1 1 0 0 1 1 1 0 0 0 0 1 1
0 0 1 1 0 1 0 1 0 0 1 0 0 0 1 0 1 1 1 0 1 1 0 1 1 0 0 1 1 1 0 0
1 1 0 0 0 0 1 1 0 1 0 1 0 0 1 0 0 0 1 0 1 1 1 0 1 1 0 1 1 0 0 1
1 0 0 1 1 1 0 0 0 0 1 1 0 1 0 1 0 0 1 0 0 0 1 0 1 1 1 0 1 1 0 1
1 0 0 0 1 1 0 0 1 0 0 1 0 1 1 0 0 0 0 0 0 1 1 1 0 1 1 1 1 0 1 1
1 0 1 1 1 0 0 0 1 1 0 0 1 0 0 1 0 1 1 0 0 0 0 0 0 1 1 1 0 1 1 1
0 1 1 1 1 0 1 1 1 0 0 0 1 1 0 0 1 0 0 1 0 1 1 0 0 0 0 0 0 1 1 1
0 1 1 1 0 1 1 1 1 0 1 1 1 0 0 0 1 1 0 0 1 0 0 1 0 1 1 0 0 0 0 0
0 0 0 0 0 1 1 1 0 1 1 1 1 0 1 1 1 0 0 0 1 1 0 0 1 0 0 1 0 1 1 0
0 1 1 0 0 0 0 0 0 1 1 1 0 1 1 1 1 0 1 1 1 0 0 0 1 1 0 0 1 0 0 1
1 0 0 1 0 1 1 0 0 0 0 0 0 1 1 1 0 1 1 1 1 0 1 1 1 0 0 0 1 1 0 0
1 1 0 0 1 0 0 1 0 1 1 0 0 0 0 0 0 1 1 1 0 1 1 1 1 0 1 1 1 0 0 0
CC2480 Data Sheet SWRS074
Page 30 of 43
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