参数资料
型号: AT86RF212-ZUR
厂商: Atmel
文件页数: 84/172页
文件大小: 0K
描述: TXRX AVR LOW PWR/VOLTAGE 32PQFN
标准包装: 1
频率: 700MHz,800MHz,900MHz
数据传输率 - 最大: 250kbps
调制或协议: 802.15.4 Zigbee,6LoWPAN,ISM
应用: ISM,ZigBee?
功率 - 输出: 10dBm
灵敏度: -110dBm
电源电压: 1.8 V ~ 3.6 V
电流 - 接收: 9.2mA
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-VFQFN 裸露焊盘
包装: 标准包装
其它名称: AT86RF212-ZURDKR
Table 6-27. Register 0x07 (PHY_ED_LEVEL)
Bit
7
6
5
4
3
2
1
0
Name
ED_LEVEL[7:0]
Read/Write
R
(1)
Reset Value
1
1
1
1
1
1
1
1
Note:
1. A write access is required for initiation of a manual ED measurement.
Bit 7:0 – ED_LEVEL
The measured ED value has a valid range from 0x00 to 0x54 (0 to 84). The value 0xFF
indicates that a measurement has never been started (reset value).
A manual ED measurement can be initiated by a write access to the register.
6.6 Clear Channel Assessment (CCA)
The main features of the Clear Channel Assessment (CCA) module are:
? All four CCA modes are provided as defined in IEEE 802.15.4-2006
? Adjustable threshold for energy detection algorithm
6.6.1 Overview
A CCA measurement is used to detect a clear channel. Four CCA modes are specified
by IEEE 802.15.4-2006:
Table 6-28. CCA Mode Overview
CCA Mode
1
2
0, 3
Description
Energy above threshold:
CCA shall report a busy medium upon detecting any energy above the ED
threshold.
Carrier sense only:
CCA shall report a busy medium only upon the detection of a signal with the
modulation and spreading characteristics of an IEEE 802.15.4 compliant signal.
The signal strength may be above or below the ED threshold.
Carrier sense with energy above threshold:
CCA shall report a busy medium using a logical combination of
-
-
detection of a signal with the modulation and spreading characteristics of
this standard and/or
energy above the ED threshold,
where the logical operator may be configured as either OR (mode 0) or AND
(mode 3).
6.6.2 Configuration and Request
The CCA modes are configurable via register 0x08 (PHY_CC_CCA).
When being in Basic Operating Mode, a CCA request can be initiated manually by
setting CCA_REQUEST = 1 (register 0x08, PHY_CC_CCA) if the AT86RF212 is in any
RX state. The current channel status (CCA_STATUS) and the CCA completion status
(CCA_DONE) are accessible through register 0x01 (TRX_STATUS).
The end of a manually initiated CCA (8 symbol periods plus 12 μs processing delay) is
indicated by the interrupt IRQ_4 (CCA_ED_DONE).
84
AT86RF212
8168C-MCU Wireless-02/10
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