参数资料
型号: AT86RF232-ZX
厂商: Atmel
文件页数: 137/175页
文件大小: 0K
描述: 2.4 GHZ ZIGBEE TRANSCEIVER
产品培训模块: AT86RF232 Low Power 2.4 GHz Wireless Transceiver
标准包装: 2,450
频率: 2.4GHz
数据传输率 - 最大: 250kbps
调制或协议: 802.15.4 Zigbee,6LoWPAN,ISM
应用: 通用
功率 - 输出: 3dBm
灵敏度: -100dBm
电源电压: 1.8 V ~ 3.6 V
电流 - 接收: 11.8mA
电流 - 传输: 13.8mA
数据接口: PCB,表面贴装
天线连接器: PCB,表面贴装
工作温度: 0°C ~ 70°C
封装/外壳: 32-VFQFN 裸露焊盘
包装: 托盘
AT86RF232
? Bit 7 - ANT_SEL
Signals selected antenna, related to the last received frame.
Table 11-10. ANT_SEL .
Register Bits
ANT_SEL
Value
0
1
Description
Antenna 0
Antenna 1
Note:
1.
If the autonomous Antenna Diversity algorithm is enabled, the register bit
ANT_SEL maintains its previous value (from the last received frame) until a new
SHR has been found.
This register bit signals the currently selected antenna path. The selection may be
based either on the last antenna diversity cycle (ANT_DIV_EN = 1) or on the content of
register bits ANT_CTRL, for details refer to Section 11.3.2 .
? Bit 3 - ANT_DIV_EN
The register bit ANT_DIV_EN activates the autonomous Antenna Diversity algorithm.
Table 11-11. ANT_DIV_EN.
Register Bits
ANT_DIV_EN
Value
0
1
Description
Antenna Diversity algorithm is disabled
Antenna Diversity algorithm is enabled
Note:
1.
If ANT_DIV_EN = 1 register bit ANT_EXT_SW_EN shall be set to one, too. This is
not automatically done by the hardware.
If register bit ANT_DIV_EN is set the Antenna Diversity algorithm is enabled. On
reception of a frame the algorithm selects an antenna autonomously during SHR
search. This selection is kept until:
? A new SHR search starts
? Leaving receive states
? Register bits ANT_CTRL are manually programmed
? Bit 2 - ANT_EXT_SW_EN
The register bit ANT_EXT_SW_EN controls the external antenna switch.
Table 11-12. ANT_EXT_SW_EN.
Register Bits
ANT_EXT_SW_EN
Value
0
1
Description
Antenna Diversity RF switch control is disabled
Antenna Diversity RF switch control is enabled
If enabled, pin 9 (DIG1) and pin 10 (DIG2) become output pins and provide a differential
control signal for an Antenna Diversity switch. The selection of a specific antenna is
done either by the automated Antenna Diversity algorithm (ANT_DIV_EN = 1), or
according to register bits ANT_CTRL if Antenna Diversity algorithm is disabled.
If the Atmel AT86RF232 is not in a receive or transmit state, it is recommended to
disable register bit ANT_EXT_SW_EN to reduce the power consumption or avoid
leakage current of an external RF switch, especially during SLEEP state. If register bit
ANT_EXT_SW_EN = 0, output pins DIG1 and DIG2 are pulled-down to digital ground.
Pin 10 (DIG2) is overloaded with RX and TX Frame Time Stamping, see Section 11.4 , if
IRQ_2_EXT_EN is set.
137
8321A – MCU Wireless – 10/11
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