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AT86RF232
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/DIG2 are pulled-down to digital ground.
User Defined Antenna Selection
A microcontroller defined selection of a certain antenna can be done by disabling the
automated Antenna Diversity algorithm (ANT_DIV_EN = 0) and selecting one antenna
using register bits ANT_CTRL = 1 / 2.
The antenna defined by register bits ANT_CTRL (register 0x0D, ANT_DIV) is used for
transmission and reception.
Autonomous Antenna Selection
The
autonomous
Antenna Diversity algorithm is enabled with register bits
ANT_DIV_EN = 1 and ANT_CTRL = 0 / 3 (register 0x0D, ANT_DIV). It allows the use of
Antenna Diversity even if the microcontroller does currently not control the radio
transceiver, for instance in Extended Operating Mode.
Upon reception of a frame the AT86RF232 selects one antenna. The selected antenna
is then indicated by register bit ANT_SEL (register 0x0D, ANT_DIV). If required, it is
recommended to read register bit ANT_SEL after IRQ_2 (RX_START). After the frame
reception is completed, the antenna selection continues searching for new frames on
both antennas. However, the register bit ANT_SEL maintains its previous value (from
the last received frame) until a new IEEE 802.15.4 frame has been detected, and the
selection algorithm locked into one antenna again. At this time the register bit ANT_SEL
is updated again.
If a device is in RX_AACK mode, receiving a frame containing an ACK request, the
ACK frame is transmitted using the same antenna as used during receive.
If a device performs a transaction in TX_ARET mode, it starts to listen for an ACK on
the transmit antenna. If no ACK was received, the next transmission attempt is done on
the other transmit antenna. This will be repeated with each retry.
11.3.3 Antenna Diversity Sensitivity Control
Due to a different receive algorithm used by the Antenna Diversity algorithm, the
correlator threshold of the receiver has to be adjusted. It is recommended to set register
bits PDT_THRES (register 0x0A, RX_CTRL) to three.
135
8321A – MCU Wireless – 10/11
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相关代理商/技术参数
AT86RF232-ZXR 功能描述:射频收发器 2.4 GHZ ZIGBEE TRANSCEIVER RoHS:否 制造商:Atmel 频率范围:2322 MHz to 2527 MHz 最大数据速率:2000 Kbps 调制格式:OQPSK 输出功率:4 dBm 类型: 工作电源电压:1.8 V to 3.6 V 最大工作温度:+ 85 C 接口类型:SPI 封装 / 箱体:QFN-32 封装:Tray
AT86RF233-ZF 功能描述:IC RF TXRX+MCU 802.15.4 32-VFQFN 制造商:microchip technology 系列:- 包装:托盘 零件状态:在售 类型:TxRx + MCU 射频系列/标准:802.15.4，通用 ISM > 1GHz 协议:6LoWPAN，Zigbee? 调制:O-QPSK 频率:2.4GHz 数据速率（最大值）:2Mbps 功率 - 输出:4dBm 灵敏度:-101dBm 存储容量:128B SRAM 串行接口:SPI 电压 - 电源:1.8 V ~ 3.6 V 电流 - 接收:11.3mA ~ 11.8mA 电流 - 传输:7.2mA ~ 13.8mA 工作温度:-40°C ~ 125°C 封装/外壳:32-VFQFN 裸露焊盘 标准包装:490
AT86RF233-ZFR 功能描述:IC RF TXRX+MCU 802.15.4 32-VFQFN 制造商:microchip technology 系列:- 包装:剪切带（CT） 零件状态:在售 类型:TxRx + MCU 射频系列/标准:802.15.4，通用 ISM > 1GHz 协议:6LoWPAN，Zigbee? 调制:O-QPSK 频率:2.4GHz 数据速率（最大值）:2Mbps 功率 - 输出:4dBm 灵敏度:-101dBm 存储容量:128B SRAM 串行接口:SPI 电压 - 电源:1.8 V ~ 3.6 V 电流 - 接收:11.3mA ~ 11.8mA 电流 - 传输:7.2mA ~ 13.8mA 工作温度:-40°C ~ 125°C 封装/外壳:32-VFQFN 裸露焊盘 标准包装:1
AT86RF233-ZU 功能描述:射频收发器 2.4GHz ZigBee Transceiver RoHS:否 制造商:Atmel 频率范围:2322 MHz to 2527 MHz 最大数据速率:2000 Kbps 调制格式:OQPSK 输出功率:4 dBm 类型: 工作电源电压:1.8 V to 3.6 V 最大工作温度:+ 85 C 接口类型:SPI 封装 / 箱体:QFN-32 封装:Tray
AT86RF233-ZUR 功能描述:射频收发器 2.4GHz ZigBee Transceiver RoHS:否 制造商:Atmel 频率范围:2322 MHz to 2527 MHz 最大数据速率:2000 Kbps 调制格式:OQPSK 输出功率:4 dBm 类型: 工作电源电压:1.8 V to 3.6 V 最大工作温度:+ 85 C 接口类型:SPI 封装 / 箱体:QFN-32 封装:Tray
AT86RF233-ZUS 功能描述:IC RF TxRx + MCU 802.15.4, General ISM > 1GHz 6LoWPAN, Zigbee? 2.4GHz 32-VFQFN Exposed Pad 制造商:atmel 系列:- 包装:托盘 零件状态:过期 类型:TxRx + MCU 射频系列/标准:802.15.4，通用 ISM > 1GHz 协议:6LoWPAN，Zigbee? 调制:O-QPSK 频率:2.4GHz 数据速率（最大值）:2Mbps 功率 - 输出:4dBm 灵敏度:-101dBm 存储容量:128B SRAM 串行接口:SPI GPIO:- 电压 - 电源:1.8 V ~ 3.6 V 电流 - 接收:11.3mA ~ 11.8mA 电流 - 传输:7.2mA ~ 13.8mA 工作温度:-40°C ~ 85°C 封装/外壳:32-VFQFN 裸露焊盘 标准包装:490
AT86RF401 制造商:ATMEL 制造商全称:ATMEL Corporation 功能描述:Smart RF Wireless Data Microtransmitter
AT86RF401E 制造商:ATMEL 制造商全称:ATMEL Corporation 功能描述:Smart RF Wireless Data Microtransmitter