参数资料
型号: AT86RF232-ZX
厂商: Atmel
文件页数: 105/175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
9.3 Frame Buffer
The Atmel AT86RF232 contains a 128 byte dual port SRAM. One port is connected to
the SPI interface, the other to the internal transmitter and receiver modules. For data
communication, both ports are independent and simultaneously accessible.
The Frame Buffer uses the address space 0x00 to 0x7F for RX and TX operation of the
radio transceiver and can keep one IEEE 802.15.4 RX or one TX frame of maximum
length at a time.
Frame Buffer access modes are described in Section 6.2.2 . Frame Buffer access
conflicts are indicated by an under run interrupt IRQ_6 (TRX_UR).
Note:
1.
The IRQ_6 (TRX_UR) interrupt also occurs on the attempt to write frames
longer than 127 octets to the Frame Buffer. In that case the content of the
Frame Buffer cannot be guaranteed.
Frame Buffer access is only possible if the digital voltage regulator (DVREG) is turned
on. This is valid in all device states except in SLEEP state. An access in P_ON state is
possible if pin 17 (CLKM) provides the 1MHz master clock.
9.3.1 Data Management
Data in Frame Buffer (received data or data to be transmitted) remains valid as long as:
? No new frame or other data are written into the buffer over SPI
? No new frame is received (in any BUSY_RX state)
? No state change into SLEEP state is made
? No RESET took place
By default there is no protection of the Frame Buffer against overwriting. Therefore, if a
frame is received during Frame Buffer read access of a previously received frame,
interrupt IRQ_6 (TRX_UR) is issued and the stored data might be overwritten.
Even so, the old frame data can be read, if the SPI data rate is higher than the effective
over air data rate. For a data rate of 250kb/s a minimum SPI clock rate of 1MHz is
recommended. Finally the microcontroller should check the transferred frame data
integrity by an FCS check.
To protect the Frame Buffer content against being overwritten by newly incoming
frames the radio transceiver state should be changed to PLL_ON state after reception.
This can be achieved by writing immediately the command PLL_ON to register bits
TRX_CMD (register 0x02, TRX_STATE) after receiving the frame, indicated by
IRQ_3 (TRX_END).
Alternatively, Dynamic Frame Buffer Protection can be used to protect received frames
against overwriting, for details refer to Section 11.6 .
Both procedures do not protect the Frame Buffer from overwriting by the
microcontroller.
In Extended Operating Mode during TX_ARET operation, see Section 7.2.4 , the radio
transceiver switches to receive, if an acknowledgement of a previously transmitted
frame was requested. During this period received frames are evaluated, but not stored
in the Frame Buffer. This allows the radio transceiver to wait for an acknowledgement
frame and retry the frame transmission without writing them again.
105
8321A – MCU Wireless – 10/11
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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
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