参数资料
型号: AT86RF212-ZU
厂商: Atmel
文件页数: 136/172页
文件大小: 0K
描述: IC TXRX ZIGBE/802.15.4/ISM 32QFN
产品培训模块: MCU Wireless Solutions Product Line Introduction
标准包装: 2,450
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: 托盘
initialization vector is 0. However, for non-compliant usage any other initialization vector
can be used. This operation has to be prepared by the microcontroller.
Note that IEEE 802.15.4-2006 standard MIC algorithm requires CBC mode encryption
only, as it implements a one-way hash function.
9.1.5 Data Transfer – Fast SRAM Access
The ECB and CBC modules, including the AES core, are clocked with 16 MHz. One
AES operation takes 24 μs to execute, refer to parameter 10.4.14 in section 10.4. This
means that the processing of the data is usually faster than the transfer of the data via
the SPI interface.
To reduce the overall processing time, the AT86RF212 provides a Fast SRAM access
for the address space 0x83 to 0x94. The Fast SRAM access allows writing and reading
of data simultaneously during one SPI access for consecutive AES operations ( AES
run ).
For each byte P0 transferred to pin 22 (MOSI), the previous content of the respective
AES register C0 is clocked out at pin 20 (MISO) with an offset of one byte. See Figure
9-5 as an example for “ AES access #1 ”.
Figure 9-5. Packet Structure – Fast SRAM Access Mode
Note:
1. Byte 19 is the mirrored version of register AES_CTRL on SRAM address 0x94;
see register description AES_CTRL_MIRROR for details.
In the example shown in Figure 9-5 the initial plaintext P0 – P15 is written to the SRAM
within “ AES access #0 ”. The last command on address 0x94 (AES_CTRL_MIRROR)
starts the AES operation (“ AES run #0 ”). In the next “ AES access #1 ” new plaintext data
P0 – P15 is written to the SRAM for the second AES run, in parallel the cipher text C0
C15 from the first AES run is clocked out at pin MISO. To read the cipher text from the
last “ AES run #(n) ”, one dummy “ AES access #(n+1) ” is needed.
Note that the SRAM write access always overwrites the previous processing result.
The Fast SRAM access automatically applies to all write operations to SRAM
addresses 0x83 to 0x94.
136
AT86RF212
8168C-MCU Wireless-02/10
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