收藏本站
AT86RF231
Note that IEEE 802.15.4-2006 standard MIC algorithm requires CBC mode encryption only, as it
implements a one-way hash function.
11.1.5
Data Transfer - Fast SRAM Access
The ECB and CBC modules including the AES core are clocked with 16 MHz. One AES opera-
tion takes 24 μs to execute, refer to parameter 12.4.15 in Section 12.4 “Digital Interface Timing
Characteristics” on page 157. That 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 AT86RF231 provides a Fast SRAM access for the
address space 0x82 to 0x94.
Figure 11-5. Packet Structure - Fast SRAM Access Mode
AES run #0
AES run #n
AES access #0
AES access #1
AES access #n+1
MOSI
cmd add cfg P0 P1
... P14 P15 start
cmd add cfg P0 P1
... P14 P15 start
cmd add cfg xx
xx
...
xx
xx start
MISO
stat xx
xx
xx
xx
...
xx
xx
xx
stat xx
xx
xx
C0
... C13 C14 C15
stat xx
xx
xx C0
... C13 C14 C15
Address
0x83
...
0x94
0x83
...
0x94
0x83
...
0x94
byte 0 (cmd)
byte 1 (addr.)
byte 2 (cfg)
byte 3
byte 4
byte 18
byte 19 (start)
MOSI
MISO
SRAM write
PHY_STATUS
address 0x83
XX
<AES_CTRL>
XX
P0[7:0]
XX
P1[7:0]
C0[7:0]
...
...
P15[7:0]
C14[7:0]
<AES_CTRL> (1)
C15[7:0]
Address
0x83
0x84
0x85
0x93
0x94
Note:
Byte 19 is the mirrored version of register AES_CTRL on SRAM address 0x94, see register
description AES_CTRL_MIRROR for details.
In contrast to a standard SRAM access, refer to Section 6.2.3 “SRAM Access Mode” on page
22 , 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) for example in "AES access #1" , see Figure 11-5
on page 132 (lower part), the previous content of the respective AES register C0 is clocked out
at pin 20 (MISO) with an offset of one byte.
In the example shown in Figure 11-5 on page 132 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 ciphertext C0 - C15 from the
first AES run is clocked out at pin MISO. To read the ciphertext 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 0x82 to
0x94.
132
8111C–MCU Wireless–09/09
发布紧急采购，3分钟左右您将得到回复。

采购需求

(若只采购一条型号，填写一行即可)

发布成功！您可以继续发布采购。也可以进入我的后台，查看报价

发布成功！您可以继续发布采购。也可以进入我的后台，查看报价

*型号 *数量 厂商 批号 封装
添加更多采购

我的联系方式

*
*
*
相关PDF资料
AT86RF232-ZX 2.4 GHZ ZIGBEE TRANSCEIVER
AT88CK201BK BRD CRYPTORF READER AT88RF1354
AT88SC-ADK2 KIT ARIS+ DK CRYPTOMEM/COMPANION
AT88SC3216CRF-MY1 IC EEPROM 32KBIT 13MHZ TAG
ATA-2001 LVDT AMPLIFIER
ATAB5429-9-B BOARD BASESTATN UHF RCVR 915MHZ
ATAB5749-3 BOARD XMITTER FOR 315MHZ ATA5749
ATAKSTK511-3 KIT RF MODULE 315MHZ FOR STK500
相关代理商/技术参数
AT86RF231-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
AT86RF231-ZU_09 制造商:ATMEL 制造商全称:ATMEL Corporation 功能描述:Low Power 2.4 GHz Transceiver for ZigBee
AT86RF231-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
AT86RF232-ZX 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
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