参数资料
型号: AT86RF212-ZUR
厂商: Atmel
文件页数: 64/172页
文件大小: 0K
描述: TXRX AVR LOW PWR/VOLTAGE 32PQFN
标准包装: 1
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: 标准包装
其它名称: AT86RF212-ZURDKR
Bit
3
2
1
0
Name
Read/Write
MAX_CSMA_RETRIES[2:0]
R/W
SLOTTED_OPERATION
R/W
Reset Value
1
0
0
0
? Bit 7:4 – MAX_FRAME_RETRIES
The setting of MAX_FRAME_RETRIES specifies the number of attempts in TX_ARET
mode to automatically retransmit a frame when it was not acknowledged by the
recipient.
? Bit 3:1 – MAX_CSMA_RETRIES
MAX_CSMA_RETRIES specifies the number of retries in TX_ARET mode to repeat the
CSMA-CA procedure before the transaction
gets cancelled. According to
IEEE 802.15.4, the valid range of MAX_CSMA_RETRIES is [0, 1, … , 5].
A value of MAX_CSMA_RETRIES = 7 initiates an immediate frame transmission
without performing CSMA-CA. No retry is performed. This may especially be required
for slotted acknowledgement operation. MAX_CSMA_RETRIES = 6 is reserved.
? Bit 0 – SLOTTED_OPERATION
If set, register bit SLOTTED_OPERATION enables RX_AACK acknowledgment
generation in slotted operation mode, refer to section 5.2.3.5.
Using RX_AACK mode in networks operating in beacon or slotted mode (refer to
IEEE 802.15.4-2006, section 5.5.1), register bit SLOTTED_OPERATION indicates that
acknowledgement frames are to be sent on backoff slot boundaries (slotted
acknowledgement).
If this register bit is set, the acknowledgement frame transmission is initiated by the
microcontroller using the rising edge of pin 11 (SLP_TR).
Register 0x2D (CSMA_SEED_0) :
The CSMA_SEED_0 register is a control register for TX_ARET and contains a part of
the CSMA seed for the CSMA-CA algorithm.
Table 5-26. Register 0x2D (CSMA_SEED_0)
Bit
7
6
5
4
3
2
1
0
Name
Read/Write
CSMA_SEED[7:0]
R/W
Reset Value
1
1
1
0
1
0
1
0
? Bit 7:0 – CSMA_SEED
This register contains the lower 8 bit of the CSMA_SEED, i.e. bits [7:0]. The higher 3 bit
are part of register bits CSMA_SEED_1
(register 0x2E, CSMA_SEED_1).
CSMA_SEED is the seed for the random number generation that determines the length
of the backoff period in the CSMA-CA algorithm.
It is recommended to initialize registers CSMA_SEED with random values. This can be
done using register bits RND_VALUE (register 0x06, PHY_RSSI), refer to section 9.2.
The content of register CSMA_SEED_0/1 initializes the TX_ARET random backoff
generator after wakeup from SLEEP state. It is recommended to reinitialize both
registers before every SLEEP state with a random value.
64
AT86RF212
8168C-MCU Wireless-02/10
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