參數(shù)資料
型號(hào)： MJ80C31U-36:D
廠商： ATMEL CORP
元件分類： 微控制器/微處理器
英文描述： MICROCONTROLLER
文件頁數(shù)： 59/101頁
文件大小： 3398K
AT86RF212
6.5.3 Data Interpretation
The PHY_ED_LEVEL (ED) is an 8-bit register. The ED value of the AT86RF212 has a
valid range from 0x00 to 0x54 (0 to 84) with a resolution of about 1 dB. Values 0x55 to
0xFE do not occur and a value of 0xFF indicates the reset value.
An ED value of 0 indicates a receiver input power less than or equal to
RSSI_BASE_VAL [dBm] (refer to Table 6-25); a value of 85 indicates an input power
equal to or larger than (RSSI_BASE_VAL + 87) [dBm].
The receiver input power can be calculated as follows:
PRF [dBm] = RSSI_BASE_VAL + 1.03 ED_LEVEL
Figure 6-4. Mapping between ED Value and Receiver Input Power
0
10
20
30
40
50
60
70
80
90
-100
-80
-60
-40
-20
0
E
D
_L
EV
EL
Receiver Input Power [dBm]
BPSK with 300 kchip/s
BPSK with 600 kchip/s
O-QPSK with 400 kchip/s
O-QPSK with 1000 kchip/s (SIN)
6.5.4 Interrupt Handling
Interrupt IRQ_4 (CCA_ED_DONE) is issued at the end of a manually initiated ED
measurement.
Note that an ED measurement should only be initiated in RX states but not in
RX_AACK
states.
Otherwise,
the
radio
transceiver
generates
an
IRQ_4
(CCA_ED_DONE) without actually performing an ED measurement.
6.5.5 Register Description
Register 0x07 (PHY_ED_LEVEL)
The PHY_ED_LEVEL register contains the result of an ED measurement.
83
8168C-MCU Wireless-02/10
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