参数资料
型号: MB9BF505NBGL
元件分类: 微控制器/微处理器
英文描述: 32-BIT, FLASH, 80 MHz, RISC MICROCONTROLLER, PBGA112
封装: 10 X 10 MM, 1.45 MM HEIGHT, 0.80 MM PITCH, PLASTIC, FBGA-112
文件页数: 14/120页
文件大小: 1277K
代理商: MB9BF505NBGL
110
8266D-MCU Wireless-06/12
ATmega128RFA1
Register Bits
Value
Description
14
-11.5 dBm
15
-16.5 dBm
9.12.10 PHY_RSSI – Receiver Signal Strength Indicator Register
Bit
7
6
5
4
NA ($146)
RX_CRC_VALID
RND_VALUE1
RND_VALUE0
RSSI4
PHY_RSSI
Read/Write
R
Initial Value
0
Bit
3
2
1
0
NA ($146)
RSSI3
RSSI2
RSSI1
RSSI0
PHY_RSSI
Read/Write
R
Initial Value
0
The PHY_RSSI register is a multi purpose register that indicates FCS validity, provides
random numbers and shows the current RSSI value.
Bit 7 – RX_CRC_VALID - Received Frame CRC Status
Reading this register bit indicates whether the last received frame has a valid FCS or
not. The register bit is updated when issuing a TRX24_RX_END interrupt and remains
valid until the next TRX24_RX_END interrupt is issued, caused by a new frame
reception.
Table 9-39 RX_CRC_VALID Register Bits
Register Bits
Value
Description
0
CRC (FCS) not valid
RX_CRC_VALID
1
CRC (FCS) valid
Bit 6:5 – RND_VALUE1:0 - Random Value
A 2-bit random value can be retrieved by
reading register bits RND_VALUE. The value can be used for random numbers for
security applications. Note that the radio transceiver shall be in Basic Operating Mode
receive state. The values are updated every 1 s.
Bit 4:0 – RSSI4:0 - Receiver Signal Strength Indicator
The result of the automated RSSI measurement is stored in these register bits. The
value is updated every 2s in receive states. The read value is a number between 0
and 28 indicating the received signal strength as a linear curve on a logarithmic input
power scale (dBm) with a resolution of 3 dB. A RSSI value of 0 indicates a RF input
power lower than RSSI_BASE_VAL (-90 dBm). A value of 28 marks a power higher or
equal to -10 dBm.
Table 9-40 RSSI Register Bits
Register Bits
Value
Description
0
Minimum RSSI value: P(RF) < -90 dBm
1
P(RF) = RSSI_BASE_VAL+3 (RSSI-1)
[dBm]
RSSI4:0
2
...
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