ATmega1284PR231 Atmel Corporation, ATmega1284PR231 Datasheet - Page 90

• Manufacturer Part Number: ATmega1284PR231
• Manufacturer: Atmel Corporation

Specifications of ATmega1284PR231

• Flash (kbytes): 128 Kbytes
• Max. Operating Frequency: 20 MHz
• Max I/o Pins: 32
• Spi: 3
• Twi (i2c): 1
• Uart: 2
• Adc Channels: 8
• Adc Resolution (bits): 10
• Adc Speed (ksps): 15
• Analog Comparators: 1
• Crypto Engine: AES
• Sram (kbytes): 16
• Eeprom (bytes): 4096
• Operating Voltage (vcc): 1.8 to 3.6
• Timers: 3
• Frequency Band: 2.4 GHz
• Max Data Rate (mb/s): 2
• Antenna Diversity: Yes
• External Pa Control: Yes
• Power Output (dbm): 3
• Receiver Sensitivity (dbm): -101
• Receive Current Consumption (ma): 13.2
• Transmit Current Consumption (ma): 14.4
• Link Budget (dbm): 104

8.3.4
8111C–MCU Wireless–09/09
Register Description
Figure 8-4.
Register 0x06 (PHY_RSSI):
• Bit 7 - RX_CRC_VALID
Refer to register description in
• Bit [6:5] - RND_VALUE
Refer to register description in section
• Bit [4:0] - RSSI
The result of the automated RSSI measurement is stored in register bits RSSI. The value is
updated every 2 µs 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. An RSSI value of 0
indicates an RF input power of P
P
Bit
+0x06
Read/Write
Reset Value
RF
-100
-10
-20
-30
-40
-50
-60
-70
-80
-90
10
10 dBm (see parameter 12.7.18).
0
0
RX_CRC_VALID
Mapping between RSSI Value and Received Input Power
2
7
R
0
4
Measured
Ideal
6
6
R
0
Section 8.2.5 “Register Description” on page
RND_VALUE
8
RF
< -91 dBm (see parameter 12.7.16), a value of 28 a power of
10
Section 11.2.2 “Register Description” on page
5
R
0
12
4
R
0
14
RSSI
16
3
R
0
18
RSSI
2
R
0
20
22
1
R
0
AT86RF231
87.
24
0
R
0
26
136.
PHY_RSSI
28
30
90