ATmega1284PR231 Atmel Corporation, ATmega1284PR231 Datasheet - Page 93
ATmega1284PR231
Manufacturer Part Number
ATmega1284PR231
Description
Manufacturer
Atmel Corporation
Datasheets
1.AT86RF231.pdf
(198 pages)
2.ATMEGA1284PR231.pdf
(380 pages)
3.ATMEGA1284PR231.pdf
(20 pages)
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
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8.4.5
8111C–MCU Wireless–09/09
Register Description
Register 0x07 (PHY_ED_LEVEL):
The PHY_ED_LEVEL register contains the result of an ED measurement.
• Bit [7:0] - ED_LEVEL
The minimum ED value (ED_LEVEL = 0) indicates receiver power less than or equal to
RSSI_BASE_VAL. The range is 84 dB with a resolution of 1 dB and an absolute accuracy of
±5 dB. A manual ED measurement can be initiated by a write access to the register. A value
0xFF signals that a measurement has never been started yet (reset value).
The measurement duration is 8 symbol periods (128 µs) for a data rate of 250 kb/s.
For High Data Rate Modes the automated measurement duration is reduced to 32 µs, refer to
Section 11.3 “High Data Rate Modes” on page
these modes the measurement period is still 128 µs as long as the receiver is in RX_ON state.
A value other than 0xFF indicates the result of the last ED measurement.
Bit
+0x07
Read/Write
Reset Value
7
R
1
6
R
1
5
R
1
ED_LEVEL[7:0]
4
R
1
137. For manually initiated ED measurements in
3
R
1
2
R
1
1
R
1
AT86RF231
0
R
1
PHY_ED_LEVEL
93
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