ATmega644R212 Atmel Corporation, ATmega644R212 Datasheet - Page 106

• Manufacturer Part Number: ATmega644R212
• Manufacturer: Atmel Corporation

Specifications of ATmega644R212

• Flash (kbytes): 64 Kbytes
• Max. Operating Frequency: 20 MHz
• Max I/o Pins: 32
• Spi: 3
• Twi (i2c): 1
• Uart: 1
• Adc Channels: 8
• Adc Resolution (bits): 10
• Adc Speed (ksps): 15
• Analog Comparators: 1
• Crypto Engine: AES
• Sram (kbytes): 4
• Eeprom (bytes): 2048
• Operating Voltage (vcc): 1.8 to 3.6
• Timers: 3
• Frequency Band: 700/800/900MHz
• Max Data Rate (mb/s): 1
• Antenna Diversity: No
• External Pa Control: Yes
• Power Output (dbm): 10
• Receiver Sensitivity (dbm): -110
• Receive Current Consumption (ma): 9.0
• Transmit Current Consumption (ma): 18 at 5dBm
• Link Budget (dbm): 120

8111C–MCU Wireless–09/09
• Bit [5:4] - PA_LT
These register bits control the enable lead time of the internal PA relative to the beginning of the
transmitted frame.
Table 9-3.
• Bit [3:0] - TX_PWR
These register bits determine the TX output power of the AT86RF231.
Table 9-4.
Register Bits
PA_LT
Register Bits
TX_PWR
PA Enable Time Relative to the Start of the Frame (SHR)
AT86RF231 TX Output Power Setting
Value
Value
0xA
0xB
0xC
0xD
0xE
0xF
0x0
0x1
0x2
0x3
0x4
0x5
0x6
0x7
0x8
0x9
0
1
2
3
TX Output Power [dBm]
PA Lead Time [µs]
3.0
2.8
2.3
1.8
1.3
0.7
0.0
-12
-17
-1
-2
-3
-4
-5
-7
-9
2
4
6
8
AT86RF231
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