ATmega644R212 Atmel Corporation, ATmega644R212 Datasheet - Page 84

• 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

8.1.2.6
8.1.2.7
8.1.2.8
8111C–MCU Wireless–09/09
Auxiliary Security Header Field
MAC Service Data Unit (MSDU)
MAC Footer (MFR) Fields
The Auxiliary Security Header specifies information required for security processing and has a
variable length. This field determines how the frame is actually protected (security level) and
which keying material from the MAC security PIB is used (see IEEE 802.15.4-2006, section
7.6.1). This field shall be present only if the Security Enabled subfield b3, see
“Frame Compatibility between IEEE 802.15.4-2003 and IEEE 802.15.4-2006” on page
to one. For details of its structure, see IEEE 802.15.4-2006, section 7.6.2. Auxiliary security
header.
This is the actual MAC payload. It is usually structured according to the individual frame type. A
description can be found in IEEE 802.15.4-2006, section 5.5.3.2.
The MAC footer consists of a two-octet Frame Checksum (FCS), for details refer to
“Frame Check Sequence (FCS)” on page
85.
AT86RF231
Section 8.1.2.3
Section 8.2
83, is set
84