ATmega1284PR231 Atmel Corporation, ATmega1284PR231 Datasheet - Page 80

• 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

8.1.2
Figure 8-2.
8.1.2.1
8.1.2.2
Figure 8-3.
8111C–MCU Wireless–09/09
0
0
FCF
Frame Type
MAC Protocol Layer Data Unit (MPDU)
Frame Type
1
MAC Header (MHR) Fields
Frame Control Field (FCF)
IEEE 802.15.4 Frame Format - MAC-Layer Frame Structure (MPDU)
IEEE 802.15.4-2006 Frame Control Field (FCF)
1
2
Sequence
Number
2
Enabled
Sec.
3
Received frames with a frame length field set to 0x00 (invalid PHR) are not signaled to the
microcontroller.
Table 8-1 on page 80
Table 8-1.
Figure 8-2 on page 80
The MAC header consists of the Frame Control Field (FCF), a sequence number, and the
addressing fields (which are of variable length, and can even be empty in certain situations).
The FCF consists of 16 bits, and occupies the first two octets of the MPDU or PSDU,
respectively.
Enabled
Sec.
3
Pending
Frame
Destination
MAC Header (MHR)
PAN ID
4
Pending
Frame
4
Request
ACK
9 - aMaxPHYPacketSize
5
0/4/6/8/10/12/14/16/18/20 octets
Frame Length Value
Request
Destination
Frame Length Field - PHR
address
ACK
5
Addressing Fields
PAN
Intra
6
Frame Control Field 2 octets
0 - 4
6 - 8
summarizes the type of payload versus the frame length value.
5
Intra
PAN
shows the frame structure of the MAC layer.
6
MAC Protocol Data Unit (MPDU)
Source
PAN ID
Frame Control Field 2 octets
7
Reserved
7
8
address
Source
Reserved
8
9
addressing mode
Auxiliary Security Header
10
9
Destination
0/5/6/10/14 octets
Payload
Reserved
MPDU (Acknowledgement)
Reserved
MPDU
addressing mode
MAC Service Data Unit (MSDU)
11
10
Destination
Frame Version
12
MAC Payload
11
13
Frame Version
12
addressing mode
14
Source
13
AT86RF231
15
addressing mode
CRC-16
2 octets
14
Source
(MFR)
FCS
15
80