ATmega644PR231 Atmel Corporation, ATmega644PR231 Datasheet - Page 84
ATmega644PR231
Manufacturer Part Number
ATmega644PR231
Description
Manufacturer
Atmel Corporation
Specifications of ATmega644PR231
Flash (kbytes)
64 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)
4
Eeprom (bytes)
2048
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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8.1.2.6
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
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