ATmega644R212 Atmel Corporation, ATmega644R212 Datasheet - Page 55
ATmega644R212
Manufacturer Part Number
ATmega644R212
Description
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
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7.2.3.2
8111C–MCU Wireless–09/09
Configuration of IEEE Scenarios
are completely independent from RX_AACK mode. Each of these operating modes can be com-
bined with the RX_AACK mode.
Normal Device
Table 7-6 on page 55
ating as a normal device, rather than a PAN coordinator or router.
Table 7-6.
Notes
• If no short address has been configured before the device has been assigned one by the
• In IEEE 802.15.4-2003 standard the frame version subfield did not yet exist but was marked
0x20,0x21
0x22,0x23
• OQPSK_DATA_RATE
• SFD_VALUE
• ANT_DIV
• RX_PDT_LEVEL
Register
Address
PAN-coordinator, only frames directed to either the broadcast address or the IEEE address
are received.
as reserved. According to this standard, reserved fields have to be set to zero. On the other
hand, IEEE 802.15.4-2003 standard requires ignoring reserved bits upon reception. Thus,
there is a contradiction in the standard which can be interpreted in two ways:
...........
0x24,
0x2B
0x0C
0x2C
0x2E
Configuration of IEEE 802.15.4 Devices
Register
Bits
7:6
7
0
shows a typical RX_AACK configuration of an IEEE 802.15.4 device oper-
Register Name
SHORT_ADDR_0/1
PAN_ADDR_0/1
IEEE_ADDR_0
........
IEEE_ADDR_7
RX_SAFE_MODE
SLOTTED_OPERATION
AACK_FVN_MODE
(alternative SFD value)
(blocking frame reception of lower power signals)
(PSDU data rate)
(Antenna Diversity)
Description
Set node addresses
0: disable frame protection
1: enable frame protection
0: if transceiver works in unslotted mode
1: if transceiver works in slotted mode
Controls the ACK behavior, depending on FCF
frame version number
0x00: acknowledges only frames with version
number 0, i.e. according to IEEE 802.15.4-2003
frames
0x01: acknowledges only frames with version
number 0 or 1, i.e. frames according to IEEE
802.15.4-2006
0x10: acknowledges only frames with version
number 0 or 1 or 2
0x11: acknowledges all frames, independent of
the FCF frame version number
AT86RF231
55
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