ATmega644R212 Atmel Corporation, ATmega644R212 Datasheet - Page 158

• 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

Table 12-4.
Notes:
12.5
Table 12-5.
Note:
8111C–MCU Wireless–09/09
12.4.15
12.4.17
12.4.18
No.
12.5.1
12.5.2
12.5.3
12.5.4
12.5.5
12.5.6
12.5.7
12.5.8
12.5.9
1. Maximum pulse width less than (TX frame length + 16 µs)
2. For Fast SRAM read/write accesses on address space 0x82 - 0x94 the time t
General RF Specifications
1. A reference frequency accuracy of ±40 ppm is required by [1], [2].
Symbol
f
f
f
f
f
f
t
B
RF
CH
HDR
PSDU
CHIP
CLK
XTAL
20dB
f
CLKM
t
t
IRQ
13
Digital Interface Timing Characteristics (Continued)
General RF Specifications
BFBP IRQ latency
Interrupt event latency
Clock frequency at pin 17 (CLKM)
Parameter
Frequency range
Channel spacing
Header bit rate (SHR, PHR)
PSDU bit rate
Chip rate
Crystal oscillator frequency
Reference oscillator settling time
Symbol rate deviation
Reference frequency accuracy for
correct functionality
20 dB bandwidth
Test Conditions (unless otherwise stated):
V
DD
= 3.0V, f
RF
= 2.45 GHz, T
Relative to the event to be indicated
Configurable in register 0x03
(TRX_CTRL_0)
Condition
As specified in [1],
As specified in [1],
As specified in [1],
As specified in [1],
OQPSK_DATA_RATE = 1
OQPSK_DATA_RATE = 2
OQPSK_DATA_RATE = 3
As specified in [1], [2]
Reference oscillator
Leaving SLEEP state to clock
available at pin 17 (CLKM)
PSDU bit rate 250 kb/s
PSDU bit rate 500 kb/s
PSDU bit rate 1000 kb/s
PSDU bit rate 2000 kb/s
OP
= 25°C, Measurement setup see
[2]
[2]
[2]
[2]
5
(Min.) increases to 450 ns.
-60
2405
Min.
-40
-40
-30
(1)
Figure 5-1 on page
1000
2000
2000
Typ.
250
250
500
330
62.5
2.8
750
250
16
16
5
9
0
1
2
4
8
AT86RF231
2480
1000
Max
+60
+40
+40
+30
12.
Units
MHz
MHz
kb/s
kb/s
kb/s
kb/s
kb/s
kchip/s
MHz
µs
ppm
ppm
ppm
ppm
MHz
µs
MHz
MHz
MHz
MHz
MHz
MHz
kHz
kHz
ns
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