ATmega644R212 Atmel Corporation, ATmega644R212 Datasheet - Page 33

• 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

7. Operating Modes
7.1
Figure 7-1.
7.1.1
8111C–MCU Wireless–09/09
Basic Operating Mode
RX_ON_NOCLK
State Control
(Rx Listen State)
(Receive State)
BUSY_RX
CLKM=OFF
Basic Operating Mode State Diagram (for timing refer to
This section summarizes all states to provide the basic functionality of the AT86RF231, such as
receiving and transmitting frames, the power up sequence and sleep. The Basic Operating
Mode is designed for IEEE 802.15.4 and ISM applications; the corresponding radio transceiver
states are shown in
The radio transceiver states are controlled either by writing commands to register bits
TRX_CMD (register 0x02, TRX_STATE), or directly by two signal pins: pin 11 (SLP_TR) and
Detected
Frame
(all states except SLEEP)
SHR
FORCE_TRX_OFF
End
(Power-on after V
(Rx Listen State)
XOSC=ON
P_ON
Pull=ON
RX_ON
6
12
Figure 7.1 on page
DD
)
(all states except SLEEP,
P_ON, TRX_OFF, RX_ON_NOCLK)
FORCE_PLL_ON
1
8
TRX_OFF
(Clock State)
XOSC=ON
PLL_ON
7
Pull=OFF
RX_ON
2
5
9
33.
14
Table 7-1 on page
13
PLL_ON
(PLL State)
(all states except P_ON)
(Sleep State)
XOSC=OFF
SLEEP
Pull=OFF
4
Legend:
Blue:
Red:
Green: Event
3
/RST = H
X
State transition number, see Table 7-1
Basic Operating Mode States
SPI Write to Register TRX_STATE (0x02)
Control signals via IC Pin
SLP_TR = H
TX_START
11
42)
or
Frame
End
10
/RST = L
(Transmit State)
AT86RF231
(from all states)
BUSY_TX
RESET
33