ATmega644R212 Atmel Corporation, ATmega644R212 Datasheet - Page 48

• 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

Figure 7-8.
8111C–MCU Wireless–09/09
RX_ON_NOCLK
BUSY_RX_AACK
AACK_NOCLK
(Rx Listen State)
(Receive State)
BUSY_RX_
BUSY_RX
CLKM=OFF
CLKM=OFF
Extended Operating Mode State Diagram
Rejected
Detected
Detected
Detected
Finished
Frame
Frame
Trans-
(all modes except SLEEP)
action
SHR
SHR
SHR
FORCE_TRX_OFF
End
(Power-on after V
RX_AACK_ON
ON_NOCLK
(Rx Listen State)
RX_AACK_
XOSC=ON
P_ON
Pull=ON
RX_ON
CLKM=OFF
6
TRX_OFF
12
From / To
DD
)
1
8
TRX_OFF
(Clock State)
XOSC=ON
PLL_ON
7
Pull=OFF
RX_ON
2
5
9
TX_ARET_ON
Legend:
Blue:
Red:
Green: Event
PLL_ON
13
(PLL State)
(all modes except P_ON)
(Sleep State)
XOSC=OFF
SLEEP
Basic Operating Mode States
Extended Operating Mode States
Pull=OFF
SPI Write to Register TRX_STATE (0x02)
Control signals via IC Pin
4
3
/RST = H
14
SLP_TR=H
TX_START
SLP_TR=H
TX_START
FORCE_PLL_ON
TRX_OFF
From / To
Frame
see notes
10
Frame
End
or
End
or
11
BUSY_TX_ARET
/RST = L
(Transmit State)
(from all states)
BUSY_TX
AT86RF231
RESET
48