ATmega644PR231 Atmel Corporation, ATmega644PR231 Datasheet - Page 68

• Manufacturer Part Number: ATmega644PR231
• 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

7.2.6
7.2.7
8111C–MCU Wireless–09/09
Bit
+0x01
Read/Write
Reset Value
Register Summary
Register Description - Control Registers
CCA_DONE
7
R
0
CCA_STATUS
The following registers are to be configured to control the Extended Operating Mode:
Table 7-14.
Register 0x01 (TRX_STATUS):
The read-only register TRX_STATUS signals the present state of the radio transceiver as well
as the status of a CCA application. A state change is initiated by writing a state transition com-
mand to register bits TRX_CMD (register 0x02, TRX_STATE).
• Bit 7 - CCA_DONE
Refer to
Operating Mode.
• Bit 6 - CCA_STATUS
Refer to
Operating Mode.
• Bit 5 - Reserved
• Bit [4:0] - TRX_STATUS
The register bits TRX_STATUS signal the current radio transceiver status.
Reg.-Addr
0x01
0x02
0x04
0x08
0x09
0x17
0x20 - 0x2B
0x2C
0x2D
0x2E
0x2F
6
R
0
Section 8.5 “Clear Channel Assessment (CCA)” on page
Section 8.5 “Clear Channel Assessment (CCA)” on page
Reserved
Register Summary
5
Register Name
TRX_STATUS
TRX_STATE
TRX_CTRL_1
PHY_CC_CCA
CCA_THRES
XAH_CTRL_1
XAH_CTRL_0
CSMA_SEED_0
CSMA_SEED_1
CSMA_BE
R
0
4
R
0
Description
Radio transceiver state control, TX_ARET status
Radio transceiver status, CCA result
TX_AUTO_CRC_ON
CCA mode control, see
CCA threshold settings, see
RX_AACK control
Address filter configuration
-
TX_ARET control, retries value control
CSMA-CA seed value
CSMA-CA seed value, RX_AACK control
CSMA-CA back-off exponent control
3
R
0
Short address, PAN-ID and IEEE address
TRX_STATUS
2
R
0
Section 8.5.6
Section 8.5.6
1
R
0
94, not updated in Extended
94, not updated in Extended
AT86RF231
0
R
0
TRX_STATUS
68