ATmega1284PR231 Atmel Corporation, ATmega1284PR231 Datasheet - Page 97

• Manufacturer Part Number: ATmega1284PR231
• Manufacturer: Atmel Corporation

Specifications of ATmega1284PR231

• Flash (kbytes): 128 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): 16
• Eeprom (bytes): 4096
• 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

8.5.6
8111C–MCU Wireless–09/09
Bit
+0x01
Read/Write
Reset Value
Bit
+0x08
Read/Write
Reset Value
Register Description
CCA_REQUEST
CCA_DONE
7
R
0
7
W
0
CCA_STATUS
Register 0x01 (TRX_STATUS):
Two register bits of register 0x01 (TRX_STATUS) signal the status of the CCA measurement.
• Bit 7 - CCA_DONE
This register indicates if a CCA request is completed. This is also indicated by an interrupt
IRQ_4 (CCA_ED_DONE). Note, register bit CCA_DONE is cleared in response to a
CCA_REQUEST.
Table 8-10.
• Bit 6 - CCA_STATUS
After a CCA request is completed the result of the CCA measurement is available in register bit
CCA_STATUS. Note, register bit CCA_STATUS is cleared in response to a CCA_REQUEST.
Table 8-11.
• Bit 5 - Reserved
• Bit [4:0] - TRX_STATUS
tion - Control Registers” on page
Register 0x08 (PHY_CC_CCA):
This register is provided to initiate and control a CCA measurement.
• Bit 7 - CCA_REQUEST
A manual CCA measurement is initiated with setting CCA_REQUEST = 1. The end of the CCA
measurement is indicated by interrupt IRQ_4 (CCA_ED_DONE). Register bits CCA_DONE and
Refer to
Register Bit
CCA_DONE
Register Bit
CCA_STATUS
6
R
0
R/W
6
0
CCA_MODE
Section 7.1.5 “Register Description” on page 44
Reserved
CCA Algorithm Status
CCA Status Result
5
R
0
R/W
5
1
Value
Value
4
R
0
0
1
0
1
R/W
4
0
68.
State Description
CCA calculation not finished
CCA calculation finished
State Description
Channel indicated as busy
Channel indicated as idle
3
R
0
R/W
3
1
TRX_STATUS
CHANNEL
2
R
0
R/W
2
0
and
Section 7.2.7 “Register Descrip-
R/W
1
R
0
1
1
AT86RF231
R/W
0
1
0
R
0
PHY_CC_CCA
TRX_STATUS
97