AT86RF212 Atmel Corporation, AT86RF212 Datasheet - Page 86

• Manufacturer Part Number: AT86RF212
• Manufacturer: Atmel Corporation

Specifications of AT86RF212

• Max. Operating Frequency: 0 MHz
• Crypto Engine: AES
• Operating Voltage (vcc): 1.8 to 3.6
• 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

6.6.6 Register Description
86
AT86RF212
Table 6-29. CCA Measurement Period and Access in BUSY_RX State
It is recommended to perform CCA measurements in RX_ON state only. To avoid
switching accidentally to BUSY_RX state, the SHR detection can be disabled by setting
register bit RX_PDT_DIS (register 0x15, RX_SYN), refer to section 7.2.3. The receiver
remains in RX_ON state to perform a CCA measurement until the register bit
RX_PDT_DIS is set back to continue the frame reception. In this case, the CCA
measurement duration is 8 symbol periods.
Register 0x01 (TRX_STATUS):
Two register bits of register 0x01 (TRX_STATUS) indicate the status of the CCA
measurement.
Table 6-30. Register 0x01 (TRX_STATUS)
• Bit 7 – CCA_DONE
This register indicates completion a CCA measurement, which is additionally indicated
by the interrupt IRQ_4 (CCA_ED_DONE). Note that register bit CCA_DONE is cleared
in response to a CCA_REQUEST.
Bit
Name
Read/Write
Reset Value
Bit
Name
Read/Write
Reset Value
Note:
CCA Mode
1
2
3
0
1. After detecting the SHR, an automated ED measurement is started with a length of
8 symbol periods (2 symbol periods for high rate PHY modes). This automated ED
measurement must be finished to provide a result for the CCA measurement. Only
one automated ED measurement per frame is performed.
7
CCA_DONE
R
0
3
TRX_STATUS[3]
R
0
Request within ED Measurement
Energy above threshold
CCA result is available after finishing
automated ED measurement period.
Carrier sense only
CCA result is immediately available after request.
Carrier sense with energy above threshold (AND)
CCA result is available after finishing
automated ED measurement period.
Carrier sense with energy above threshold (OR)
CCA result is available after finishing
automated ED measurement period.
6
CCA_STATUS
R
0
2
TRX_STATUS[2]
R
0
(1)
5
Reserved
R
0
1
TRX_STATUS[1]
R
0
Request after ED Measurement
CCA result is immediately available
after request.
CCA result is immediately available
after request.
CCA result is immediately available
after request.
8168C-MCU Wireless-02/10
4
TRX_STATUS[4]
R
0
0
TRX_STATUS[0]
R
0