AT86RF230_09 ATMEL [ATMEL Corporation], AT86RF230_09 Datasheet - Page 56

• Manufacturer Part Number: AT86RF230_09
• Description: Low Power 2.4 GHz Transceiver for ZigBee, IEEE 802.15.4, 6LoWPAN, RF4CE and ISM
• Manufacturer: ATMEL [ATMEL Corporation]

56
AT86RF230
Bit
0x08
Read/Write
Reset value
Bit
0x08
Read/Write
Reset value
Table 8-5. Status CCA Algorithm
• Bit 6 – CCA_STATUS
CCA_STATUS register bit indicates the result of a CCA request. Each read access to
register 0x01 resets the CCA_STATUS bit.
Table 8-6. Status CCA Result
• Bit 5 – Reserved
• Bit [4:0] – TRX_STATUS
Refer to section 7.1.5.
Register 0x08 (PHY_CC_CCA)
The PHY_CC_CCA register contains register bits to initiate and control the CCA
measurement as well as to set the channel center frequency.
• Bit 7 – CCA_REQUEST
A manual CCA measurement is initiated with setting CCA_REQUEST = 1.
• Bit [6:5] – CCA_MODE
The CCA mode can be selected using register bits CCA_MODE.
Table 8-7. CCA Modes
• Bit [4:0] – CHANNEL
Refer to section 9.7.5.
Register Bit
CCA_DONE
Register Bit
CCA_STATUS
Register Bit
CCA_MODE
CCA_REQUEST
R/W
R/W
7
0
3
1
Value
Value
Value
0
1
0
1
0
1
2
3
R/W
R/W
6
0
2
0
CCA_MODE
Description
CCA calculation in progress
CCA calculation finished
Description
Channel is busy
Channel is idle
Description
Reserved
Mode 1, Energy above threshold
Mode 2, Carrier sense only
Mode 3, Carrier sense with energy above threshold
CHANNEL
R/W
R/W
5
1
1
1
CHANNEL
R/W
R/W
4
0
0
1
5131E-MCU Wireless-02/09
PHY_CC_CCA
PHY_CC_CCA