CMOSTEK CMT2300A - CMT2300 A Pin Descriptions

AN146
Rev 0.9 | Page 15/25
www.cmostek.com
Figure 12. Channel Sensing Mechanism
It should be noted that the PJD can only be used in FSK mode; the RSSI contrast can be used in both
FSK and OOK modes.
2.3.1 Register associated with channel sensing
The corresponding RFPDK interface and parameters are as below:
Figure 13. Channel Sensing RFPDK Interface
Table 14. Channel Sensing Related Parameter
Register Bit RFPDK Parameter
Register Bit
RSSI Valid Source
CCA_INT_SEL<1:0>
PJD Window
PJD_WIN_SEL<1:0>
The contents and explanations of the register can be seen in the following table.
Table 15. Register Located in the Configuration Bank
Register
Name
Bits
R/W
Bit Name
Function Description
CUS_SYS11
(0x16)
7
RW
PJD_TH_SEL
PJD's hidden configuration bit can be fixed to 0.
6:5
RW
CCA_INT_SEL<1:0>
Channel sensing mode option:
0：Determine whether there is a signal by PJD's
RSSI 对比
相位跳变检测
（PJD）
0
2
1
CCA_INT_SEL<1:0>
RSSI_VLD
RSSI
Contrast
Phase Jump
Detector(PJD)