CMX7163 QAM Modem
CMX7163
This assumes that:
note:
a carrier sense threshold and period
have been defined using the
programming register
Carrier sense process
Clear Command FIFO
Set Modem Control toTxPreamble, Frame
sync and required data type, Rx Frame
sync and required data type.
Mode = Carrier Sense
Here the device is in
receive and searching
for a frame sync, as
well as waiting for a
GPIO trigger to start
Tx triggered on
Yes
GPIO?
Wait for Tx Trigger
note:
the transmission
attempt
GPIO Tx Trigger
IRQ = FS Received
No
Here the device is in
receive and
searching for a frame
sync, as well as
monitoring RSSI
(Carrier sensing)
Yes
Yes
Carrier sense begins
note:
Rx Process
Yes
IRQ = FS Received
No
Rx Process
Yes
IRQ=CS abort
No
Tx Process
Yes
IRQ = CS Tx
Figure 14 Carrier Sense
2014 CML Microsystems Plc
Page 33
D/7163_FI-4.x/12
CMLMICRO [ CML MICROCIRCUITS ]
