Preliminary Technical Data UG-1828
Rev. PrB | Page 93 of 277
Example 2: Loading a Larger Set of Frequencies with Manual Table Switch
DWELL
TRANSITION
DWELL
TRANSITION
24159-489
DWELL
t
tableLoad
t
tableLoad
t
TableSwitch
DWELL
TRANSITION
TRANSITION
DWELL
TRANSITION
HOP FRAME
(TABLE A)
HOP FRAME
(TABLE A)
HOP FRAME
(TABLE B)
HOP FRAME
(TABLE B)
HOP
HOP SELECT
CHANNEL SETUP
FH TABLE B
FH TABLE A
Figure 92. Loading a Larger Set of Frequencies with Manual Table Switch
In this example, shown in Figure 92, we demonstrate how to load a larger set of frequencies on the fly, then use a DGPIO pin to switch to
the new table. This is similar to the first example, however it requires an additional signal from the user, namely Hop Select signal to
switch to the new table. User will configure the table mode to automatic increment or index by pin.
User will load a larger frequency hopping table, which will be used in multiple hop frames. Once table loading into memory is complete,
user then sets the Hop Select DGPIO pin, allowing ADRV9001 to start reading from the second table at the next Hop edge.
• User should ensure the Hop Select Pin is set prior to the appropriate channel setup rising edge.
• User can use the Hop Select table pin to force the switch to the second table at any time. ADRV9001 does not require the switch to
happen after completion on the first table.
• This example is also applicable to automatic ping pong mode, as long as user ensures the second hop table is loaded in prior to the
completion of the first table.
Frequency Hopping Table Timing
Time used to load a frequency hopping table in ADRV9001 memory and receive the acknowledgement is still being characterized. This
information will be updated in future releases.
FREQUENCY HOPPING TIMING
In this section, we will show the timing information for different frequency hopping use cases. It is recommended to also read the
Timing Parameters Control in this document because many of the timing parameters are explained there.
24159-590
DWELL
TRANSITION
DWELL
TRANSITION
DWELL
DWELL
TRANSITION TRANSITION
DWELL
TRANSITION
Tx
FRAME
Tx
FRAME
Rx
FRAME
Rx
FRAME
HOP
Tx SETUP
ORx ENABLE
t
NextTxFramePrepare
t
TxSetupTime
t
RxSetupTime
t
hopEdgeToChannelSetupFail
t
hopEdgeToChannelSetupFail
t
ChannelSetupFailEdge
t
ChannelSetupRiseToHopEdge
t
ChannelSetupRiseToHopEdge
t
RxSetupTime
t
TxSetupTime
t
NextTxFramePrepare
t
NextRxFramePrepare
t
NextRxFramePrepare
Figure 93. Frequency Hopping Minimum Timing
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