AD6654/PCB Analog Devices Inc, AD6654/PCB Datasheet - Page 59

• Manufacturer Part Number: AD6654/PCB
• Description: BOARD EVALUATION FOR AD6654
• Manufacturer: Analog Devices Inc

Specifications of AD6654/PCB

• Module/board Type: Evaluation Board
• For Use With/related Products: AD6554
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

Note: When using SPI or SPORT for programming these
registers, the last step in the above procedure needs to be
repeated, that is, the soft synchronization register needs to be
written twice.
Hop with Pin Sync
Four sync pins (SYNC0, SYNC1, SYNC2, and SYNC3) provide
very accurate synchronization among channels. Each channel
can be programmed to look at any of the four sync pins.
count reaches 1, the new frequency and/or phase offset is
loaded into the NCO.
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To control the hop of channel NCO frequencies:
1.
2.
3.
4.
Write the NCO frequency register(s) or phase offset
register(s) to the new value.
Write the NCO frequency hold-off counter(s) to the
appropriate value (greater than 0 and less than 2
Program the channel NCO control registers to monitor
the appropriate SYNC pins.
Write the hop synchronization enable bit and SYNC pin
enable bits high in the pin synchronization configuration
register. This enables the countdown of the frequency
hold-off counter. When the count reaches 1, the new
frequency and/or phase offset is loaded into the NCO.
AD6654
16
).