ZHCSQQ1B june 2022 – august 2023 ADC32RF54 , ADC32RF55
PRODUCTION DATA
The ADC32RF5x supports several different options to update the NCO frequencies. Fast frequency hopping can be achieved in one of the following ways:
| NCO CONTROL | SCLK | SDIO | SPISEL | GPIO1 | GPIO2 | NCO SEL MODE |
|---|---|---|---|---|---|---|
| Regular SPI (default) | SPI Interface | 0 | used for other purpose | 00 | ||
| GPIO1/2 | SPI Interface | 0 | used for NCO control | 00 | ||
| GPIO1/2, SPISEL, SCLK/SDIO | NCO CONTROL | 1 | used for NCO control | 00 | ||
| FAST SPI | SPI Interface | 1 | SDIO | SCLK | 10 | |
The internal NCO is switched quickly; however, the switching time depends primarily on the time it takes to flush out the decimation filter as shown in Table 7-28.
| Decimation Setting | NCO Switching Time |
|---|---|
| /4 | ~ 250 ns |
| /8 | ~ 350 ns |
| /16 | ~ 600 ns |
| /32 | ~ 1 us |
| /64 | ~ 2 us |
| /128 | ~ 4 us |