SLVSD02D March 2015 – June 2019 TPS65982
In Single Channel Readout mode, the ADC reads a single channel only. Once the channel is selected by firmware, a conversion takes place followed by an interrupt back to the digital core. Figure 5 shows the timing diagram for a conversion starting with an ADC enable. When the ADC is disabled and then enabled, there is an enable time T_ADC_EN (programmable) before sampling occurs. Sampling of the input signal then occurs for time T_SAMPLE (programmable) and the conversion process takes time T_CONVERT (12 clock cycles). After time T_CONVERT, the output data is available for read and an Interrupt is sent to the digital core for time T_INTA (2 clock cycles).
In Single Channel Readout mode, the ADC can be configured to continuously convert that channel. Figure 6 shows the ADC repeated conversion process. In this case, once the interrupt time has passed after a conversion, a new sample and conversion occurs.