Conversions begin when the START pin is taken high or when the START opcode command is sent. As seen in Figure 49, the DRDY output goes high when conversions are started and goes low when data are ready. Conversions continue indefinitely until the START pin is taken low or the STOP opcode command is transmitted. When the START pin is pulled low or the stop command is issued, the conversion in progress is allowed to complete. Figure 50 and Table 14 show the required DRDY timing to the START pin and the START and STOP opcode commands when controlling conversions in this mode. To keep the converter running continuously, the START pin can be permanently tied high. Note that when switching from pulse mode to continuous mode, the START signal is pulsed or a STOP command must be issued, followed by a START command. This conversion mode is ideal for applications that require a fixed continuous stream of conversions results.
|tSDSU||START pin low or STOP opcode to DRDY setup time to halt further conversions||8||tMOD|
|tDSHD||START pin low or STOP opcode to complete current conversion||8||tMOD|