SNLS570C August 2017 – January 2023 DS90UB954-Q1
PRODUCTION DATA
When initializing the communications link between the DS90UB954-Q1 deserializer hub and a DS90UB935-Q1 or a DS90UB953-Q1 serializer, the system timing will depend on the mode selected for generating the serializer reference clock. When synchronous clocking mode is selected, the serializer will re-lock onto the extracted back channel reference clock once available so there is no need for local crystal oscillator at the sensor module (Figure 9-3). When the DS90UB935-Q1 or DS90UB953-Q1 is operating in non-synchronous mode, or if connecting to DS90UB933-Q1 or DS90UB913A-Q1 serializer the sensor module requires a local reference clock and timing would follow Figure 9-4.