ZHCSFB4A July 2016 – January 2024 DS90UB964-Q1
PRODUCTION DATA
A valid 23MHz to 25MHz reference clock is required on the REFCLK pin 5 for precise frequency operation. The REFCLK frequency defines all internal clock timers, including the back channel rate, I2C timers, CSI-2 data-rate, FrameSync signal parameters, and other timing critical internal circuitry. REFCLK input must be continuous. If the REFCLK input does not detect a transition for more than 20µs, this can cause a disruption in the CSI-2 output. REFCLK can be applied to the DS90UB964-Q1 only when the supply rails are above minimum levels (see Figure 6-11).
The REFCLK LVCMOS input oscillator specifications are listed in Table 5-3.
PARAMETER | TEST CONDITIONS | MIN | TYP | MAX | UNIT | |
---|---|---|---|---|---|---|
REFERENCE CLOCK | ||||||
Frequency tolerance | ±100 | ppm | ||||
Duty cycle | 40% | 50% | 60% | |||
Rise/Fall Time | 10% - 90% | 8 | ns | |||
Jitter | 500kHz - 50MHz | 50 | 80 | ps p-p | ||
Frequency | 23 | 25 | MHz |