Car Door Keypad Using Lin

Posted on Feb 4, 2014

The CDCF5801 provides Clock multiplication from a reference Clock (REFCLK) signal with the unique capability to delay or advance the CLKOUT/CLKOUTB with steps of only 1. 3 mUI through a phase aligner. For every rising edge on the DLYCTRL pin the CLKOUT is delayed by a 1. 3-mUI step size as long as the LEADLAG input detects a low signal at the time o

Car Door Keypad Using Lin
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f the DLYCTRL rising edge. Similarly for every rising edge on the DLYCTRL pin the CLKOUT is advanced by a 1. 3-mUI step size as long as the LEADLAG pin is high during the transition. This unique capability allows the device to phase align (zero delay) between CLKOUT/CLKOUTB and any one other CLK in the system by feeding the Clocks that need to be aligned to the DLYCTRL and the LEADLAG pins. Also it provides the capability to program a fixed delay by providing the proper number of edges on the DLYCTRL pin, while strapping the LEADLAG pin to dc high or low. Further possible applications are: Aligning the rising edge of the output Clock signal to the input Clock rising edge Avoiding PLL instability in applications that require very long PLL feedback lines Isolation of jitter and digital switching noise Limitation of jitter in systems with good ppm frequency stability The CDCF5801 provides Clock multiplication and division from a reference Clock (REFCLK) signal. The device is optimized to have extremely low jitter impact from input to output. The predivider pins MULT[0:1] and post-divider pins P[0:2] provide selection for frequency multiplication and division ratios, generating CLKOUT/CLOUTKB frequencies ranging from 25 MHz to 280 MHz with Clock input references (REFCLK) ranging from 12. 5 MHz to 240 MHz. The selection of pins MULT[0:1] and P[1:2] determines the multiplication value of 1, 2, 4, or 8. The CDCF5801 offers several...

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