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The ratio for the input (CLK) and output (TCK) frequencies is 14:1 during a shift; it takes 14 input clocks to complete a TCK data shift operation. This is due to the state machine that is implemented as part of the System ACE Player IP provided in(XAPP424).
As an example, if a customer needs a 10 MHz TCK on the JTAG chain, the input CLK frequency should be 140 MHz.
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