10.2. Timing requirements

To enable the ARM9TDMI processor core to be tracked correctly, all inputs must be synchronous to the ARM9TDMI processor clock. These inputs include TCK, that in tracking mode is latched on the falling edge of GCLK before it is driven onto the ARM922T tracking outputs. All other TCK relative signals, TDI, TMS, and SDOUTBS, are latched on rising GCLK before they are driven onto the ARM922T tracking outputs.

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