TMS320VC5409 Fixed-Point Digital Signal ... - Texas Instruments

Documentation Support5.15 GPIO Timing RequirementsTable 5−35 to Table 5−36 assume testing over recommended operating conditions (see Figure 5−33).Table 5−35. GPIO Timing RequirementsMIN MAX UNITtsu(GPIO-COH)th(GPIO-COH)Setup time, GPIOx input valid before CLKOUT high, GPIOx configured asgeneral-purpose input.Hold time, GPIOx input valid after CLKOUT high, GPIOx configured as general-purposeinput.7 ns0 nstd(COH-GPIO)Table 5−36. GPIO Switching CharacteristicsPARAMETER MIN MAX UNITDelay time, CLKOUT high to GPIOx output change. GPIOx configured asgeneral-purpose output.0 6 nsCLKOUTtsu(GPIO-COH)th(GPIO-COH)GPIOx Input Mode†td(COH-GPIO)GPIOx Output Mode†† GPIOx refers to HD0, HD1, HD2, ...HD7, when the HD bus is configured for general-purpose input/output (I/O).Figure 5−33. GPIOx † Timings86 SPRS082FApril 1999 − Revised October 2008