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4.12.3UHPIElectricalData/Timing
TMS320C6727,TMS320C6726,TMS320C6722
Floating-PointDigitalSignalProcessors
SPRS268E–MAY2005–REVISEDJANUARY2007
4.12.3.1UniversalHost-PortInterface(UHPI)ReadandWriteTiming
Table4-15andTable4-16assumetestingoverrecommendedoperatingconditions(seeFigure4-21
throughFigure4-24).
Table4-15.UHPIReadandWriteTimingRequirements
(1)(2)
NO.MINMAXUNIT
9t
su(HASL-DSL)
Setuptime,UHPI_HASlowbeforeDSfallingedge5ns
10t
h(DSL-HASL)
Holdtime,UHPI_HASlowafterDSfallingedge2ns
11t
su(HAD-HASL)
Setuptime,HADvalidbeforeUHPI_HASfallingedge5ns
12t
h(HASL-HAD)
Holdtime,HADvalidafterUHPI_HASfallingedge5ns
13t
w(DSL)
Pulseduration,DSlow15ns
14t
w(DSH)
Pulseduration,DShigh2Pns
15t
su(HAD-DSL)
Setuptime,HADvalidbeforeDSfallingedge5ns
16t
h(DSL-HAD)
Holdtime,HADvalidafterDSfallingedge5ns
17t
su(HD-DSH)
Setuptime,HDvalidbeforeDSrisingedge5ns
18t
h(DSH-HD)
Holdtime,HDvalidafterDSrisingedge0ns
37t
su(HCSL-DSL)
Setuptime,UHPI_HCSlowbeforeDSfallingedge0ns
38t
h(HRDYH-DSL)
Holdtime,DSlowafterUHPI_HRDYrisingedge1ns
(1)P=SYSCLK2period
(2)DSreferstoHSTROBE.HDreferstoUHPI_HD[31:0].HDSreferstoUHPI_HDS[1]orUHPI_HDS[2].HADreferstoUHPI_HCNTL[0],
UHPI_HCNTL[1],UHPI_HHWIL,andUHPI_HRW.
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