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

Documentation Support5.14 Host-Port Interface Timing5.14.1 HPI8 ModeTable 5−31 and Table 5−32 assume testing over recommended operating conditions and H = 0.5t c(CO) (seeFigure 5−27 through Figure 5−30). In the following tables, DS refers to the logical OR of HCS, HDS1, andHDS2. HD refers to any of the HPI data bus pins (HD0, HD1, HD2, etc.). HAD stands for HCNTL0, HCNTL1,and HR/W.Table 5−31. HPI8 Mode Timing Requirements †‡§ MIN MAX UNITtsu(HBV-DSL) Setup time, HBIL valid before DS low 5 nsth(DSL-HBV) Hold time, HBIL valid after DS low 5 nstsu(HSL-DSL) Setup time, HAS low before DS low 5 nstw(DSL) Pulse duration, DS low 20 nstw(DSH) Pulse duration, DS high 10 nstsu(HDV-DSH) Setup time, HDx valid before DS high, HPI write 5 nsth(DSH-HDV)W Hold time, HDx valid after DS high, HPI write 5 ns† DS refers to the logical OR of HCS, HDS1, and HDS2.‡ HDx refers to any of the HPI data bus pins (HD0, HD1, HD2, etc.).§ GPIO refers to the HD pins when they are configured as general-purpose input/outputs.78 SPRS082FApril 1999 − Revised October 2008