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TMS320UC5409 Datasheet(PDF) 52 Page - Texas Instruments |
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TMS320UC5409 Datasheet(HTML) 52 Page - Texas Instruments |
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52 / 81 page ![]() TMS320UC5409 FIXEDPOINT DIGITAL SIGNAL PROCESSOR SPRS101E − APRIL 1999 − REVISED OCTOBER 2008 52 POST OFFICE BOX 1443 • HOUSTON, TEXAS 77251−1443 ready timing for externally generated wait states timing requirements for externally generated wait states [H = 0.5 tc(CO)]† (see Figure 20, Figure 21, Figure 22, and Figure 23) MIN MAX UNIT tsu(RDY) Setup time, READY before CLKOUT low 5 ns th(RDY) Hold time, READY after CLKOUT low 0 ns tv(RDY)MSTRB Valid time, READY after MSTRB low‡ 4H−8 ns th(RDY)MSTRB Hold time, READY after MSTRB low‡ 4H ns tv(RDY)IOSTRB Valid time, READY after IOSTRB low‡ 5H−8 ns th(RDY)IOSTRB Hold time, READY after IOSTRB low‡ 5H ns tv(MSCL) Valid time, MSC low after CLKOUT low 0 3 ns tv(MSCH) Valid time, MSC high after CLKOUT low 0 3 ns † The hardware wait states can be used only in conjunction with the software wait states to extend the bus cycles. To generate wait states using READY, at least two software wait states must be programmed. ‡ These timings are included for reference only. The critical timings for READY are those referenced to CLKOUT. MSC MSTRB READY A[19:0] CLKOUT tv(MSCH) tv(MSCL) th(RDY) th(RDY)MSTRB tv(RDY)MSTRB Wait State Generated by READY Wait States Generated Internally tsu(RDY) Figure 20. Memory Read With Externally Generated Wait States Not Recommended For New Designs |
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