TMS320UC5409 datasheet(72/81 Pages) TI1

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TMS320UC5409

FIXEDPOINT DIGITAL SIGNAL PROCESSOR

SPRS101E − APRIL 1999 − REVISED OCTOBER 2008

POST OFFICE BOX 1443

• HOUSTON, TEXAS 77251−1443

HPI16 timing

switching characteristics over recommended operating conditions†‡§¶ [H = 0.5tc(CO)]

(see Figure 42 and Figure 43)

PARAMETER

MIN

MAX

UNIT

ten(DSL-HD)

Enable time, Dx driven from DS low

Case 1a: Memory accesses when

DMAC is active in 16-bit mode and

tw(DSH) < 18H

18H+22 – tw(DSH)

td(DSL-HDV1)

Delay time, DS low to Dx valid for an

HPI read

Case 1b: Memory accesses when

DMAC is active in 16-bit mode and

tw(DSH) ≥ 18H

td(DSL-HDV1)

Delay time, DS low to Dx valid for an

HPI read

Case 2a: Memory accesses when

DMAC is inactive and tw(DSH) < 10H

10H+22 – tw(DSH)

Case 2b: Memory accesses when

DMAC is inactive and tw(DSH) ≥ 10H

Case 3: Register accesses

th(DSH-HDV)R

Hold time, Dx valid after DS rising edge, read§

tsu(HDV-HYH)

Setup time, Dx valid before HRDY rising edge

td(DSH-HYL)

Delay time, DS or HCS high to HRDY low‡

td(DSH-HYH)

Delay time, DS high to HRDY high§

Case 1: Memory access when DMAC

is active in 16-bit mode

18H+10

td(DSH-HYH)

Delay time, DS high to HRDY high§

(writes and autoincrement reads)

Case 2: Memory access when DMAC

is inactive

10H+10

td(DSL-HYL)

Delay time, HDS or HCS low/high to HRDY low/high

td(COH−HTH)

Delay time, CLKOUT high to HRDY high

td(COH−GPIO)

Delay time, CLKOUT rising edge to HDx output change. HDx is configured as a

general-purpose output.

NOTE: The HRDY output is always high when the HCS input is high, regardless of DS timings.

† DS refers to the logical OR of HCS, HDS1, or HDS2.

‡ Dx refers to any of the DPI data bus pins (D0, D1, D2, etc.).

§ DMAC stands for direct memory access (DMA) controller. The HPI16 shares the internal DMA bus with the DMAC, thus HPI16 access times

are affected by DMAC activity.

¶ GPIO refers to the HD pins when they are configured as general-purpose input/outputs.

Not Recommended For New Designs

TMS320UC5409 Datasheet(PDF) 72 Page - Texas Instruments

TMS320UC5409 Datasheet(HTML) 72 Page - Texas Instruments

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