TMS320VC5416 datasheet(86/98 Pages) TI1

86 / 98 page

TMS320VC5416

Fixed-Point Digital Signal Processor

SPRS095P – MARCH 1999 – REVISED OCTOBER 2008

www.ti.com

Table 5-33. HPI8 Mode Switching Characteristics

5416-120

5416-160

PARAMETER

UNIT

MIN

MAX

ten(DSL-HD)

Enable time, HD driven from DS low

Case 1a: Memory accesses when DMAC is active

36P + 10 –

in 32-bit mode and tw(DSH) < 36P

(1)

tw(DSH)

Case 1b: Memory accesses when DMAC is active

in 32-bit mode and tw(DSH) ≥ 36P

(1)

Case 1c: Memory accesses when DMAC is active

18P + 10 –

in 16-bit mode and tw(DSH) < I8P

(1)

tw(DSH)

Delay time, DS low to HD valid

td(DSL-HDV1)

Case 1d: Memory accesses when DMAC is active

for first byte of an HPI read

in 16-bit mode and tw(DSH) ≥ I8P

(1)

Case 2a: Memory accesses when DMAC is inactive

10P + 10 –

and tw(DSH) < 10P

(1)

tw(DSH)

Case 2b: Memory accesses when DMAC is inactive

and tw(DSH) ≥ 10P

(1)

Case 3: Register accesses

td(DSL-HDV2)

Delay time, DS low to HD valid for second byte of an HPI read

th(DSH-HDV)R

Hold time, HD valid after DS high, for a HPI read

tv(HYH-HDV)

Valid time, HD valid after HRDY high

td(DSH-HYL)

Delay time, DS high to HRDY low(2)

Case 1a: Memory accesses when DMAC is active

18P + 6

in 16-bit mode(1)

Case 1b: Memory accesses when DMAC is active

36P + 6

Delay time, DS high to HRDY

in 32-bit mode(1)

td(DSH-HYH)

high(2)

Case 2: Memory accesses when DMAC is

10P + 6

inactive(1)

Case 3: Write accesses to HPIC register(3)

6P + 6

td(HCS-HRDY)

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

td(COH-HYH)

Delay time, CLKOUT high to HRDY high

td(COH-HTX)

Delay time, CLKOUT high to HINT change

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

td(COH-GPIO)

general-purpose output

(1)

DMAS stands for direct memory access controller. The HPI8 shares the internal DMA bus with the DMAC, thus HPI8 access times are

affected by DMAC activity.

(2)

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

(3)

This timing applies when writing a one to the DSPINT bit or HINT bit of the HPIC register. All other writes to the HPIC occur

asynchronously, and do not cause HRDY to be deasserted.

Electrical Specifications

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