Texas Instruments TMS320DM355 Uživatelský manuál stáhnout pdf (Strana 150)

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PRODUCT PREVIEW

RTCK

TDO

TMS320DM355

Digital Media System-on-Chip (DMSoC)

SPRS463A – SEPTEMBER 2007 – REVISED SEPTEMBER 2007

Table 5-49. Switching Characteristics Over Recommended Operating Conditions for JTAG Test Port

(see Figure 5-51 )

DM355

NO. PARAMETER UNIT

MIN MAX

8 t

c(RTCK)

Cycle time, RTCK 20 ns

9 tw(RTCKH) Pulse duration, RTCK high 10

10 tw(RTCKL) Pulse duration, RTCK low 10

11 t

r(all JTAG outputs)

Rise time, all JTAG outputs 1.3 ns

12 t

f(all JTAG outputs)

Fall time, all JTAG outputs 1.3 ns

0.25*tc(RT

13 t

d(RTCKL-TDOV)

Delay time, TCK low to TDO valid 0 ns

CK)

Figure 5-52. JTAG Output Timing

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Texas Instruments TMS320DM355 Uživatelský manuál Strana 150