Texas Instruments TMS320C6722 Manual do Utilizador descarregar pdf (Página 101)

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4.17.1 Clock Electrical Data/Timing

TMS320C6727, TMS320C6726, TMS320C6722

Floating-Point Digital Signal Processors

SPRS268E – MAY 2005 – REVISED JANUARY 2007

Table 4-39 assumes testing over recommended operating conditions.

Table 4-39. CLKIN Timing Requirements

NO. MIN MAX UNIT

1 f

osc

Oscillator frequency range (OSCIN/OSCOUT) 12 25 MHz

2 t

c(CLKIN)

Cycle time, external clock driven on CLKIN 20 ns

3 t

w(CLKINH)

Pulse width, CLKIN high 0.4t

c(CLKIN)

4 t

w(CLKINL)

Pulse width, CLKIN low 0.4t

c(CLKIN)

5 t

t(CLKIN)

Transition time, CLKIN 5 ns

6 f

PLL

Frequency range of PLL input 12 50 MHz

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Texas Instruments TMS320C6722 Manual do Utilizador Página 101