TMS320VC5505 datasheet(73/141 Pages) TI

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CLKOUT

TMS320VC5505

Fixed-Point Digital Signal Processor

www.ti.com

SPRS503A – JUNE 2009 – REVISED JULY 2009

Table 6-5. Switching Characteristics Over Recommended Operating Conditions for CLKOUT(1)(2)

(see Figure 6-8)

CVDD = 1.05 V

CVDD = 1.3 V

PARAMETER

UNIT

MIN

MAX

MIN

MAX

tc(CLKOUT)

Cycle time, CLKOUT

16.67

tw(CLKOUTH)

Pulse duration, CLKOUT high

7.497

9.163

4.5

5.5

tw(CLKOUTL)

Pulse duration, CLKOUT low

7.497

9.163

4.5

5.5

tt(CLKOUTR)

Transition time (rise), CLKOUT(3)

tt(CLKOUTF)

Transition time (fall), CLKOUT(3)

(1)

The reference points for the rise and fall transitions are measured at VOL MAX and VOH MIN.

(2)

P = 1/SYSCLK clock frequency in nanoseconds (ns). For example, when SYSCLK frequency is 100 MHz, use P = 10 ns.

(3)

Transition time is measured with the slew rate set to FAST and DVDDIO = 1.65 V. (For more detailed information, see the Section 4.6.5,

Output Slew Rate Control Register (OSRCR) [1C16h].).

Figure 6-8. CLKOUT Timing

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