TMS320VC5402 datasheet(37/72 Pages) TI1

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TMS320VC5402

FIXEDPOINT DIGITAL SIGNAL PROCESSOR

SPRS079G − OCTOBER 1998 − REVISED OCTOBER 2008

POST OFFICE BOX 1443

• HOUSTON, TEXAS 77251−1443

PARAMETER MEASUREMENT INFORMATION

Transmission Line

4.0 pF

1.85 pF

Z0 = 50

(see note)

Tester Pin Electronics

Data Sheet Timing Reference Point

Output

Under

Test

NOTE: The data sheet provides timing at the device pin. For output timing analysis, the tester pin electronics and its transmission line effects

must taken into account. A transmission line with a delay of 2 ns or longer can be used to produce the desired transmission line effect.

The transmission line is intended as a load only. It is not necessary to add or subtract the transmission line delay (2 ns or longer) from

the data sheet timings.

3.5 nH

Device Pin

(see note)

Input requirements in this data sheet are tested with an input slew rate of < 4 Volts per nanosecond (4 V/ns) at the device pin.

Figure 9. Tester Pin Electronics

internal oscillator with external crystal

The internal oscillator is enabled by connecting a crystal across X1 and X2/CLKIN. The frequency of CLKOUT

is a multiple of the oscillator frequency. The multiply ratio is determined by the bit settings in the CLKMD register.

The crystal should be in fundamental-mode operation, and parallel resonant, with an effective series resistance

of 30

Ω and power dissipation of 1 mW.

The connection of the required circuit, consisting of the crystal and two load capacitors, is shown in Figure 10.

The load capacitors, C1 and C2, should be chosen such that the equation below is satisfied. CL in the equation

is the load specified for the crystal.

1C2

) C

recommended operating conditions of internal oscillator with external crystal (see Figure 10)

MIN

MAX

UNIT

fclock

Input clock frequency

MHz

X2/CLKIN

Crystal

Figure 10. Internal Oscillator With External Crystal

TMS320VC5402 Datasheet(PDF) 37 Page - Texas Instruments

TMS320VC5402 Datasheet(HTML) 37 Page - Texas Instruments

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