TMP32C6411ZLZ datasheet(114/119 Pages) TI

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TMS320C6411

FIXEDPOINT DIGITAL SIGNAL PROCESSOR

SPRS196H − MARCH 2002 − REVISED JULY 2004

114

POST OFFICE BOX 1443

• HOUSTON, TEXAS 77251−1443

GENERAL-PURPOSE INPUT/OUTPUT (GPIO) PORT TIMING

timing requirements for GPIO inputs†‡ (see Figure 58)

NO.

−300

UNIT

NO.

MIN

MAX

UNIT

tw(GPIH)

Pulse duration, GPIx high

tw(GPIL)

Pulse duration, GPIx low

† P = 1/CPU clock frequency in ns. For example, when running parts at 300 MHz, use P = 3.33 ns.

‡ The pulse width given is sufficient to generate a CPU interrupt or an EDMA event. However, if a user wants to have the DSP recognize the GPIx

changes through software polling of the GPIO register, the GPIx duration must be extended to at least 12P to allow the DSP enough time to access

the GPIO register through the CFGBUS.

switching characteristics over recommended operating conditions for GPIO outputs†

(see Figure 58)

NO.

PARAMETER

−300

UNIT

NO.

PARAMETER

MIN

MAX

UNIT

tw(GPOH)

Pulse duration, GPOx high

24P − 8‡

tw(GPOL)

Pulse duration, GPOx low

24P − 8‡

† P = 1/CPU clock frequency in ns. For example, when running parts at 300 MHz, use P = 3.33 ns.

‡ This parameter value should not be used as a maximum performance specification. Actual performance of back-to-back accesses of the GPIO

is dependent upon internal bus activity.

GPIx

GPOx

Figure 58. GPIO Port Timing

TMP32C6411ZLZ Datasheet(PDF) 114 Page - Texas Instruments

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