SMJ320C6414 Datasheet, PDF (128/133 Pages) Texas Instruments – FIXED-POINT DIGITAL SIGNAL PROCESSORS

SMJ320C6414, SMJ320C6415, SMJ320C6416
FIXEDĆPOINT DIGITAL SIGNAL PROCESSORS
SGUS050A − JANUARY 2004 − REVISED MARCH 2004
GENERAL-PURPOSE INPUT/OUTPUT (GPIO) PORT TIMING
timing requirements for GPIO inputs^†‡ (see Figure 62)
NO.
MIN MAX UNIT
1 tw(GPIH)
Pulse duration, GPIx high
8P*
ns
2 tw(GPIL)
Pulse duration, GPIx low
8P*
ns
*This parameter is not production tested.
† _{P = 1/CPU clock frequency in ns. For example, when running parts at 600 MHz, use P = 1.67 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 62)
NO.
PARAMETER
3 tw(GPOH) Pulse duration, GPOx high
4 tw(GPOL) Pulse duration, GPOx low
*This parameter is not production tested.
† _{P = 1/CPU clock frequency in ns. For example, when running parts at 600 MHz, use P = 1.67 ns.}
GPIx
GPOx
2
1
4
3
MIN
32P*
32P*
MAX
UNIT
ns
ns
Figure 62. GPIO Port Timing
128
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