Digital Media System-on-Chip (DMSoC) Product Preview

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GPIx
GPOx
4
3
2
1
5.6.2 GPIO Peripheral External Interrupts Electrical Data/Timing
EXT_INTx
2
1
TMS320DM355
Digital Media System-on-Chip (DMSoC)
SPRS463A – SEPTEMBER 2007 – REVISED SEPTEMBER 2007
Figure 5-12. GPIO Port Timing
Table 5-12. Timing Requirements for External Interrupts/EDMA Events
(1)
(see Figure 5-13 )
DM355
NO. UNIT
MIN MAX
1 t
w(ILOW)
Width of the external interrupt pulse low 52 ns
2 t
w(IHIGH)
Width of the external interrupt pulse high 52 ns
(1) The pulse width given is sufficient to generate an interrupt or an EDMA event. However, if a user wants to have to recognize the GPIO
changes through software polling of the GPIO register, the GPIO duration must be extended to allow enough time to access the GPIO
register through the internal bus.
Figure 5-13. GPIO External Interrupt Timing
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