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TNETV1647GSTZWT 数据表(PDF) 124 Page - Texas Instruments

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部件名 TNETV1647GSTZWT
功能描述  Digital Media System-on-Chip
PDF  236 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
制造商  TI1 [Texas Instruments]
网页  http://www.ti.com
标志 TI1 - Texas Instruments

TNETV1647GSTZWT 数据表(HTML) 124 Page - Texas Instruments

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GPIx
GPOx
4
3
2
1
EXT_INTx
2
1
TMS320DM6441
SPRS359E – SEPTEMBER 2006 – REVISED AUGUST 2010
www.ti.com
6.8.2
GPIO Peripheral Input/Output Electrical Data/Timing
Table 6-26. Timing Requirements for GPIO Inputs(1) (see Figure 6-19)
1.05 V and
1.2 V
NO.
UNIT
MIN
MAX
1
tw(GPIH)
Pulse duration, GPIx high
52
ns
2
tw(GPIL)
Pulse duration, GPIx low
52
ns
(1)
The pulse width given is sufficient to generate a CPU interrupt or an EDMA3 event. However, if a user wants to have DM6441 recognize
the GPIx changes through software polling of the GPIO register, the GPIx duration must be extended to allow DM6441 enough time to
access the GPIO register through the internal bus.
Table 6-27. Switching Characteristics Over Recommended Operating Conditions for GPIO Outputs
(see Figure 6-19)
1.05 V and 1.2 V
NO.
PARAMETER
UNIT
MIN
MAX
3
tw(GPOH)
Pulse duration, GPOx high
26(1)
ns
4
tw(GPOL)
Pulse duration, GPOx low
26(1)
ns
(1)
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.
Figure 6-19. GPIO Port Timing
6.8.3
GPIO Peripheral External Interrupts Electrical Data/Timing
Table 6-28. Timing Requirements for External Interrupts(1) (see Figure 6-20)
1.05 V and 1.2 V
NO.
UNIT
MIN
MAX
1
tw(ILOW)
Width of the external interrupt pulse low
52
ns
2
tw(IHIGH)
Width of the external interrupt pulse high
52
ns
(1)
The pulse width given is sufficient to generate an interrupt or an EDMA3 event. However, if a user wants to have DM6441recognize the
GPIO changes through software polling of the GPIO register, the GPIO duration must be extended to allow DM6441 enough time to
access the GPIO register through the internal bus.
Figure 6-20. GPIO External Interrupt Timing
124
Peripheral and Electrical Specifications
Copyright © 2006–2010, Texas Instruments Incorporated
Submit Documentation Feedback
Product Folder Link(s): TMS320DM6441



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