DM368ZCEZ datasheet(89/208 Pages) TI1

89 / 208 page

GPIx

GPOx

EXT_INTx

TMS320DM368

www.ti.com

SPRS668C

– APRIL 2010 – REVISED JUNE 2011

Table 6-14. Switching Characteristics Over Recommended Operating Conditions for GPIO Outputs

(see Figure 6-11)

DEVICE

NO.

PARAMETER

UNIT

MIN

MAX

36P(1) -

tw(GPOH)

Pulse duration, GPOx high

36P(1) -

tw(GPOL)

Pulse duration, GPOx low

(1)

P = PLLC1.SYSCLK4 period, where SYSCLK4 is an output clock of PLLC1. For more details, see Section 3.3, Device Clocking.

Figure 6-11. GPIO Port Timing

6.8.3

GPIO Peripheral External Interrupts Electrical Data/Timing

Table 6-15. Timing Requirements for External Interrupts/EDMA Events(1) (see Figure 6-12)

DEVICE

NO.

UNIT

MIN

MAX

tw(ILOW)

Width of the external interrupt pulse low

2P(2)

tw(IHIGH)

Width of the external interrupt pulse high

2P(2)

(1)

The pulse width given is sufficient to generate an interrupt or an EDMA event. However, if a user wants the device to recognize the

GPIO changes through software polling of the GPIO register, the GPIO duration must be extended to allow the device enough time to

access the GPIO register through the internal bus.

(2)

P = PLLC1.SYSCLK4 period, where SYSCLK4 is an output clock of PLLC1. For more details, see Section 3.3, Device Clocking.

Figure 6-12. GPIO External Interrupt Timing

6.9

EDMA Controller

The EDMA controller handles all data transfers between memories and the device slave peripherals on

the device. These are summarized as follows:

•

Transfer to/from on-chip memories

– ARM program/data RAM

– HDVICP Coprocessor memory

– MPEG/JPEG Coprocessor memory

•

Transfer to/from external storage

– DDR2 / mDDR SDRAM

– Asynchronous EMIF

– OneNAND flash

– NAND flash, NOR flash

– Smart Media, SD, MMC, xD media storage

Peripheral Information and Electrical Specifications

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