Texas-instruments TMS320DM644x User Manual download pdf (Page 15)

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2.8 EDMA Event Support

2.9 Power Management

2.10 Emulation Considerations

Peripheral Architecture

The GPIO peripheral can provide synchronization events to the EDMA. The EDMA events supported on

this device are listed in Table 3 .

Table 3. GPIO Synchronization Events to the EDMA

Interrupt Source EDMA Synchronization Event Number

GPIO0 32

GPIO1 33

GPIO2 34

GPIO3 35

GPIO4 36

GPIO5 37

GPIO6 38

GPIO7 39

GPIO Bank 0 40

GPIO Bank 1 41

GPIO Bank 2 42

GPIO Bank 3 43

GPIO Bank 4 44

The GPIO peripheral can be placed in reduced-power modes to conserve power during periods of low

activity. The power management of the GPIO peripheral is controlled by the processor Power and Sleep

Controller (PSC). The PSC acts as a master controller for power management for all of the peripherals on

the device. For detailed information on power management procedures using the PSC, see the

TMS320DM644x DMSoC ARM Subsystem Reference Guide (SPRUE14).

When the GPIO peripheral is placed in a low-power state by the PSC, the interrupt generation capability is

suspended until the GPIO peripheral is removed from the low-power state. While in the low-power state,

the GPIO signals configured as outputs are maintained at their state prior to the GPIO peripheral entering

the low-power state.

The GPIO peripheral is not affected by emulation suspend events (such as halts and breakpoints).

SPRUE25 – December 2005 General-Purpose Input/Output (GPIO) 15

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Texas-instruments TMS320DM644x User Manual Page 15