DSP Subsystem Reference Guide

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2.4 Internal Peripherals

2.4.1 Interrupt Controller (INTC)

2.4.2 Power-Down Controller (PDC)

Internal Peripherals

This C64x+ Megamodule includes the following internal peripherals:

• Interrupt controller (INTC)

• Power-down controller (PDC)

This section briefly describes the INTC and PDC. For more information on these peripherals, see the

TMS320C64x+ DSP Megamodule Reference Guide (SPRU871 ).

The C64x+ Megamodule includes an interrupt controller (INTC) to manage CPU interrupts. The INTC

maps the 0 to 127 DSP device events to 12 CPU interrupts. Refer to device-specific data manual for a list

of all the DSP device events. The interrupt controller section of the TMS320C64x+ DSP Megamodule

Reference Guide (SPRU871 ) fully describes the INTC and how it maps the DSP device events to the

12 CPU interrupts.

The C64x+ Megamodule includes a power-down controller (PDC). The PDC can power-down all of the

following components of the C64x+ Megamodule:

• C64x+ CPU

• L1P controller

• L1D controller

• L2 controller

• Extended memory controller (EMC)

• Internal direct memory access (IDMA) controller

The DM643x DMP does not support power-down of the internal memories of the DSP subsystem.

The C64x+ Megamodule is capable of providing both dynamic and static power-down; however, only static

power-down is supported on the DM643x DMP. The TMS320C64x+ DSP Megamodule Reference Guide

(SPRU871 ) describes the power-down control in more detail.

• Static power-down: The PDC initiates power down of the entire C64x+ Megamodule and all internal

memories immediately upon command from software.

On the DM643x DMP, static power-down affects all components of the C64x+ Megamodule. The DM643x

DMP does not support power-down of the internal memories. Software can initiate static power-down via a

Megamodule Reference Guide (SPRU871 ).

Note: The DM643x DMP does not support dynamic power-down.

TMS320C64x+ Megamodule22 SPRU978E – March 2008

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