Texas Instruments TMS320C67X/C67X+ DSP manual SPRU733

TMS320C67x DSP Architecture

-DMA Controller (C6701 DSP only) transfers data between address ranges in the memory map without intervention by the CPU. The DMA controller has four programmable channels and a fifth auxiliary channel.

-EDMA Controller performs the same functions as the DMA controller. The EDMA has 16 programmable channels, as well as a RAM space to hold multiple configurations for future transfers.

-HPI is a parallel port through which a host processor can directly access the CPU’s memory space. The host device has ease of access because it is the master of the interface. The host and the CPU can exchange infor- mation via internal or external memory. In addition, the host has direct access to memory-mapped peripherals.

-Expansion bus is a replacement for the HPI, as well as an expansion of the EMIF. The expansion provides two distinct areas of functionality (host port and I/O port) which can co-exist in a system. The host port of the expansion bus can operate in either asynchronous slave mode, similar to the HPI, or in synchronous master/slave mode. This allows the device to interface to a variety of host bus protocols. Synchronous FIFOs and asynchronous peripheral I/O devices may interface to the expansion bus.

-McBSP (multichannel buffered serial port) is based on the standard serial port interface found on the TMS320C2000™ and TMS320C5000™ devices. In addition, the port can buffer serial samples in memory auto- matically with the aid of the DMA/EDNA controller. It also has multichannel capability compatible with the T1, E1, SCSA, and MVIP networking standards.

-Timers in the C6000 devices are two 32-bit general-purpose timers used for these functions:

J Time events J Count events J Generate pulses J Interrupt the CPU

J Send synchronization events to the DMA/EDMA controller.

-Power-down logic allows reduced clocking to reduce power consumption. Most of the operating power of CMOS logic dissipates during circuit switching from one logic state to another. By preventing some or all of the chip’s logic from switching, you can realize significant power savings with- out losing any data or operational context.

For an overview of the peripherals available on the C6000 DSP, refer to the TM320C6000 DSP Peripherals Overview Reference Guide (SPRU190).

SPRU733 Introduction 1-9