Description
19
July 2002 Revised March 2004
SPRS200E
1.3
Description
The TMS320C64x
DSPs (including the TMS320DM642 device) are the highest-performance fixed-point
DSP generation in the TMS320C6000
DSP platform. The TMS320DM642 (DM642) device is based on the
second-generation high-performance, advanced VelociTI
very-long-instruction-word (VLIW) architecture
(VelociTI.2
) developed by Texas Instruments (TI), making these DSPs an excellent choice for digital media
applications. The C64x
is a code-compatible member of the C6000 DSP platform.
With performance of up to 4800 million instructions per second (MIPS) at a clock rate of 600 MHz, the DM642
device offers cost-effective solutions to high-performance DSP programming challenges. The DM642 DSP
possesses the operational flexibility of high-speed controllers and the numerical capability of array
processors. The C64x
DSP core processor has 64 general-purpose registers of 32-bit word length and eight
highly independent functional units—two multipliers for a 32-bit result and six arithmetic logic units (ALUs)—
with VelociTI.2
extensions. The VelociTI.2 extensions in the eight functional units include new instructions
to accelerate the performance in video and imaging applications and extend the parallelism of the VelociTI
architecture. The DM642 can produce four 32-bit multiply-accumulates (MACs) per cycle for a total of
2400 million MACs per second (MMACS), or eight 8-bit MACs per cycle for a total of 4800 MMACS. The
DM642 DSP also has application-specific hardware logic, on-chip memory, and additional on-chip peripherals
similar to the other C6000
DSP platform devices.
The DM642 uses a two-level cache-based architecture and has a powerful and diverse set of peripherals. The
Level 1 program cache (L1P) is a 128-Kbit direct mapped cache and the Level 1 data cache (L1D) is a 128-Kbit
2-way set-associative cache. The Level 2 memory/cache (L2) consists of an 2-Mbit memory space that is
shared between program and data space. L2 memory can be configured as mapped memory, cache, or
combinations of the two. The peripheral set includes: three configurable video ports; a 10/100 Mb/s Ethernet
MAC (EMAC); a management data input/output (MDIO) module; a VCXO interpolated control port (VIC); one
multichannel buffered audio serial port (McASP0); an inter-integrated circuit (I2C) Bus module; two
multichannel buffered serial ports (McBSPs); three 32-bit general-purpose timers; a user-configurable 16-bit
or 32-bit host-port interface (HPI16/HPI32); a peripheral component interconnect (PCI); a 16-pin
general-purpose input/output port (GP0) with programmable interrupt/event generation modes; and a 64-bit
glueless external memory interface (EMIFA), which is capable of interfacing to synchronous and
asynchronous memories and peripherals.
The DM642 device has three configurable video port peripherals (VP0, VP1, and VP2). These video port
peripherals provide a glueless interface to common video decoder and encoder devices. The DM642 video
port peripherals support multiple resolutions and video standards (e.g., CCIR601, ITUBT.656, BT.1120,
SMPTE 125M, 260M, 274M, and 296M).
These three video port peripherals are configurable and can support either video capture and/or video display
modes. Each video port consists of two channels — A and B with a 5120-byte capture/display buffer that is
splittable between the two channels.
For more details on the Video Port peripherals, see the TMS320C64x DSP Video Port/VCXO Interpolated
Control (VIC) Port Reference Guide (literature number SPRU629).
The McASP0 port supports one transmit and one receive clock zone, with eight serial data pins which can be
individually allocated to any of the two zones. The serial port supports time-division multiplexing on each pin
from 2 to 32 time slots. The DM642 has sufficient bandwidth to support all 8 serial data pins transmitting a
192-kHz stereo signal. Serial data in each zone may be transmitted and received on multiple serial data pins
simultaneously and formatted in a multitude of variations on the Philips Inter-IC Sound (I2S) format.
In addition, the McASP0 transmitter may be programmed to output multiple S/PDIF, IEC60958, AES-3,
CP-430 encoded data channels simultaneously, with a single RAM containing the full implementation of user
data and channel status fields.
McASP0 also provides extensive error-checking and recovery features, such as the bad clock detection circuit
for each high-frequency master clock which verifies that the master clock is within a programmed frequency
range.
ADV
ANCE
INFORMA
TION
TMS320C6000, and C6000 are trademarks of Texas Instruments.