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Application Brief
SPRA465
Digital Signal Processing Solutions June 1999
Designing the TMS320C548/9 DSP
Development Board
Art Chen Digital Signal Processing Solutions
John Wong
Abstract
This application brief describes the design of the Texas Instruments (TI™)TMS320C548/9
development board (DVB) from both the hardware and software approach. The DVB is a simple
stand-alone application board used to evaluate the performance and characteristics of the
TMS320LC548-80, TMS320LC549-80, and TMS320VC549-80 digital signal processor (DSP)
hardware and software.
The TMS320C548/9 DVB contains two boards connected by two box-style connectors:
r
TMS320C548/9 DSP board
r
Analog interface circuit (AIC) board
The DVB contains the TMS320LC548 or TMS320VC549 DSP and provides full-speed verification
of TMS320C54x codes. The DVB transmits and receives the audio signals via the AIC and
operational amplifier (OP Amp, OPA) port. The DVB transmits and receives the PSTN signals via
the AIC and data access arrangement (DAA) port. The DVB connects with the XDS-510 (JTAG—
Joint Testing Action Group, IEEE1149.1 Standard) and uses the TMS320C54x ('C54x) emulation
software as a debugging tool.
This application brief discusses the technologies behind the power system, clock, AIC/OPA,
AIC/DAA, and DSP. We focus on the memory configuration and code development for direct
communication between on-chip synchronized serial port and serial devices AIC, aspecially on
the telephony.
The authors extend their deep appreciation to Kevin Chang, Max Chyou, and Ted Lee from the
ASP-WCBU application team; Ryan Hsiao from MSLP; Mandy Tsai from the Taiwan FAE team;
and the members of the DSP champion team for their invaluable help in this project.
