Digital Spectrum TMS320C6413, Technical Reference

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Spectrum Digital, Inc
1-3
• JTAG emulation via external emulator
• Single voltage power supply (+5V)
1.2 Functional Overview of the TMS320C6413/C6418 EVM
The DSP interfaces to external SDRAM, SBRAM, Flash memory and an expansion
memory interface connector through its 32-bit External Memory Interface (EMIF). The
SDRAM accesses are in 32-bit mode in chip enable 0 memory space. The EMIF
provides the necessary refresh signals. The Flash accesses are in 8,16, or 32-bit
asynchronous mode in the bottom half of chip enable 1 space. The default mode of the
EVM for CE1 is 8 bit mode. The SBRAM is accessed via chip enable 3, if it is not routed
to the expansion connector which is controlled by the CPLD control register. The EMIF
signals are brought out to the daughter card expansion connectors which use chip
enables 2 and 3.
An on-board AIC23 codec allows the DSP to transmit and receive analog signals.
The I
2
C bus is used for the codec control interface and McBSP1 is used for data.
Analog I/O is done through four 3.5mm audio jacks that correspond to microphone
input, line input, line output and headphone output. The codec input is software
selectable between the microphone or the line input as the active input. The analog
output is driven to both the line out (fixed gain) and headphone (adjustable gain)
connectors. McBSP1 can be re-routed to the expansion connectors in software.
A programmable logic device called a CPLD is used to implement glue logic that ties
the board components together. The CPLD has a register based user interface that
lets the user configure the board by reading and writing to the CPLD registers. The
registers reside in the upper half of chip enable 1.
The EVM includes 4 LEDs and 4 position DIP switch as a simple way to provide the
user with interactive feedback. Both are accessed by reading and writing to the CPLD
registers.
A separate Keypad/LCD display card is interfaced via CPLD registers and I
2
C
accesses. This module provides a flexible input/output mechanism for application
programs
An included 5V external power supply is used to power the board. On-board voltage
regulators provide the +1.2V or +1.4V DSP core voltage, +3.3V digital and +3.3V
analog voltages. Voltage supervisors integrated into the regulators monitor voltage
regulation, and will hold the board in reset until the supplies are within operating
specifications and the reset button is released.