C54x Peripherals

HOST PORT INTERFACE (‘C542)

2 STANDARD SERIAL PORTS (‘C541)

PLL CLOCK GENERATOR

S/W WAITSTATE GENERATOR

TIMER

TDM SERIAL PORT (‘C542)

AUTO BUFFERED SERIAL PORT (‘C542)

TO BUSES

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The peripheral set of the C54x is quite diverse compared to many other DSPs. Onboard there's an auto-buffering serial port available on selected C54x family devices. This is essentially a serial port that links the port directly to a 2K block of memory, allowing the serial port to load memory directly without intervention from the processor which would slow the processor cycle time.

The C54x also features time division multiplexing serial ports which allow multiple C54x devices to be connected for inter-processor communication over a TDM-type of a bus structure.

Also onboard we find a timer, software wait-state generators, and phase locked loop generators. The PLL generators are offered in various styles on the C54x family. Some are fixed and have a variety of different multipliers, while others, for instance those on the C548 and the C549 devices, are actually software programmable PLLs which allow the user to throttle the device up and down at will.

In addition, there are standard serial ports and a host port interface, which allows glueless communication to a host microprocessor. This enables the microprocessor to hand off commands to the DSP without interrupting the DSP.