Importance

Loading Importance Indicators...

Abstract

A real time probe device is provided for a digital signal processor having a multiported data RAM, a time division multiplexed data RAM bus, and a processor. The probe includes a programmable comparator coupled to the address lines of the data RAM bus for determining that data is being written to a location of the multiported data RAM specified by the programmable comparator, a circuit for receiving the data on the data lines of the data RAM bus and for writing the data to a data buffer in the multiported data RAM, a reading circuit for obtaining the data from the data buffer of the multiported data RAM, and preferably a digital to analog converter for receiving at regular intervals the data obtained from the multiported data RAM and providing an analog signal therefrom. The average data rate at which data is written to the buffer in the data RAM should be the same as the rate at which data is obtained from the buffer of the data RAM for D/A conversion. Preferably, the buffer of the multiported data RAM into which the data is written and read by the probe is of variable length depending upon the RAM address to be probed. In this manner, delay is kept to a minimum.

Loading the Abstract Image...

First Claim