Data signal handling circuitry and methods with error analysis capabilities
First Claim
Patent Images
1. An electronic device comprising:
- a component configured to receive a data signal and process data from the signal through a series of circuit layers, beginning with a first circuit layer configured to initially receive the data signal, and ending with a second circuit layer configured to perform an application on data from the data signal, one of the series of circuit layers outputting from the component an error signal containing an error indication, the error signal being generated substantially concurrent with detection, by the one of the series of circuit layers, of a data error occurring in the data signal;
a lead configured to convey a noise signal containing noise indications substantially concurrent with noise produced by a noise source of the electronic device; and
processor circuitry configured to receive the error signal and the noise signal, and configured to compare timing of the error indication in the error signal and the noise indications in the noise signal, wherein the processor circuitry is configured to produce an output signal identifying the noise source as a possible cause of the error indication if the error indication has a predetermined timing relationship to the noise indication, and wherein the predetermined timing relationship requires the noise indication to be no more than a predetermined amount of time prior to the error indication.
1 Assignment
0 Petitions
Accused Products
Abstract
Data receiver circuitry in the device is provided with one or more error signal output leads. An error signal on such a lead includes an error indication as soon as possible after the associated low level circuitry detects a data error. The timing of such an error indication is compared to the timing of noise from various possible noise sources in the device. The noise source that produced significant noise closest in time prior to the error indication is identified as the noise source responsible for the data error that caused the error indication.
32 Citations
21 Claims
-
1. An electronic device comprising:
-
a component configured to receive a data signal and process data from the signal through a series of circuit layers, beginning with a first circuit layer configured to initially receive the data signal, and ending with a second circuit layer configured to perform an application on data from the data signal, one of the series of circuit layers outputting from the component an error signal containing an error indication, the error signal being generated substantially concurrent with detection, by the one of the series of circuit layers, of a data error occurring in the data signal; a lead configured to convey a noise signal containing noise indications substantially concurrent with noise produced by a noise source of the electronic device; and processor circuitry configured to receive the error signal and the noise signal, and configured to compare timing of the error indication in the error signal and the noise indications in the noise signal, wherein the processor circuitry is configured to produce an output signal identifying the noise source as a possible cause of the error indication if the error indication has a predetermined timing relationship to the noise indication, and wherein the predetermined timing relationship requires the noise indication to be no more than a predetermined amount of time prior to the error indication. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
-
-
18. A method of testing an electronic device including a component configured to receive a data signal and process data from that data signal through a series of circuit layers, beginning with a first circuit layer configured to initially receive the data signal, and ending with a second circuit layer configured to perform an application on the data from the data signal, the method comprising:
-
causing one of the series of circuit layers to output from the component an error signal containing an error indication, the error signal being generated substantially concurrent with detection, by the one of the series of circuit layers, of a data error occurring in the data signal; and comparing timing of the error indication in the error signal and a noise indication in a noise signal, the noise signal containing noise indications substantially concurrent with noise produced by a noise source of the electronic device, wherein comparing the timing of the error indication in the error signal and the noise indication in the noise signal comprises determining whether the noise indication is within a predetermined time interval prior to the error indication. - View Dependent Claims (19, 20, 21)
-
Specification