Patent US5696454A successfully refreshed from Google Patents.
US5696454A
Expired / Lapsed
US
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Hierarchical programming of electrically configurable integrated circuits
Assignee: Xilinx Inc
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Filing: 1997-01-23
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Granted: 1997-12-09
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Expires: 2017-01-23
Abstract
Abstract A data-cascading hierarchically arranged electrically configurable logic device (ECD) system and an enable-cascading hierarchically arranged ECD system are provided. In both cases, the configuration bitstream includes a local count and at least one remainder count for each ECD. The local count determines the amount of configuration data to be stored locally. By setting this count to zero, an ECD can be bypassed. The remainder count determines the amount of data to be stored by devices down one hierarchical branch from the local ECD. By setting this count to zero, this branch can be bypassed and ECDs of a second branch can be configured sooner. In the data cascading system, the counts determine how data is routed through the ECDs. In the enable cascading system, the data is broadcast to all ECDs. The counts determine when and if the configuration enable inputs of downstream ECDs are to be activated.
Inventors
- 👤 Stephen M. Trimberger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 14:52
CPC Classifications
G; G06; G06F; G06F30/00; G06F30/30; G06F30/34; H; H03; H03K; H03K19/00; H03K19/02; H03K19/173; H03K19/177; H03K19/17704; H03K19/17748; H03K19/17758
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
114 words
An electrically configurable system comprising: a source of configuration data including at least a first set of configuration values and at least a first multi-bit code indicating portions of an electrically configurable integrated circuit to receive configuration data; means for determining the amount of data in said first set of configuration values; a first electrically configurable integrated circuit, said first electrically configurable integrated circuit being coupled to said data source so that at least a portion of said first set of configuration values is stored within said first electrically configurable integrated circuit; and means for interpreting said multi-bit code and directing said configuration data to an indicated location within said electrically configurable integrated circuit.
Claim 2
Dependent Claim
114 words
An electrically configurable system comprising: a source of configuration data including at least a first set of configuration values and at least a first multi-bit code indicating portions of an electrically configurable integrated circuit to receive configuration data; means for determining the amount of data in said first set of configuration values; a first electrically configurable integrated circuit, said first electrically configurable integrated circuit being coupled to said data source so that at least a portion of said first set of configuration values is stored within said first electrically configurable integrated circuit; and means for interpreting said multi-bit code and directing said configuration data to an indicated location within said electrically configurable integrated circuit.
Claim 3
Dependent Claim
95 words
The electrically configurable system of claim 1 further comprising a second electrically configurable integrated circuit, wherein: said configuration data source further comprises a second set of configuration values and a second multi-bit code indicating portions of an electrically configurable integrated circuit to receive configuration data; said first electrically configurable integrated circuit has an output; and said second electrically configurable integrated circuit is coupled to said output of said first electrically configurable integrated circuit so that at least a portion of said second set of configuration values is stored in said second electrically configurable integrated circuit.
Claim 4
Dependent Claim
80 words
The electrically configurable system of claim 1 further comprising a second electrically configurable integrated circuit, wherein: said configuration data source further comprises a second set of configuration values and a second multi-bit code indicating portions of an electrically configurable integrated circuit to receive configuration data; and said second electrically configurable integrated circuit is coupled to said data source so that at least a portion of said second set of configuration values is stored in said second electrically configurable integrated circuit.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2000-12-08 | 2001-06-09 | 2001-12-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2004-12-08 | 2005-06-09 | 2005-12-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2008-12-08 | 2009-06-09 | 2009-12-09 | $7700.00 | Window Closed / Lapsed |