US5307285A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Circuit configuration for emulating a microcontroller
Assignee: Siemens AG
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Filing: 1992-09-23
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Granted: 1994-04-26
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Expires: 2012-09-23
Abstract
Abstract A circuit configuration for emulating a microcontroller includes connection terminals being pin-compatible with the microcontroller to be emulated. A bond-out chip of the microcontroller is connected to the connection terminals. A reprogrammable memory device is provided. A logic configuration provides direct access from at least some of the connection terminals to the reprogrammable memory device. The circuit configuration has a three-dimensional measurement being at least approximately identical to the three-dimensional measurement of the microcontroller to be emulated.
Inventors
- 👤 Steffen Storandt
- 👤 Ralf-Johannes Lenninger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 13:56
CPC Classifications
G; G06; G06F; G06F15/00; G06F15/76; G06F15/78; G06F15/7828; G06F15/7832
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
137 words
Reprogrammable microcontroller, comprising connection terminals, a bond-out chip connected to said connection terminals, a reprogrammable memory device being programmable through said connection terminals, and a logic configuration connected to at least some of said connection terminals and providing direct access from at least some of said connection terminals to said reprogrammable memory device, said logic configuration including means for effecting direct access from said connection terminals to said reprogrammable memory device and for shifting said bond-out chip into a passive state in response to a given logic signal applied to at least one of said connection terminals, and said logic configuration including means for causing the reprogrammable microcontroller to be inaccessible for programming through said terminals and to emulate a ROM-type microcontroller when said given logic signal is not applied to said at least one connection terminal.
Claim 2
Dependent Claim
137 words
Reprogrammable microcontroller, comprising connection terminals, a bond-out chip connected to said connection terminals, a reprogrammable memory device being programmable through said connection terminals, and a logic configuration connected to at least some of said connection terminals and providing direct access from at least some of said connection terminals to said reprogrammable memory device, said logic configuration including means for effecting direct access from said connection terminals to said reprogrammable memory device and for shifting said bond-out chip into a passive state in response to a given logic signal applied to at least one of said connection terminals, and said logic configuration including means for causing the reprogrammable microcontroller to be inaccessible for programming through said terminals and to emulate a ROM-type microcontroller when said given logic signal is not applied to said at least one connection terminal.
Claim 3
Dependent Claim
21 words
Circuit configuration according to claim 1, including an adaptor device providing direct access to said memory device through said connection terminals.
Claim 4
Dependent Claim
25 words
Circuit configuration according to claim 2, wherein said logic configuration is activatable for direct access to said memory device by means of said adaptor device.
Claim 5
Dependent Claim
15 words
Circuit configuration according to claim 1, wherein said memory device is directly accessible for programming.
Claim 6
Dependent Claim
21 words
Circuit configuration according to claim 1, wherein said memory device is directly accessible for reading data stored in said memory device.
Claim 7
Dependent Claim
33 words
Circuit configuration according to claim 1, wherein at least one of said bond-out chip and said reprogrammable memory device are mounted along with said logic configuration without a housing on a mother board.
Claim 8
Dependent Claim
15 words
Circuit configuration according to claim 1, wherein said logic configuration is a custom circuit configuration.
Claim 9
Dependent Claim
15 words
Circuit configuration according to claim 1, wherein said logic configuration is a semi-custom circuit configuration.
Claim 10
Dependent Claim
17 words
Circuit configuration according to claim 1, wherein said reprogrammable memory device is at least one EPROM chip.
Claim 11
Dependent Claim
17 words
Circuit configuration according to claim 1, wherein said reprogrammable memory device is at least one EEPROM chip.
Claim 12
Dependent Claim
24 words
Circuit configuration according to claim 1, wherein said connection terminals of said circuit configuration are disposed in the manner of a PLCC connection configuration.
Claim 13
Dependent Claim
24 words
Circuit configuration according to claim 1, wherein said connection terminals of said circuit configuration are disposed in the manner of a DIP connection configuration.
Claim 14
Dependent Claim
16 words
Circuit configuration according to claim 1, wherein said logic configuration is integrated on said bond-out chip.
References Cited (Backward Citations)
US5062034A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1997-04-25 | 1997-10-25 | 1998-04-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-04-25 | 2001-10-25 | 2002-04-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-04-25 | 2005-10-25 | 2006-04-26 | $7700.00 | Window Closed / Lapsed |