Process for operating a controller with a programmable memory

• US 6,167,344 A
• Filed: 03/19/1998
• Issued: 12/26/2000
• Est. Priority Date: 04/23/1996
• Status: Expired due to Term

• Current Assignee: Robert Bosch GmbH
• Original Assignee: Robert Bosch GmbH
• Inventors: Franz, Carsten, Fackler, Rupert
• Primary Examiner(s): Hua, Ly V.
• Assistant Examiner(s): Crockett, Robert G.
• Application Number:
  US08/981,430
• Time in Patent Office: 1,013 Days
• Field of Search: 701/1, 701/29, 701/33, 701/35, 701/102, 701/115, 365/195, 713/1, 714/5, 714/23
• US Class Current: 701/115
• CPC Class Codes: G11C 16/102 External programming circuits, e.g. EPROM programmers; In-circuit programming or reprogramming; EPROM emulators
• CPC Class Codes: G11C 16/22 Safety or protection circuits preventing unauthorised or accidental access to memory cells

Abstract

A method is described for operating a control apparatus having a programmable memory unit wherein the programming of the memory unit takes place with a sequential execution of a multiplicity of memory programming control operations. The described method is characterized in that: a check step S1 is provided with the aid of which it can be determined whether all, selected individual or several of the memory programming control operations, which must be then have been carried out and a decision step S2 is provided, in which, while considering the check result, a decision is made as to whether the programming operation should be continued as prescribed by executing further memory programming control operations.

Claims

1. A method for operating a control apparatus having a programmable memory unit, the programming of the memory unit taking place with a sequential execution of a multiplicity of memory programming control operations, the method comprising:

executing a check step S1 via which it can be determined whether all, selected individual or several of the memory programming control operations have been carried out which must by then have been carried out;

executing a decision step S2, in which, while taking into account the check results, a decision is made as to whether the programming operation should be continued as prescribed by executing further memory programming control operations; and

,

the execution of the memory programming control operations takes place by processing control programs and that the check as to whether a memory programming control operation has been executed is effected via a check as to whether the assigned control program or the assigned control program segment was run through.

2. The method of claim 1, wherein the control programs, the execution of which can be checked by the check step S1, effect a change of the counter reading of a counter in addition to the execution of the actual control operation.

3. Method of claim 1, wherein the control programs, the execution of which can be checked by the check step S1, effect a setting or erasure of an assigned identifier in addition to carrying out the actual control operation.

4. The method of claim 1, wherein the programming of the memory unit is only effected or continued if or as long as it is detected that a predetermined voltage is applied to an input terminal of the control apparatus by an external programming apparatus or a corresponding control operation for monitoring the control apparatus is or has been carried out.

5. The method of claim 1, wherein the programming of the memory unit is only then effected or continued if or as long as it is detected that an initialization, which normally precedes a programming of the memory unit, has been made or a corresponding control operation for monitoring said control apparatus is or has been carried out.

6. The method of claim 1, wherein the programming of the memory unit is only effected or continued if or as long as it is detected that a communication between the control apparatus and an external programming apparatus is in process while maintaining a predetermined protocol or is started or a corresponding control operation for monitoring the control apparatus is executed or has been executed.

7. The method of claim 1, wherein the programming of the memory unit is only effected or continued if or as long as it is detected that a corresponding request of an external programming apparatus is present or a corresponding control operation for monitoring the external control apparatus is or has been carried out.

8. The method of claim 1, wherein addresses and data, which are to be applied to corresponding terminals of the memory unit in advance of programming for unlocking the memory unit, are read into a volatile memory of the control apparatus only after the start of a communication between the control apparatus and an external programming apparatus.