ECU identification retention across reprogramming events
View Patent ↗A memory system for a vehicle includes a first memory that is non-volatile, that is rewritable, and that stores a control program and identification data. A second memory is non-volatile. A control module transfers the identification data to the second memory, erases the first memory, rewrites the control program to the first memory, and transfers the identification data from the second memory to the first memory after erasing the first memory. The identification data may include data such as a software version identifier, a programming date, and/or a part number.
1. A memory system comprising:
a first memory that is non-volatile, that is rewritable, and that stores a control program and identification data;
a second memory that is non-volatile; and
a control module that transfers the identification data to the second memory, that erases the first memory, that rewrites the control program to the first memory, and that transfers the identification data from the second memory to the first memory after erasing the first memory.
2. The memory system of claim 1 wherein the second memory is not rewritable.
3. The memory system of claim 1 further comprising a memory module that includes the first memory and the second memory.
4. The memory system of claim 3 wherein the memory module is a flash memory module.
5. The memory system of claim 1 further comprising a third memory, wherein the control module transfers the identification data from the first memory to the third memory, and then transfers the identification data from the third memory to the second memory.
6. The memory system of claim 5 wherein the third memory is volatile.
7. The memory system of claim 6 wherein the third memory is RAM.
8. The memory system of claim 1 wherein the first memory stores a boot program.
9. The memory system of claim 8 wherein the control module has a first mode and a second mode.
10. The memory system of claim 9 wherein the control module transitions from the first mode to the second mode after transferring the identification data to the second memory, and transitions from the second mode to the first mode after rewriting the control.
11. The memory system of claim 10 wherein the control module executes the control program in the first mode and executes the boot program in the second mode.
12. The memory system of claim 1 wherein the identification data includes at least one of a software version identifier, a programming date, and/or a part number.
13. A control module that comprises the memory system of claim 1 .
14. A memory system comprising:
a first memory that is non-volatile, that is rewritable, that stores a control program and a boot program, and that stores identification data;
a second memory that is non-volatile and that is not rewritable; and
a control module that has a first mode and a second mode, that executes the control program in the first mode and executes the boot program in the second mode, that transfers the identification data from the first memory to the second memory, that transitions from the first mode to the second mode, that erases the first memory and rewrites the control program, that transitions from the second mode to the first mode, and that transfers the identification data from the second memory to the first memory.
15. A memory system comprising:
a first memory that is non-volatile, that is rewritable, that stores a control program and a boot program, and that stores identification data;
a second memory that is non-volatile and that is not rewritable;
a third memory that is volatile; and
a control module that has a first mode and a second mode, that executes the control program in the first mode and executes the boot program in the second mode, that transfers the identification data from the first memory to the third memory, that transitions from the first mode to the second mode, that transfers the identification data from the third memory to the second memory, that rewrites the control program, that transitions from the second mode to the first mode, and that transfers the identification data from the second memory to the first memory.