Difference between revisions of "ZNEQ32 Z32F0xx3 series"
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=== Solution === |
=== Solution === |
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| − | To acquire FLASH read access again execute in J-Flash "Unsecure Chip" |
+ | To acquire FLASH read access again execute in J-Flash "Unsecure Chip" |
| + | On each connect the J-LINK checks for a read protection and offers to "Unsecure Chip" |
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| − | #Target->Manual Programming->Unsecure Chip. |
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| + | Side effect unsecuring the chip triggers a mass erase. |
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| − | This triggers a complete chip erase and configures option page 1 to allow FLASH access again. |
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Latest revision as of 12:26, 5 July 2018
This article describes device specifics of the Zilog ZNEQ32 Z32F0xx3 series devices.
Disable Read/Write protection
The ZNEQ32 Z32F0xx3 series allows within it's configuration option area in page 1 to configure the read and erase/write protection of the internal FLASH. At address 0x1FFFF200 the read protection of the internal flash can be configured, and at address 0x1FFFF240 the erase/write protection of Flash can be configured.
Issue
In case the complete device is erased by "Chip erase" or in case especially option page 1 gets erased and doesn't get reprogrammed correctly before the next reset, read access to FLASH gets lost.
Solution
To acquire FLASH read access again execute in J-Flash "Unsecure Chip" On each connect the J-LINK checks for a read protection and offers to "Unsecure Chip" Side effect unsecuring the chip triggers a mass erase.
