ST32H743的内部RAM是否均有ECC？

只看该作者 · 2021-2-10 16:58

看技术手册关于RAM的ECC讲的也比较少，但似乎也没提只是部分RAM有ECC。但是AN5342里明确指出来了，STM32H7x3是只有紧耦合RAM和CACHE才有ECC的，谁能确认一下到底是什么情况？

只看该作者 · 2021-2-25 07:33

都不了解吗？@香水城老哥在吗？

1万 · 2021-2-25 23:28

it's described in H7 reference manual as below:

Error code correction (ECC)
Over the product lifetime, and/or due to external events such as radiations, invalid bits in
memories may occur. They can be detected and corrected by ECC. This is an expected
behavior that has to be managed at final-application software level in order to ensure data
integrity through ECC algorithms implementation.
SRAM data are protected by ECC:
• 7 ECC bits are added per 32-bit word.
• 8 ECC bits are added per 64-bit word for AXI-SRAM and ITCM-RAM.
The ECC mechanism is based on the SECDED algorithm. It supports single-error correction
and double-error detection.