CSR user manual: add precise trap description (fix #1217) (#1646)

openhwgroup · Nov 21, 2023 · 30cf669 · 30cf669
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commit 30cf669
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diff --git a/docs/01_cva6_user/CV32A6_Control_Status_Registers.rst b/docs/01_cva6_user/CV32A6_Control_Status_Registers.rst
@@ -39,6 +39,9 @@ privileged specification.
 
 Reads or writes to a CSR that is not implemented will result in an illegal instruction exception.
 
+Any illegal instruction exception raised by CSR access is precise.
+For instance, reading and writing to a read-only CSR will not update the destination register.
+
 .. tip::
   This section was auto-generated by **Register Manager** from `Jade Design Automation <https://jade-da.com/>`_. |logo|