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Kinetis MK22FN512x and MK22FN256CAP12R MCUs 勘误手册

更新时间:2023-01-07 13:59:03 大小:147K 上传用户:sun2152查看TA发布的资源 标签:kinetis 下载积分:1分 评价赚积分 (如何评价?) 打赏 收藏 评论(0) 举报

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Description: ARM Errata 752770: Interrupted loads to SP can cause erroneous behavior This issue is more prevalent for user code written to manipulate the stack. Most compilers will not be affected by this, but please confirm this with your compiler vendor. MQX™ and FreeRTOS™ are not affected by this issue. Affects: Cortex-M4, Cortex-M4F Fault Type: Programmer Category B Fault Status: Present in: r0p0, r0p1 Open. If an interrupt occurs during the data-phase of a single word load to the stack-pointer (SP/ R13), erroneous behavior can occur. In all cases, returning from the interrupt will result in the load instruction being executed an additional time. For all instructions performing an update to the base register, the base register will be erroneously updated on each execution, resulting in the stack-pointer being loaded from an incorrect memory location. The affected instructions that can result in the load transaction being repeated are: 1) LDR SP,[Rn],#imm 2) LDR SP,[Rn,#imm]! 3) LDR SP,[Rn,#imm] 4) LDR SP,[Rn] 5) LDR SP,[Rn,Rm] The affected instructions that can result in the stack-pointer being loaded from an incorrect memory address are: 1) LDR SP,[Rn],#imm 2) LDR SP,[Rn,#imm]! Conditions: 1) An LDR is executed, with SP/R13 as the destination. 2) The address for the LDR is successfully issued to the memory system. 3) An interrupt is taken before the data has been returned and written to the stack-pointer.

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Kinetis_MK22FN512x_and_MK22FN256CAP12R_MCUs_勘误手册.pdf 147K

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