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參數(shù)資料
| 型號： | EPXA4 |
| 廠商： | Altera Corporation |
| 英文描述： | Excalibur Devices |
| 中文描述： | 神劍設備 |
| 文件頁數(shù)： | 28/34頁 |
| 文件大?。?/td> | 277K |
| 代理商： | EPXA4 |
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28
Altera Corporation
Errata Sheet - Appendix A
Notes:
In all privileged modes this errata exists if the base register is 8 or greater.
This is not restricted to FIQ mode.
Instructions of the form
LDM{<cond>}<addressing_mode> <Rn>,<registers_and_pc}^
operate correctly since these are not LDM to user mode register
instructions. These instructions perform a return from exception.
Example of failing instructions
LDMIA sp,{sp,lr}^
LDMIA r8,{r8-r10}^
Examples that do NOT fail
LDMIA sp,{r8,sp,lr}^
; Ok, since first register is not the base register
LDMIA r5,{r5,sp,lr}^
; Ok, since base register is < r8
LDMIA sp,{sp}^
; Ok, since only one register in the list
LDMIA sp,{sp,lr,pc}^
; Ok, since PC in the list and hence is a return from
; exception instruction and not a load of user mode
; registers.
Implications
This errata only applies to hand crafted assembler code, as the ARM
compiler does not generate such instructions. The use of this instruction is
typically limited to a few places in exception handlers, thus limiting the
scope of this erratum.
Work-around
This instruction is only used by hand crafted assembler code. The ARM
compiler will not generate this instruction. To work-around this errata the
LDM should be split into two separate instructions.
相關PDF資料 |
PDF描述 |
|---|---|
| EPZ3001G | Power Choke |
| EPZ3003G | Power Choke |
| EPZ3006G | Power Choke |
| EPZ3011G | Power Choke |
| EPZ3011G-LF | Power Choke |
相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| EPXA4F1020C1 | 制造商:Rochester Electronics LLC 功能描述: 制造商:Altera Corporation 功能描述:IC EXCALIBUR ARM 1020FBGA |
| EPXA4F1020C1ES | 制造商:Altera Corporation 功能描述:IC EXCALIBUR ARM 1020FBGA |
| EPXA4F1020C2 | 制造商:Rochester Electronics LLC 功能描述: 制造商:Altera Corporation 功能描述:IC EXCALIBUR ARM 1020FBGA |
| EPXA4F1020C2ES | 制造商:Altera Corporation 功能描述:IC EXCALIBUR ARM 1020FBGA |
| EPXA4F1020C3 | 制造商:Altera Corporation 功能描述:IC EXCALIBUR ARM 1020FBGA |
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