參數(shù)資料
型號(hào)： P610ARM-B
廠商： Zarlink Semiconductor Inc.
英文描述： General purpose 32-bit microprocessor
中文描述： 通用32位微處理器
文件頁數(shù)： 67/173頁
文件大?。?/td> 897K
代理商： P610ARM-B
Instruction Set - LDM, STM
ARM610 Data Sheet
4-39
O
Figure 4-20: Pre-decrement addressing
4.9.4 Use of the S bit
When the S bit is set in a LDM/STM instruction its meaning depends on whether or not
R15 is in the transfer list and on the type of instruction. The S bit should only be set if
the instruction is to execute in a privileged mode.
LDM with R15 in transfer list and S bit set (Mode changes)
If the instruction is a LDM then SPSR_<mode> is transferred to CPSR at the same
time as R15 is loaded.
STM with R15 in transfer list and S bit set (User bank transfer)
The registers transferred are taken from the User bank rather than the bank
corresponding to the current mode. This is useful for saving the user state on process
switches. Base write-back should not be used when this mechanism is employed.
R15 not in list and S bit set (User bank transfer)
For both LDM and STM instructions, the User bank registers are transferred rather
than the register bank corresponding to the current mode. This is useful for saving the
user state on process switches. Base write-back should not be used when this
mechanism is employed.
When the instruction is LDM, care must be taken not to read from a banked register
during the following cycle (inserting a dummy instruction such as MOV R0, R0 after
the LDM will ensure safety).
0x100C
0x1000
0x0FF4
Rn
1
0x100C
0x1000
0x0FF4
2
R1
0x100C
0x1000
0x0FF4
3
0x100C
0x1000
0x0FF4
4
R1
R7
R5
R1
R5
Rn
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
P610ARM-B/KG/FPNR 制造商:未知廠家 制造商全稱:未知廠家 功能描述:MICROPROCESSOR|32-BIT|CMOS|QFP|144PIN|PLASTIC
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P610ARM-FPNR 制造商:ZARLINK 制造商全稱:Zarlink Semiconductor Inc 功能描述:General purpose 32-bit microprocessor
P610ARM-KG 制造商:ZARLINK 制造商全稱:Zarlink Semiconductor Inc 功能描述:General purpose 32-bit microprocessor
P610ARM-KW 制造商:ZARLINK 制造商全稱:Zarlink Semiconductor Inc 功能描述:General purpose 32-bit microprocessor
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