參數(shù)資料
型號: P610ARM-FPNR
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): 35/173頁
文件大小: 897K
代理商: P610ARM-FPNR
Instruction Set - B, BL
ARM610 Data Sheet
4-7
O
4.3
Branch and Branch with Link (B, BL)
The instruction is only executed if the condition is true. The various conditions are
defined
·
Table 4-2: Condition code summary
is shown in
·
Figure 4-2: Branch instructions
on page 4-6. The instruction encoding
, below.
Figure 4-2: Branch instructions
Branch instructions contain a signed two's complement 24-bit offset. This is shifted left
two bits, sign extended to 32 bits, and added to the PC. The instruction can therefore
specify a branch of +/- 32Mbytes. The branch offset must take account of the prefetch
operation, which causes the PC to be 2 words (8 bytes) ahead of the current
instruction.
Branches beyond +/- 32Mbytes must use an offset or absolute destination which has
been previously loaded into a register. In this case the PC should be manually saved
in R14 if a Branch with Link type operation is required.
4.3.1 The link bit
Branch with Link (BL) writes the old PC into the link register (R14) of the current bank.
The PC value written into R14 is adjusted to allow for the prefetch, and contains the
address of the instruction following the branch and link instruction. Note that the CPSR
is not saved with the PC and R14[1:0] are always cleared.
To return from a routine called by Branch with Link use MOV PC,R14 if the link register
is still valid or LDM Rn!,{..PC} if the link register has been saved onto a stack pointed
to by Rn.
31
28 27
25
24
23
0
Cond
101
L
offset
Link bit
0 = Branch
1 = Branch with Link
Condition field
相關(guān)PDF資料
PDF描述
P610ARM-B General purpose 32-bit microprocessor
P610ARM-KG General purpose 32-bit microprocessor
P610ARM-KW General purpose 32-bit microprocessor
P6121-AU120 Incremental Encoders
P6111-AP120 Incremental Encoders
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
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
P6-10R 制造商:Panduit Corp 功能描述:PANDUIT
P6-10R-E 功能描述:端子 NON-INSL.RING #6 #10 RoHS:否 制造商:AVX 產(chǎn)品:Junction Box - Wire to Wire 系列:9826 線規(guī):26-18 接線柱/接頭大小: 絕緣: 顏色:Red 型式:Female 觸點(diǎn)電鍍:Tin over Nickel 觸點(diǎn)材料:Beryllium Copper, Phosphor Bronze 端接類型:Crimp
P610R-E 制造商:Panduit Corp 功能描述: