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HCS12 bảng dữ liệu(PDF) 142 Page - Freescale Semiconductor, Inc

tên linh kiện HCS12
Giải thích chi tiết về linh kiện  HCS12 Microcontrollers
PDF  452 Pages
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nhà sản xuất  FREESCALE [Freescale Semiconductor, Inc]
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HCS12 bảng dữ liệu(HTML) 142 Page - Freescale Semiconductor, Inc

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S12CPUV2 Reference Manual, Rev. 4.0
142
Freescale Semiconductor
Operation:
If V = 0, then (PC) + $0002 + Rel
⇒ PC
Simple branch
Description:
Tests the V status bit and branches if V = 0.
BVC causes a branch when a previous operation on two’s complement
binary values does not cause an overflow. That is, when BVC follows a two’s
complement operation, a branch occurs when the result of the operation is
valid.
See 3.8 Relative Addressing Mode for details of branch execution.
BVC
Branch if Overflow Cleared
BVC
CCR Details:
S
X
HIN
Z
V
C
––––––––
Source Form
Address
Mode
Object Code
Access Detail
HCS12
M68HC12
BVC rel8
REL
28 rr
PPP/P(1)
PPP/P(1)
1. PPP/P indicates this instruction takes three cycles to refill the instruction queue if the branch is taken and one program
fetch cycle if the branch is not taken.
Branch
Complementary Branch
Test
Mnemonic
Opcode
Boolean
Test
Mnemonic
Opcode
Comment
r>m
BGT
2E
Z
+ (N ⊕ V) = 0
r
≤m
BLE
2F
Signed
r
≥m
BGE
2C
N
⊕ V = 0
r<m
BLT
2D
Signed
r=m
BEQ
27
Z = 1
r
≠m
BNE
26
Signed
r
≤m
BLE
2F
Z
+ (N ⊕ V) = 1
r>m
BGT
2E
Signed
r<m
BLT
2D
N
⊕ V = 1
r
≥m
BGE
2C
Signed
r>m
BHI
22
C
+ Z = 0
r
≤m
BLS
23
Unsigned
r
≥m
BHS/BCC
24
C = 0
r<m
BLO/BCS
25
Unsigned
r=m
BEQ
27
Z = 1
r
≠m
BNE
26
Unsigned
r
≤m
BLS
23
C
+ Z = 1
r>m
BHI
22
Unsigned
r<m
BLO/BCS
25
C = 1
r
≥m
BHS/BCC
24
Unsigned
Carry
BCS
25
C = 1
No Carry
BCC
24
Simple
Negative
BMI
2B
N = 1
Plus
BPL
2A
Simple
Overflow
BVS
29
V = 1
No Overflow
BVC
28
Simple
r=0
BEQ
27
Z = 1
r
≠0
BNE
26
Simple
Always
BRA
20
—
Never
BRN
21
Unconditional



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