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HCS12 Datasheet(PDF) 265 Page - Freescale Semiconductor, Inc

Part # HCS12
Description  HCS12 Microcontrollers
PDF  452 Pages
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Manufacturer  FREESCALE [Freescale Semiconductor, Inc]
Direct Link  http://www.freescale.com
Logo FREESCALE - Freescale Semiconductor, Inc

HCS12 Datasheet(HTML) 265 Page - Freescale Semiconductor, Inc

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Glossary
S12CPUV2 Reference Manual, Rev. 4.0
Freescale Semiconductor
265
Operation:
Description:
Shifts all bits of accumulator B one place to the left. Bit 0 is loaded from the
C status bit. The C bit is loaded from the most significant bit of B. Rotate
operations include the carry bit to allow extension of shift and rotate
operations to multiple bytes. For example, to shift a 24-bit value one bit to
the left, the sequence ASL LOW, ROL MID, and ROL HIGH could be used
where LOW, MID, and HIGH refer to the low-order, middle and high-order
bytes of the 24-bit value, respectively.
ROLB
Rotate Left B
ROLB
C
b7 – – – – – – b0
C
CCR Details:
S
X
HIN
Z
V
C
––––
∆∆∆∆
N: Set if MSB of result is set; cleared otherwise
Z: Set if result is $00; cleared otherwise
V: N
⊕ C = [N • C] + [N • C] (for N and C after the shift)
Set if (N is set and C is cleared) or (N is cleared and C is set);
cleared otherwise (for values of N and C after the shift)
C: B7
Set if the MSB of B was set before the shift; cleared otherwise
Source Form
Address
Mode
Object Code
Access Detail
HCS12
M68HC12
ROLB
INH
55
O
O



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