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HCS12 Datasheet(PDF) 249 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) 249 Page - Freescale Semiconductor, Inc

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Glossary
S12CPUV2 Reference Manual, Rev. 4.0
Freescale Semiconductor
249
Operation:
(SP) – $0002
⇒ SP
(A : B)
⇒ M(SP) :M(SP+1)
Description:
Stacks the content of double accumulator D. The stack pointer is
decremented by two, then the contents of accumulators A and B are stored
at the location to which the SP points.
After PSHD executes, the SP points to the stacked value of accumulator A.
This stacking order is the opposite of the order in which A and B are stacked
when an interrupt is recognized. The interrupt stacking order is
backward-compatible with the M6800, which had no 16-bit accumulator.
Push instructions are commonly used to save the contents of one or more
CPU registers at the start of a subroutine. Complementary pull instructions
can be used to restore the saved CPU registers just before returning from
the subroutine.
PSHD
Push Double Accumulator onto Stack
PSHD
CCR Details:
S
X
HIN
Z
V
C
––––––––
Source Form
Address
Mode
Object Code
Access Detail
HCS12
M68HC12
PSHD
INH
3B
OS
OS



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