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HCS12 Datasheet(PDF) 82 Page - Freescale Semiconductor, Inc

No. de pieza HCS12
Descripción Electrónicos  HCS12 Microcontrollers
PDF  452 Pages
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Fabricante Electrónico  FREESCALE [Freescale Semiconductor, Inc]
Página de inicio  http://www.freescale.com
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HCS12 Datasheet(HTML) 82 Page - Freescale Semiconductor, Inc

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S12CPUV2 Reference Manual, Rev. 4.0
82
Freescale Semiconductor
5.24 Stacking Instructions
The two types of stacking instructions, are shown in Table 5-24. Stack
pointer instructions use specialized forms of mathematical and data transfer
instructions to perform stack pointer manipulation. Stack operation
instructions save information on and retrieve information from the system
stack.
Table 5-24. Stacking Instructions
Mnemonic
Function
Operation
Stack Pointer Instructions
CPS
Compare SP to memory
(SP) – (M
: M + 1)
DES
Decrement SP
(SP) – 1
⇒ SP
INS
Increment SP
(SP)
+ 1 ⇒ SP
LDS
Load SP
(M
: M + 1) ⇒ SP
LEAS
Load effective address
into SP
Effective address
⇒ SP
STS
Store SP
(SP)
⇒ M : M + 1
TSX
Transfer SP to X
(SP)
⇒ X
TSY
Transfer SP to Y
(SP)
⇒ Y
TXS
Transfer X to SP
(X)
⇒ SP
TYS
Transfer Y to SP
(Y)
⇒ SP
Stack Operation Instructions
PSHA
Push A
(SP) – 1
⇒ SP; (A) ⇒ M(SP)
PSHB
Push B
(SP) – 1
⇒ SP; (B) ⇒ M(SP)
PSHC
Push CCR
(SP) – 1
⇒ SP; (A) ⇒ M(SP)
PSHD
Push D
(SP) – 2
⇒ SP; (A : B) ⇒ M(SP) : M(SP+1)
PSHX
Push X
(SP) – 2
⇒ SP; (X) ⇒ M(SP) : M(SP+1)
PSHY
Push Y
(SP) – 2
⇒ SP; (Y) ⇒ M(SP) : M(SP+1)
PULA
Pull A
(M(SP)) ⇒ A; (SP) + 1 ⇒ SP
PULB
Pull B
(M(SP)) ⇒ B; (SP) + 1 ⇒ SP
PULC
Pull CCR
(M(SP)) ⇒ CCR; (SP) + 1 ⇒ SP
PULD
Pull D
(M(SP) : M(SP+1)) ⇒ A : B; (SP) + 2 ⇒ SP
PULX
Pull X
(M(SP) : M(SP+1)) ⇒ X; (SP) + 2 ⇒ SP
PULY
Pull Y
(M(SP) : M(SP+1)) ⇒ Y; (SP) + 2 ⇒ SP



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