Zilog Z8F0130 Manuel d'utilisateur Page 106

  • Télécharger
  • Ajouter à mon manuel
  • Imprimer
  • Page
    / 314
  • Table des matières
  • MARQUE LIVRES
  • Noté. / 5. Basé sur avis des utilisateurs
Vue de la page 105
eZ8
CPU Core
User Manual
UM012820-0810 ATM Instruction
91
ATM
Definition
Atomic Execution.
Syntax
ATM
Operation
This new eZ8 instruction blocks all interrupt and DMA requests during
execution of the next 3 instructions.
Description
The Atomic instruction forces the eZ8 CPU to execute the next 3 instruc-
tions as a single block (that is, atom) of operations. During execution of
these next 3 instructions, all interrupts and DMA requests are prevented.
This allows operations to be performed on multibyte registers and mem
-
ory locations that could be changed or used by interrupts or DMA. One
example of potential use of the ATM instruction is during adjustment of
multibyte stack pointer value.
Flags
C Unaffected
Z Unaffected
S Unaffected
V Unaffected
D Unaffected
H Unaffected
MIE Unaffected
Vue de la page 105
1 2 ... 101 102 103 104 105 106 107 108 109 110 111 ... 313 314

Commentaires sur ces manuels

Pas de commentaire