NEC PD754244 Manuel D’Utilisation

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CHAPTER 11   INSTRUCTION SET
289
User’s Manual  U10676EJ3V0UM
11.4.14  CPU control instruction
HALT
Function:  PCC.2 
 1
Sets the HALT mode (this instruction sets the bit 2 of the processor clock control register).
Caution
Make sure that a NOP instruction follows the HALT instruction.
STOP
Function:  PCC.3 
 1
Sets the STOP mode (this instruction sets the bit 3 of the processor clock control register).
Caution
Make sure that a NOP instruction follows the STOP instruction.
NOP
Function:  Executes nothing but consumes 1 machine cycle.