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5 INSTRUCTION SET
5.9 System Control Instructions
The following five instructions are used to control the system.
Only increments the PC, with no other operations performed
nop
Places the processor in HALT mode
halt
Places the processor in SLEEP mode
slp
Enables interrupts
ei
Disables interrupts
di
For details on HALT and SLEEP modes, refer to Section 6.4, "Power-Down Mode," and the Technical Manual for
each S1C17 model.
For details on the interrupt control, refer to Section 6.3, "Interrupts."
5-22
Seiko Epson Corporation
S1C17 CORE MANUAL
(REV. 1.2)
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