Samsung S3F80JB - Manual (Page 171)

S3F80JB INSTRUCTION SET
6-43
IDLE
— Idle Operation
IDLE
Operation:
The IDLE instruction stops the CPU clock while allowing system clock oscillation to continue. Idle
mode can be released by an interrupt request (IRQ) or an external reset operation.
Flags: No flags are affected.
Format:
Bytes Cycles Opcode
(Hex)
Addr Mode
dst src
opc 1 4 6F – –
Example: The instruction
IDLE
stops the CPU clock but not the system clock.