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S3C84E5/C84E9/P84E9 INSTRUCTION SET
6-81
STOP — Stop Operation
STOP
Operation: The STOP instruction stops the both the CPU clock and system clock and causes the
microcontroller to enter Stop mode. During Stop mode, the contents of on-chip CPU registers,
peripheral registers, and I/O port control and data registers are retained. Stop mode can be released
by an external reset operation or by external interrupts. For the reset operation, the RESET pin
must be held to Low level until the required oscillation stabilization interval has elapsed.
Flags: No flags are affected.
Format:
Bytes Cycles Opcode
(Hex)
Addr Mode
dst src
opc 1 4 7F – –
Example: The statement STOP halts all microcontroller operations.