Stop Operation - Samsung S3C9228 User Manual

SAM88RI INSTRUCTION SET
STOP

— Stop Operation

STOP
Operation:
The STOP instruction stops 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 External interrupt input. 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:
opc
Example: The statement
STOP
halts all microcontroller operations.
6-46
S3C9228/P9228_UM_REV1.10
Bytes Cycles Opcode
1 4
Addr Mode
(Hex) dst src
7F – –