Stop Stop Operation - Samsung S3C9444 User Manual

SAM88RCRI INSTRUCTION SET
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 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
LD
STOP
NOP
NOP
NOP
halts all microcontroller operations. When STOPCON register is not #0A5H value, if you use STOP
instruction, PC is changed to reset address.
6-46
STOPCON, #0A5H
S3C9444/F9444_UM_REV1.10
Bytes Cycles Opcode
1 4
Addr Mode
(Hex) dst src
7F – –