KS57C2308/P2308/C2316/P2316
SAM47 INSTRUCTION SET
5-87
STOP
— Stop Operation
STOP
Operation:
Operand
Operation Summary
Bytes
Cycles
–
Engage CPU stop mode
2
2
Description:
The STOP instruction stops the system clock by setting bit 3 of the power control register
(PCON) to logic one. When STOP executes, all system operations are halted with the exception
of some peripheral hardware with special power-down mode operating conditions.
In application programs, a STOP instruction must be immediately followed by at least three NOP
instructions. This ensures an adequate time interval for the clock to stabilize before the next
instruction is executed. If more than three NOP instructions are not used after STOP instruction,
leakage current could be flown because of the floating state in the internal bus.
Operand
Binary Code
Operation Notation
–
1
1
1
1
1
1
1
1
PCON.3
←
1
1
0
1
1
0
0
1
1
Example:
Given that bit 3 of the PCON register is cleared to logic zero, and all systems are operational, the
instruction sequence
STOP
NOP
NOP
NOP
sets bit 3 of the PCON register to logic one, stopping all controller operations (with the exception
of some peripheral hardware). The three NOP instructions provide the necessary timing delay for
clock stabilization before the next instruction in the program sequence is executed.
Содержание C2316
Страница 30: ...ADDRESS SPACES KS57C2308 P2308 C2316 P2316 2 22 NOTES ...
Страница 168: ...SAM47 INSTRUCTION SET KS57C2308 P2308 C2316 P2316 5 94 NOTES ...
Страница 170: ......
Страница 206: ...POWER DOWN KS57C2308 P2308 C2316 P2316 8 8 NOTES ...
Страница 210: ...RESET KS57C2308 P2308 C2316 P2316 9 4 NOTES ...
Страница 222: ...I O PORTS KS57C2308 P2308 C2316 P2316 10 12 NOTES ...
Страница 272: ...LCD CONTROLLER DRIVER KS57C2308 P2308 C2316 P2316 12 24 NOTES ...
Страница 280: ...SERIAL I O INTERFACE KS57C2308 P2308 C2316 P2316 13 8 NOTES ...
Страница 294: ...MECHANICAL DATA KS57C2308 P2308 C2316 P2316 15 2 NOTES ...
Страница 310: ...KS57P2308 P2316 OTP KS57C2308 P2308 C2316 P2316 16 16 NOTES ...
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