Fujitsu F2MCTM-16LX Manual do Utilizador descarregar pdf (Página 175)

100

101

159

CHAPTER 8 LOW-POWER CONSUMPTION MODE

The devices does not guarantee its operation after returning from the standby mode if you place an array

of instructions other than the one enclosed in the line.

●

To access the low-power consumption mode control register (LPMCR) with C language

To enter the standby mode using the low-power consumption mode control register (LPMCR), use one

of the following methods 1. to 3. to access the register:

1. Specify the standby mode transition instruction as a function and insert two __wait_nop() built-in

functions after that instruction. If any interrupt other than the interrupt to return from the standby mode

can occur within the function, optimize the function during compilation to suppress the LINK and

UNLINK instructions from occurring.

Example: Watch mode or timebase timer mode transition function

2. Define the standby mode transition instruction using __asm statements and insert two NOP and JMP

instructions after that instruction.

Example: Transition to sleep mode

3. Define the standby mode transition instruction between #pragma asm and #pragma endasm and insert

two NOP and JMP instructions after that instruction.

Example: Transition to stop mode

void enter_watch(){

IO_LPMCR.byte = 0x10; /* Set LPMCR TMD bit to 0 */

__wait_nop();

}

__asm("MOV I:_IO_LPMCR, #H’ 58); /* Set LPMCR SLP bit to 1 */

__asm("NOP");

__asm("OP");

__asm("JMP $+3"); /* Jump to the next instruction*/

#pragma asm

MOV I:_IO_LPMCR, #H’ 98 /* Set LPMCR STP bit to 1 */

NOP

JMP $+3 /* Jump to the next instruction */

#pragma endasm

1 2 ... 170 171 172 173 174 175 176 177 178 179 180 ... 681 682

Comentários a estes Manuais

Sem comentários

Fujitsu F2MCTM-16LX Manual do Utilizador Página 175

Comentários a estes Manuais

Manuais e produtos relacionados com Hardware Fujitsu F2MCTM-16LX