PMM RESET电压问题

你好！

1.Vcore是根据MCLK使用的频率进行设置的，参照datasheet就行了。

2.建议SVS和SVM都打开，增强系统上下电时的可靠性。

你好,非常感谢你的回复. 你说的是对的.

我想问你另一个问题,也是同一IC. 在Datasheet中,从LPM4.5到Active的时间是2ms(typ), 3ms(max).但我通过多次测试,都是11ms.请问怎样解决这个问题.

部分代码如下:

void main(void) {

       u8 Reset_Wait = TRUE;

       u8 LPM45_Wake_Flag = FALSE;

       u16 m_delay;

       while(Reset_Wait == TRUE)

       {

              switch( __even_in_range(SYSRSTIV, SYSRSTIV_PMMKEY) )

              {

              case SYSRSTIV_NONE:

                     Reset_Wait = FALSE;

                     break;

              case SYSRSTIV_BOR:

                     break;

              case SYSRSTIV_RSTNMI:

                     break;

              case SYSRSTIV_LPM5WU:

                     LPM45_Exit();

                     LPM45_Wake_Flag = TRUE;

                     break;

              case SYSRSTIV_SECYV:

                     break;

              case SYSRSTIV_SVSL:

                     break;

              case SYSRSTIV_SVSH:

                     break;

              case SYSRSTIV_SVML_OVP:

                     break;

              case SYSRSTIV_SVMH_OVP:

                     break;

              case SYSRSTIV_DOPOR:

                     break;

              case SYSRSTIV_WDTTO:

                     break;

              case SYSRSTIV_WDTKEY:

                     break;

              case SYSRSTIV_KEYV:

                     break;

              case SYSRSTIV_PLLUL:

                     break;

              case SYSRSTIV_PERF:

                     break;

              }

       }

       if(LPM45_Wake_Flag == FALSE) //If not wake from LPM4.5, then go to LPM4.5

       {

              LPM45_Enter();

       }

}

void LPM45_Enter()

{

       WDT_HOLD();

       //IO SET

       P1DIR = 0x7F;                     //0b00111011;

       P1REN = 0xFF;                     //Input without any pulldown or pullup resistor

       P1OUT = 0x00;                     //Input with pulldown resistor

       P1SEL = 0x00;

       P1IE  = 0x80;                     //p1.7 INPUT INTERRUPT EANALBE

       P1IES = 0x00;                            //low-to-high transition

       P1IFG = 0;                                             //Clear the interrupt flag

              //P2.4 - RFIC FSK,      P2.5 - RFIC - EN

       P2DIR = 0xFF;

       //P2REN = 0xFF;

       P2OUT = 0x00;

       P2SEL = 0x00;

              //P3

       P3DIR = 0xFF;

       //P2REN = 0xFF;

       P3OUT = 0x00;

              //PJ

       PJDIR = 0xFF;

       //P2REN = 0xFF;

       PJOUT = 0x00;

       PJSEL = 0;

       P1MAP0 = 0;                    // Map UCA0CLK

       P1MAP1 = 0;                              // Map UCA0SIMO

       P1MAP2 = 0;                     // Map UCA0SOMI

       PMAPPWD = 0;                            // Lock port mapping registers

       //models turn off

       TA0CTL = 0;                                            //Turn off all timer

       TD0CTL0       = 0;

       TD1CTL0       = 0;

       UCA0CTL1 |= UCSWRST;                                   //Disable SPI interface

       UCB0CTL1 |= UCSWRST;

       __enable_interrupt();

       //Enter LPM4.5

       PMMCTL0_H = PMMPW_H;

       PMMCTL0_L |= PMMREGOFF;

       LPM45;

}

void LPM45_Exit()

{

       PMMCTL0_H = PMMPW_H;

       PM5CTL0 &= ~LOCKIO;

       PMMCTL0_H = 0x00;

       RAIDAES_Wake = TRUE;

       Timer_Count_ms = 3;                      //Wake from lpm4.5: 2ms + XTAL set up: about 0.5 ms.

       P3DIR |= 0x01;                    //此处打开IO.并测量wake信号和此时IO的输出信号的时间差.

       P3OUT |= 0x01;

       P1IFG = 0;                        //Clear pending interrupts

       //while(1);

}