msp430x47xx_svs_01.c

I2c details for MSP430

//*******************************************************************************
//   MSP430x47xx Demo - SVS, POR @ 2.5V Vcc
//
//  Description: The SVS POR feature is used to disable normal operation that
//  toggles P5.1 by xor'ing P5.1 inside of a software loop.
//  In the example, when VCC is above 2.5V, the MSP430 toggles P5.1. When VCC is
//  below 2.5V, the SVS resets the MSP430, and no toggle is seen.
//  ACLK= n/a, MCLK= SMCLK= default DCO =32 x ACLK = 1048576Hz
//  
//
//                 MSP430x47xx
//             -----------------
//         /|\|              XIN|-
//          | |                 |
//          --|RST          XOUT|-
//            |                 |
//            |             P5.1|-->LED
//
//  P. Thanigai / K.Venkat
//  Texas Instruments Inc.
//  November 2007
//  Built with CCE Version: 3.2.0 and IAR Embedded Workbench Version: 3.42A
//******************************************************************************

#include  <msp430x47x4.h>

void main(void)
{
  WDTCTL = WDTPW + WDTHOLD;                 // Stop watchdog timer
  P5DIR |= BIT1;                            // Set P1.0 to output direction
  SVSCTL = 0x60 + PORON;                    // SVS POR enabled @ 2.5V

  for (;;)
  {
    volatile unsigned int i;
    i = 50000;                              // Delay
    do (i--);
    while (i != 0);
    P5OUT ^= BIT1;                          // Toggle P1.0 using exclusive-OR
  }
}