?? fet410_fll01.c
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//******************************************************************************
// MSP-FET430P410 Demo - FLL+ clock, Runs internal DCO at 2.45Mhz
//
// Description This program demostrates setting the internal DCO to run at
// 2.4576Mhz with auto-calibration by the FLL+ circuitry.
// ACLK = LFXT1 = 32768, MCLK = SMCLK = DCO = (n+1) x ACLK
// //*An external watch crystal on XIN XOUT is required for ACLK*//
//
// MSP430F41x
// -----------------
// /|\| XIN|-
// | | | 32khz xtal
// --|RST XOUT|-
// | |
// | P1.1|--> MCLK = 2.4576Mhz
// | |
// | P1.5|--> ACLK = 32khz
// | |
//
// B. Merritt - meb
// Texas Instruments Inc.
// February 2002
// Built with IAR Embedded Workbench Version: 1.25A
//******************************************************************************
#include "msp430x41x.h"
void main(void)
{
WDTCTL = WDTPW + WDTHOLD; // Stop watchdog timer
SCFI0 |= FN_2; // x2 DCO, 4MHz nominal DCO
FLL_CTL0 = XCAP18PF; // set load capacitance for xtal
SCFQCTL = 74; // (74+1) x 32768 = 2.45Mhz
P1DIR = 0x22; // P1.1 & P1.5 to output direction
P1SEL = 0x22; // P1.1 & P1.5 to output MCLK & ACLK
while(1); // loop in place
}
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