Part Number: MSP430F149
what is the expected ESR of the load capacitor at 4 MHz . I was not able to find that information from TI datasheet or application note.
this is how we configure the clock and we use MSP 430F149 and ECS-SR-B, ceramic resonator
int MSP_Init( void )
{
_DINT(); /* Disable interrupts if returning from application code. */
/*-----------------------------\
| Disable the watchdog.
\-----------------------------*/
WDTCTL = WDTPW | WDTHOLD;
/*---------------------------------------------------------------\
| Start the LXFT1 (external oscillator) and wait for it to
| come up. Then set it up to drive MCLK.
\---------------------------------------------------------------*/
BCSCTL1 |= XTS; // Set XTS bit to select LFXT1 oscillator
_BIC_SR(OSCOFF); // Turn on Oscillator
for (;;) // Wait for Oscillator to stablize
{
IFG1 &= ~OFIFG; // Clear Osc Fault interrupt flag
Delay(1); // Must delay 50us for flag to be valid
if ( (IFG1 & OFIFG) == 0 )
break;
}
BCSCTL2 |= SELM_3; // Selects Main Clk source to be LFTX1 oscillator
etc.
