Problem to exit DRUN Mode

borjagomez — Mon, 08 Jun 2015 14:12:49 GMT

Dear Sir / Madam

I am working with MPC5606B uC. I have imported an example project from import wizard and when i have tried to debug it I have found problems to enter any mode different from DRUN mode. For instance, if I tried to enter the RUN0 mode (please find below source code) no transition to this mode is produced. I am using TRK-MPC560xB evaluation board.

What problems may cause the microcontroller not to enter in running modes?

ME.MER.R = 0x0000001D; /* Enable DRUN, RUN0, SAFE, RESET modes */

/* Initialize PLL before turning it on: */

/* Use 2 of the next 4 lines depending on crystal frequency: */

CGM.CMU_CSR.R = 0x000000004; /* Monitor FXOSC > FIRC/4 (4MHz); no PLL monitor */

CGM.FMPLL_CR.R = 0x02400100; /* 8 MHz xtal: Set PLL0 to 64 MHz */

ME.RUN[0].R = 0x001F0074; /* RUN0 cfg: 16MHzIRCON,OSC0ON,PLL0ON,syclk=PLL0 */

/* Mode Transition to enter RUN0 mode: */

ME.MCTL.R = 0x40005AF0; /* Enter RUN0 Mode & Key */

ME.MCTL.R = 0x4000A50F; /* Enter RUN0 Mode & Inverted Key */

while (ME.GS.B.S_MTRANS == 1) {} /* Wait for mode transition to complete */

/* Notes: */

/* 1. I_TC IRQ could be used here instead of polling */

/* to allow software to complete other init. */

/* 2. A timer could be used to prevent waiting forever.*/

while(ME.GS.B.S_CURRENTMODE != 4) {} /* Verify RUN0 is the current mode */

/* Note: This verification ensures a SAFE mode */

/* transition did not occur. SW could instead */

/* enable the safe mode transition interrupt */

Thank you in advance,

Borja Gomez

topic Problem to exit DRUN Mode in MPC5xxx

Problem to exit DRUN Mode