topic Re: MC9S08QE8 - External Crystal (32.768kHz) doesn't work in 8-bit Microcontrollers

MC9S08QE8 - External Crystal (32.768kHz) doesn't work

ef24096 — Fri, 09 May 2008 16:02:24 GMT

Hi all,

i'am working with the DEMOQE board from PEmicro. Daugther Card: MC9S08QE8

I have a problem with the External Clock Source, an 32.768 kHz crystal. (C8, C9, Rf not populate)
The FLL is in FEE Mode, but the crystal doesn't work.

ICSC1 = 0x00; /* Initialization of the ICS control register 1 */
/* ICSC2: BDIV=0,RANGE=0,HGO=0,LP=0,EREFS=1,ERCLKEN=1,EREFSTEN=1 */
ICSC2 = 0x07; /* Initialization of the ICS control register 2 */
while(!ICSSC_OSCINIT) { } /* Wait until the initialization of the external crystal oscillator is completed */
/* ICSSC: DRST_DRS=0,DMX32=1 */
/* Initialization of the ICS status and control */
ICSSC = (ICSSC & (unsigned char)~0xC0) | (unsigned char)0x20;

The same Code with the MC9S08QE128 Daughter Card works.

Have anyone an Idea where the problem is?

Thank's for the support.

Re: MC9S08QE8 - External Crystal (32.768kHz) doesn't work

JimDon — Fri, 09 May 2008 20:21:38 GMT

I seem to have the saem probem.
The xtal works on a DEMOQE128, it worked on a SOIC28 QE8 but not on a SOIC20 pin package.
( no external parts,as per spec).
Which package are you using?

Re: MC9S08QE8 - External Crystal (32.768kHz) doesn't work

ef24096 — Fri, 09 May 2008 21:28:18 GMT

I am using the MC9S08QE8 in an 32 L-QFP - the oscillator doesn't work!

Re: MC9S08QE8 - External Crystal (32.768kHz) doesn't work

JimDon — Fri, 09 May 2008 22:46:51 GMT

Later tonight I will double check, I changed the xtal, but I assumed I made made some other error in building, but did not peruse it further.

You should open a support case on this.

Re: MC9S08QE8 - External Crystal (32.768kHz) doesn't work

ef24096 — Fri, 09 May 2008 23:01:42 GMT

I did this!

I am also in contact with the Freescale FAE - I hope of a solution...