Promlem with the MC9S12D64's PLL with USB Multilink | 68HC12

I use the P&E USB HCS08/HCS12 Multilink as the development tool, the target is the 80 pins MC9S12D64. This board is a simple circuit, I use a 16MHz quartz crystal with the Colpitts configuration. With the REFDV=1 and the SYNR=2, the CPU bus frequence is 24MHz. The PLL initialization application have a delay before switch the system clock to the PLLCLK, but when I switch the clock source with the USB HCS08/HCS12 Multilink the program runs away. And after down load the program to the target, turn on the power or reset the target without the USB HCS08/HCS12 Multilink the PLL works well. What is the problem, can anybody help me?

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Hello: Please ensure that the "sych to PLL frequency change" checkbox is checked (this is in the debugger options dialog). If you're still having problems, feel free to e-mail me off-list so that I can get some more details from you (possibly a source code snippet) so we can get you up and running! Regards, Mark P&E shcaoyh wrote: > I use the P&E USB HCS08/HCS12 Multilink as the development tool, >the target is the 80 pins MC9S12D64. This board is a simple circuit, >I >use a 16MHz quartz crystal with the Colpitts configuration. With the >REFDV=1 and the SYNR=2, the CPU bus frequence is 24MHz. The PLL >initialization application have a delay before switch the system >clock >to the PLLCLK, but when I switch the clock source with the USB >HCS08/HCS12 Multilink the program runs away. And after down load the >program to the target, turn on the power or reset the target without >the USB HCS08/HCS12 Multilink the PLL works well. > What is the problem, can anybody help me? > >Yahoo! Groups Links -- -- ____________________________ *Mark L. Cukier*, /Design Engineer/ P&E Microcomputer Systems 656 Beacon Street, Floor 2 Boston, MA 02215 _________________________________ e-mail: mark@mark... <mailto:mark@mark...> phone : (617) 353-9206 x19 fax : (617) 353-9205 _________________________________ visit us on the web at: http: //www.pemicro.com

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Discussion Groups | 68HC12 | Promlem with the MC9S12D64's PLL with USB Multilink

Promlem with the MC9S12D64's PLL with USB Multilink - shcaoyh - Jun 20 10:19:00 2005

Re: Promlem with the MC9S12D64's PLL with USB Multilink - Mark L. Cukier - Jun 20 10:27:00 2005