ICG Programming problem in FEI mode for bus frequency

priyanto — Wed, 14 Jun 2006 08:02:23 GMT

Hi All,

To reduce external component, we are not using external components for system clock generation. So I use FEI mode and followed the example #3 on manual p.114 to generate 5.4 MHz bus clock with value of ICGC1 = $28 and ICGC2 = $31. Then I use this bus clock to drive TPM1 timer which I program the bits CLKSB:CLKSA equals to 0:1 (BUSCLK). I want to use TPM1 as base system timer. However, it does not seem the timer is using the value of the programmed bus clock (5.4MHz). FYI, I use the demo board which has 32KHz external crystal, and it seems the timer is still using the external clock. Another interesting point is that if I program using "Device Initialization" wizard on CW for ICGC1 value, it does not take it. Any idea why the programmed ICG values don't take effect? Thanks for any responses.

Rgds,

-priyanto.

Re: ICG Programming problem in FEI mode for bus frequency

priyanto — Thu, 15 Jun 2006 02:59:58 GMT

Hi,

Sorry, I was wrong. I could program ICGC1 and ICGC2 of MCS908GB60 in FEI mode correctly. In fact, I can change the bus frequency "on the fly" and my M69DEMO908GB60 demo board responds accordingly. Thanks.

-priyanto.

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ICG Programming problem in FEI mode for bus frequency

Re: ICG Programming problem in FEI mode for bus frequency