ARM Technical Support Knowledge Articles

IS THE CLOCK SPEED 40MHZ OR 20MHZ

Applies to: MCB167 Evaluation Board

Answer


Information in this article applies to:


QUESTION

Does the MCB167 run at 40MHz or at 20MHz? There seems to be a lot of conflicting information regarding this.

ANSWER

The MCB167 supports the C167 with the 20MHz internal clock. Infineon changed the clock generator several times and originally, the C167 used a 40MHz oscillator that was divided by 2. Now, a PLL is used to double, triple, or quadruple the oscillator speed to get the internal 20MHZ.

So, the C167 runs at 20MHZ internally. And, the MCB167 supports this speed.

MORE INFORMATION

For more information about the MCB167 evaluation board, refer to the following URL: http://www.keil.com/mcb167

Article last edited on: 2005-05-26 11:35:43

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