|ARM Technical Support Knowledge Articles|
Applies to: EPM900 LPC Emulator
Information in this article applies to:
The external clock is not working with the EPM900 board. What am I doing wrong?
There are several things you must check to ensure you have properly configured your device.
From the P89LPC932 Data Sheet:
More than likely you will be using the Crystal (High Freq) option.
The 12 MHz crystal on the board is not connected to the P89LPC932 bond out chip; it is used to control the functionality of the board. If you wish to use an external clock, you will have to place your own crystal at the spot marked "user XTAL" next to the "XTAL" jumpers. The capacitors on the board (c8, c9) are 22nF, and are suited for High Frequency crystals.
You must move the XTAL jumpers from INT to EXT in order to use the additional crystal you placed on the board.
You can only use the external crystal during emulation, not during programming.
Article last edited on: 2006-11-30 10:37:55
Did you find this article helpful? Yes No
How can we improve this article?