Hello,
I work with an controller (with two crystals - 32.768kHz and 18.432MHz). When the controller starts only the 32.768kHz crystal is working - the main crystal is only working if I turn it on by software.
At the moment I've no main crystal - only the 32.768kHz crystal installed; if I download some code to the internal memory I use for the "max. JTAG clock option" 1MHz - what is the relation between this Jtag clock and the crystal from the controller? I've thought, that I'll not be able to store some code within the controller with a higher frequency then the crystal is running...
best regards Scott Alan
could you imagine what would be the problem for the low AC voltage at the crystal? 1) 32 kHz crystals are tricky 2) based on comments on the latest '51s from Arghmel, Arghmel has 'forgotten' how to make good oscillators. 3) Keil forum is really not about oscillators and such, but about the Keil tools, there is a therad in an appropiate forum www.8052.com/.../read.phtml regarding making 32kHz xtals 'sing'.
Erik