naveen,

Are you using this chip because you recovered it from some surplus device? If so you may be better off finding a chip from a more mainstream supplier. There are many Weltrend data sheets available - but not for that part.

http://www.datasheetcatalog.com/weltrends...nductor/1/

Are you using this chip because you are trying to modify some embedded device (i.e. monitor controller, keyboard controller, on-screen display device or health monitor device) to add or change some of its features? If so then you really need to contact the manufacturer. First off contact the device manufacturer since if they designed in that chip they must have the data sheet for it. Next try contacting Weltrend directly. Note two things....if the device is unique in some way it would not be surprising that Weltrend made that MCU as a custom part for the device manufacturer....and if you are going to be at all successful with any Weltrend part it is essential that you get the full data sheet because many of their parts have unique registers and I/O resources.

Note also that Weltrend parts will contain an assortment of different types of MCU cores. Some data sheets do not even tell you what kind of MCU is contained in the chip!!

Michael Karas