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AD9859 datasheet unclear at ASF register

Question asked by zuzu on May 9, 2011
Latest reply on Jul 7, 2011 by JLKeip

Hello friends,

 

Studying AD9859, I noticed some discrepancies I like to clear:

 

At pag. 16, on Amplitude Scale Factor description, datasheet says .... 10-bit amplitude scale factor used in the output shaped
keying (OSK) operation..... but on register map description (Table 5), ASF register has 14 bits for amplitude scale factor.

Also in figure 1, the bus for ASF is 10 bit wide.

 

So which one is it? 10 or 14 bits for amplitude scale factor ? If 10 bits is correct, then ASF[13:10] bits should be n/u.

 

Can somebody clarify, thanks very much.

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