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Excess Hibernate Current When XTAL Used for CLKIN

Question asked by jobo23 Employee on Jan 22, 2009
Latest reply on Jan 22, 2009 by jobo23

We are using a BF537 processor in our design and we are trying to reduce costs on the board.  Our previous design used an oscillator to control the CLKIN pin of the Blackfin, but we've chosen to replace this with a crystal.  When using the crystal, we noticed that our hibernate current increased by ~300uA!!  With the oscillator, it was well within ADI's specification at ~25uA, and we didn't change anything else...what's wrong?