Rabbit 6000 - Problem when using External I/O Bus @ 16bit

"[email protected] [rabbit-semi]" <[email protected]>
Newsgroups gmane.comp.hardware.rabbit-semiconductor
Message-ID <[email protected]> 
Hello,
I'm trying to use the Rabbit 6000 External I/O Bus @ 16bit as explained at Chapter 31 of Rabbit 6000 datasheet (http://ftp1.digi.com/support/documentation/90001108_H.pdf).
The 16bit read operation is ok.
The 16bit write operation not. The low byte is correctly written, while the high byte not.
It seems that the pins of the port H (high byte in 16bit mode) remains managed as the port is used as standard parallel port because if I set the port H as input I always see high impedance on the bus, if I set port H as output I always see the value set in PHDR register.
I have double checked the IBxER registers.

Someone can help me?

TIA
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