9914 serial poll active

[sma]

I'm utilizing the 9914ASIC to develope an interface.  The system following intialization is generating a Serial Poll Active interrupt, the Serial Poll Response register is set to 0x0 during intialization.

The interrupt occurs almost straight away and it appears that no other activity generates an interrupt.

The 9914 is set to be only a talker and listener during tinitalization.

The initalization sequence has been extracted from section 5 the reference guide for the ASIC can any one provide some insight to prevent this. 

[Steven_T]

Hello sma,

Does this problem  happen even when the GPIB cable is not connected? 

In order for an interrupt to not happen you could unassert the interrupt enable for that Bit.  Then before you enable the interrupt you could clear the conditions that set this interrupt.  You can find the details for what sets the serial poll response in the manual.

Steven T.