INTn pin is always high

Question

First of all thank you for your attention: I am using Freescale KL25z MCU as master and Wiznet w5500 chip as a slave for my project. So far I have managed to send and recieve data via wiznet correctly. Thats why there is no problem writing and reading the w5500 chip. In the next part I have to use interrupt pin in order to operate my system properly. However, I cannot make the interrupt pin low. For example when a Recieve signal comes, Sn0_IR becomes 0x05( Connect and Recieve int). Moreover the mask register Sn_IMR is FF. According to datasheet when these 2 registers becomes 1, the INTn pin is asserted to low. By the way I wrote 100 to INTLEVEL register. I also checked my system, when the int pin becomes low my system responses correctly. Furthermore there is always high signal seen by looking via scope. Is there anything that I have missed? I am waiting for your help Thank you.

irinakim · Answer

Hi~ I couldn’t look your question and I’m so sorry. You confirm the SIR and SIMR register in common register. If you use the Socket number ‘0’… The SIR and SIMR set up a bit ‘0’ as high(1). If you didn’t set bit ‘0’ in the SIR and SIMR, INTn Pin isn’t operate. thanks EK