W7500P S2e chip is not working.link problem.

Question

I developed a board to use W7500P S2E chip which is preinstalled S2E feature. But it isn’t connected to network. When I debug the w7500 S2E F/W in Keil IDE, it shows Link never been successful. After phy_ini(), the link() doesn’t return return success. I am using W7500 with PHY IC in different board at the same network, it works fine. How to check PHY link is up and running correctly. I have erased the chip whole and programmed it by ULINK2 in Keil. I have 4 boards which uses the W7500P S2E preprogrammed. But none of them has been successful in link. How to check the W7500P internal PHY is up and running ? How to resolve this situation ?

jaden · Answer

안녕하세요. W7500-S2E 기반으로 커스텀 PCB를 제작하셨다면 W7500 관련 회로도부터 검토 해드리겠습니다. 본 포럼에 PDF로 업로드 부탁드립니다.

jaden · Answer

W7500P-S2E requires the use of the WIZ750SR schematic. But your schematic is very different from the WIZ750SR schematic. Add ISET resister(6.19K) on W7500P 32pin DNP R61,R62,R63,R64,C71,C73 Move LINK_LED net pin28 → pin23 Add HW_TRIG(EN AT mode) on pin 28 Add 232/485 Select pin on pin 11 pull-up is 485 Pull down is 232/TTL Add serial 0Ω on MDI line. This may be needed for EMC debugging in the future. Make sure Y3 is 12Mhz.

hanbitmicro · Answer

Thanks for your comment. I found out I missed the connection ISET to GND through 4K7. I will try put it on and get the result soon. Thanks again for your comment.