No link and LEDs are light-up with no cable plugged-in(W5500))
Ethernet Chips
No replies yet. Be the first to reply.
Join the discussion.
Ethernet Chips
No replies yet. Be the first to reply.
Join the discussion.
Share projects and connect with makers.
Joined before the site update? first.
New to WIZnet Makers?
We sent a verification link to your address. Open it to activate your account, then log in.
Accounts from this email provider are reviewed by an administrator after verification. Approval usually takes one business day.
Already have an account?
Enter your email address. If it belongs to an account, we'll send a link to set a new password. Members who joined before the site update use this to set their password.
If an account uses that address, we sent a link to set a new password. The link works once and expires in 30 minutes.
Know your password?
Need an account?
RE: No link and LEDs are light-up with no cable plugged-in(W5500))
by Eugeny ·
If chip did not die because of overheating (or any other issue like shortage), then there’s some contact issue. Use magnifier/microscope to examine the soldering. Where’s R26? Hopefully oscillation circuit did not fail because of its missing.
RE: RE: No link and LEDs are light-up with no cable plugged-in(W5500))
by Igor ·
R26 is in place. Oscillation is working well(even without R26). Chip was brand new, and it worked well for a while, before malfunction. I just don’t get why. Voltages are fine, SPI connection working. There are no any shortages or something, soldering is pretty clean.
Maybe it’s RSVD pins pulldown resistors values? I tried 10k, shorting to GND and left unconnected as well(in datasheet they should be NC except pin 23).Same behaviour. I even have bought arduino module with W5500, to just reverse it’s schematic. But schematic is the same, lol.
RE: No link and LEDs are light-up with no cable plugged-in(W5500))
by Eugeny ·
So chip is not dead, something is going on with PHY.
What PHYCFGR says?
I do not think so but you have placeholders and can play with them. But it seems you have done it.
Did you check analog 3.3V?
RE: No link and LEDs are light-up with no cable plugged-in(W5500))
by Igor ·
Hi again!
I decided to just check and solder most of caps from working chinese module(RSVD pull-up resistors as well). TOCAP capacitor is 100nF on chinese module, but should be 4.7uF regarding to datasheet, but i soldered it on my board as well(these modules are working somehow, so why not).
I’ve also soldered new chip and R26, clock is fine, 25MHz on oscilloscope.
PHYCFGR is 0xB8(0b10111000) with cable plugged-in and 0xBA(0b10111010) without cable.
So LINK is down
Analog 3.3V is fine, digital as well(added extra 4.7uF caps).
BUT, after some time all leds started glowing again and chip became inaccessible over SPI, MISO is always LOW. I’ll check soldering tomorrow, but seems it’s fine at quick glance.
RE: No link and LEDs are light-up with no cable plugged-in(W5500))
by Eugeny ·
Is it 3V (as in circuit) or 3.3V? While datasheet is stating operating voltage of 2.97 to 3.63, I’d be cautious as chip heats over time and may have issues at 2.97 or will require more current on lower voltage and would heat even more.
Do you supply enough current to the chip?
RE: No link and LEDs are light-up with no cable plugged-in(W5500))
by Igor ·
In case, if some will face some trouble: This was a crappy crystal oscillators.
External generator solved the problem.