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Fix pullup for USBDP #2

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opened 2024-01-05 00:04:51 +01:00 by sebastian · 0 comments
sebastian commented 2024-01-05 00:04:51 +01:00
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See: AN4879 - USB FS downstream port

Figure 7. USB FS upstream port without embedded pull-up resistor in bus-powered applications

Better would be Figure 5. USB FS upstream port without embedded pull-up resistor in self-powered applications, however, the pullup straight to VCC also works well enough,

See: [AN4879 - USB FS downstream port](https://www.st.com/content/ccc/resource/technical/document/application_note/group0/0b/10/63/76/87/7a/47/4b/DM00296349/files/DM00296349.pdf/jcr:content/translations/en.DM00296349.pdf) ![Figure 7. USB FS upstream port without embedded pull-up resistor in bus-powered applications](https://forgejo.zenerdio.de/attachments/e890f8b0-6afd-4427-ad65-a30cc084cd62) Better would be `Figure 5. USB FS upstream port without embedded pull-up resistor in self-powered applications`, however, the pullup straight to VCC also works well enough,
2024-01-05-123525_819x351_scrot.png
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sebastian referenced this issue from a commit 2024-01-05 14:13:20 +01:00
Fixed USB pullup.
sebastian added reference refs/tags/v1.0 2024-01-05 14:13:26 +01:00
sebastian changed title from Fix pullup for USB-D+ to Fix pullup for USBDP 2024-01-05 14:16:47 +01:00
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Reference: sebastian/cheapsdo-hardware#2
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