USB hadanka

[Zuffa Jan]

500uA

-----Original Message-----
From: Hw-list [mailto:hw-list-bounces na list.hw.cz] On Behalf Of Jan Waclawek
Sent: Friday, August 25, 2017 12:20 PM
To: HW-news
Subject: Re: USB hadanka

Aha zabudol som dodat, ze ten pullup je v danom pripade zaintegrovany v tom
STM32F407 (ako to je u modernych mcu s USB uz viacmenej standard).

wek


----- Original Message ---------------
>USB device (t.j. nie host, ale "slave") oznamuje hostovi ze je Full Speed (12Mbps) tak, ze k jednej datovej linke pripoji nominalne 1k5 pullup voci 3V napajaniu. Na STM32F407 (na doske DISCO-F4) som v programe zapol ten pullup a bez pripojenia k hostovi som na dany datovy pin pripojil ampermeter voci zemi. Aky prud som nameral?

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