Eurotech BRI ISDN Uživatelský manuál stáhnout pdf (Strana 50)

Am186™CC Microcontroller Router Reference Design User’s Manual

2-24

Detach

1. Am186CC microcontroller polls PIO42 for a logic Low level to detect a

disconnect condition from the host/hub.

2. The Am186CC microcontroller three-states USBD+ and USBD– in response

to the disconnect.

3. The Am186CC microcontroller drives PIO43 to a logic Low level, which

disables Q1 and removes the pullup (R67) from USBD+.

about.book Page 24 Wednesday, July 21, 1999 11:10 AM

1 2 ... 45 46 47 48 49 50 51 52 53 54 55 ... 99 100

Žádné komentáře

Eurotech BRI ISDN Uživatelský manuál Strana 50