SMSC USB3280 Manual do Utilizador descarregar pdf (Página 40)

Hi-Speed USB Device PHY with UTMI Interface

Datasheet

Revision 1.5 (11-15-07) 40 SMSC USB3280

DATASHEET

Figure 8.8 Device Attach Behavior

Table 8.10 Attach and Reset Timing Values

TIMING

PARAMETER DESCRIPTION VALUE

T0 Vbus Valid. 0 (reference)

T1 Maximum time from Vbus valid to when the device

must signal attach.

T0 + 100ms < T1

T2

(HS Reset T0)

Debounce interval. The device now enters the HS

Detection Handshake protocol.

T1 + 100ms < T2

1 2 ... 35 36 37 38 39 40 41 42 43 44

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