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Figure 8.8 device attach behavior, Table 8.10 attach and reset timing values, Datasheet – SMSC USB3280 User Manual

Page 40

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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