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Timing
Parameter
T0
Last bus activity.
T1
No bus activity at this point.
T2
Samples LineState[1:0]. If "J" is detected here, DetectSUSPEND
is set to "1," and a USB suspend state is determined.
T3
RESUME must not be issued before this point.
T4
Sets GoSLEEP to "1" and moves entirely to SLEEP. Beyond this
point, the current drawn from the VBUS must not exceed the
suspend current specified for USB. (Set DisBusDetect to "1"
before switching to SLEEP to prevent repeated detection of
SUSPEND.)
T5
The internal clock stops completely.
Note: Brackets {} indicate names defined in the USB 2.0 standards.
S2R72V18 Technical Manual (Rev.1.00)
Table 1-11 Suspend timing values (FS mode)
Description
EPSON
1. Functions
Value
0 (reference)
T0 + 3.0 ms < T1 {T
WTREV
T0 + 3.125 ms
T1 + 100 µs < T2 {T
WTWRSTHS
T1 + 875 µs
T0 + 5 ms {T
}
WTRSM
T0 + 10 ms {T
}
2SUSP
T5 < T4 + 10 µs
} <
} <
29
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