H8SXSLASH1663 datasheet(846/1158 Pages) RENESAS

部件名	H8SX/1663

功能描述	Renesas 32-Bit CISC Microcomputer H8SX Family / H8SX/1600 Series

PDF	1158 Pages

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制造商	RENESAS [Renesas Technology Corp]

网页	http://www.renesas.com

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Section 16 USB Function Module (USB)

Rev.1.00 Jun. 07, 2006 Page 794 of 1102

REJ09B0294-0100

(4) Remote-Wakeup Operation

If the USB bus enters the non-suspend (resume) state from the suspend state by the remote-

wakeup signal output from this function, perform the operation as shown in figure 16.8.

USB cable connected

USB bus in suspend state

Cancel software

standby mode

Clear SURSF in IFR2 to 0

Check if SURSS in IFR2 is

cleared to 0

Software standby

mode ?

USB module

stopped?

Oscillation

stabilization time

has passed?

Yes

Start USB operating

clock oscillation

Cancel USB module stop

Remote wakeup execution

(CTLR/RSME= 1)

Return to normal state

Yes

Bus wakeup source

generated

Remote

wakeup enabled?

(CTLR/RWUPS = 1?)

Wait for resume

from up-stream

Resume output signal

Suspend/resume

interrupt occurs.

(IFR2/SURSF = 1)

RESUME

USB function

Application

Figure 16.8 Remote-Wakeup

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