ISP1507B1HNTM STEricsson, ISP1507B1HNTM Datasheet - Page 42

• Manufacturer Part Number: ISP1507B1HNTM
• Manufacturer: STEricsson

Specifications of ISP1507B1HNTM

• Lead Free Status / RoHS Status: Compliant

CD00269905
Product data sheet
10.10.3 Remote wake-up
The ISP1507x1 supports peripherals that initiate remote wake-up resume. When placed
into USB suspend, the peripheral link remembers at what speed it was originally
operating. Depending on the original speed, the link follows one of the protocols detailed
here. In
shown.
The sequence of events related to a host and a peripheral, both with ISP1507x1, is as
follows:
1. Both the host and the peripheral are assumed to be in low-power mode.
2. The peripheral begins remote wake-up by re-enabling its clock and setting its
3. The peripheral begins driving K on the bus to signal resume. Note that the peripheral
4. The host recognizes the resume, re-enables its clock and sets its SUSPENDM bit.
5. The host takes over resume driving within 1 ms of detecting the remote wake-up.
6. The peripheral stops driving resume.
7. The peripheral sees the host continuing to drive resume.
8. The host stops driving resume and the ISP1507x1 automatically adds the EOP to the
9. Both the host and the peripheral revert to normal operation by writing 00b to
SUSPENDM bit to 1b.
link must assume that LINESTATE is K (01b) while transmitting because it will not
receive any RXCMDs.
end of resume. The peripheral recognizes the EOP as the end of resume.
OPMODE. If the host or the peripheral was previously in high-speed mode, it must
revert to high-speed before the SE0 of the EOP is completed. This can be achieved
by writing XCVRSELECT[1:0] = 00b and TERMSELECT = 0b after LINESTATE
indicates SE0.
Figure
18, timing is not to scale, and not all RXCMD LINESTATE updates are
Rev. 03 — 26 July 2010
ISP1507A1; ISP1507B1
ULPI HS USB OTG transceiver
© ST-ERICSSON 2010. All rights reserved.
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