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ISP1504CBS Datasheet(PDF) 21 Page - NXP Semiconductors

Part # ISP1504CBS
Description  ULPI Hi-Speed Universal Serial Bus On-The-Go transceiver
PDF  84 Pages
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Manufacturer  PHILIPS [NXP Semiconductors]
Direct Link  http://www.nxp.com
Logo PHILIPS - NXP Semiconductors

ISP1504CBS Datasheet(HTML) 21 Page - NXP Semiconductors

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ISP1504A_ISP1504C_1
© NXP B.V. 2006. All rights reserved.
Product data sheet
Rev. 01 — 19 October 2006
21 of 84
NXP Semiconductors
ISP1504A; ISP1504C
ULPI HS USB OTG transceiver
completed. After every reset, an RXCMD is sent to the link to update USB status
information. After this sequence, the ULPI bus is ready for use and the link can start USB
operations.
If a crystal is attached or a clock is driven into the XTAL1 pin, the ISP1504 will drive a
60 MHz clock out from the CLOCK pin when DIR de-asserts. This is shown as CLOCK
(output) in Figure 6. If no crystal is attached and a 60 MHz clock is driven into the CLOCK
pin, DIR will de-assert when internal clocks have synchronized. This is shown as CLOCK
(input) in Figure 6.
The recommended power-up sequence for the link is as follows:
• The link waits for 1 ms, ignoring all the ULPI pin status.
• The link may start to detect DIR status level. If DIR is detected as LOW for three clock
cycles, the link may send a RESET command.
• The ULPI interface is ready for use.



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