ISP1504CBS datasheet(21/84 Pages) PHILIPS

Nome de Peças	ISP1504CBS

Descrição Electrónicos	ULPI Hi-Speed Universal Serial Bus On-The-Go transceiver

PDF	84 Pages

Scroll/Zoom	100%

Fabricante Electrônico	PHILIPS [NXP Semiconductors]

Página de início	http://www.nxp.com

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21 / 84 page

ISP1504A_ISP1504C_1

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.

ISP1504CBS Folha de dados(PDF) 21 Page - NXP Semiconductors