5228-DS09-405-R datasheet(48/100 Pages) BOARDCOM

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5228-DS09-405-R 데이터시트(PDF) 48 Page - Broadcom Corporation.

부품명	5228-DS09-405-R

상세설명	10/100BASE-TX/FX Octal Transceiver

PDF	100 Pages

Scroll/Zoom	100%

제조업체	BOARDCOM [Broadcom Corporation.]

홈페이지	http://www.broadcom.com

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48 / 100 page

BCM5228

Data Sheet

7/12/04

Broa d c om Co rp o r a t i o n

Page 36

MII Management Interface: Register Programming

Document

5228-DS09-405-R

At least one or more idle states are required between frames. The following shows two examples of MII write and read

instructions.

•

To put a transceiver with PHY address 00001 into Loopback mode, the following MII write instruction must be issued:

1111 1111 1111 1111 1111 1111 1111 1111

0101 00001 00000 10 0100 0000 0000 0000 1...

•

To determine if a PHY is in the link pass state, the following MII read instruction must be issued:

1111 1111 1111 1111 1111 1111 1111 1111

0110 00001 00001 ZZ ZZZZ ZZZZ ZZZZ ZZZZ 1...

For the MII read operation, the BCM5228 drives the MDIO line during the TA and Data fields (the last 17 bit times). A final

65th clock pulse must be sent to close the transaction and cause a write operation to take place.

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