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Motore di ricerca datesheet componenti elettronici |
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Motore di ricerca datesheet componenti elettronici |
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5228-DS05-R Scheda tecnica(PDF) 48 Page - Broadcom Corporation. |
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5228-DS05-R Scheda tecnica(HTML) 48 Page - Broadcom Corporation. |
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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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