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전자부품 데이터시트 검색엔진 |
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전자부품 데이터시트 검색엔진 |
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5238-DS03-405-R 데이터시트(PDF) 33 Page - Broadcom Corporation. |
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5238-DS03-405-R 데이터시트(HTML) 33 Page - Broadcom Corporation. |
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33 / 76 page  Advance Data Sheet BCM5238 1/31/03 Broa d c om Co rp o r a t i o n Document 5238-DS03-405-R MII Management Interface: Register Programming Page 25 1111 1111 1111 1111 1111 1111 1111 1111 0110 00001 00001 ZZ ZZZZ ZZZZ ZZZZ ZZZZ 1... For the MII read operation, the BCM5248 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. MII REGISTER MAP SUMMARY Table 16onpage 26 and Table17onpage 28 contains the MII register map summary for each port of the BCM5248. The register addresses are specified in hex form, and the name of register bits have been abbreviated. When writing to any register, preserve existing values of the reserved bits by completing a Read/Modify Write. Ignore reserved bits when reading registers. Never write to an undefined register. The reset values of the registers are shown in the INIT column. Some of these values could be different depending on how the device is configured and also depending on the device revision value. |
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