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HD6417618 Folha de dados(PDF) 285 Page - Renesas Technology Corp

Nome de Peças HD6417618
Descrição Electrónicos  32-Bit RISC Microcomputer SuperHTM RISC engine Family / SH7618 Series
PDF  646 Pages
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Fabricante Electrônico  RENESAS [Renesas Technology Corp]
Página de início  http://www.renesas.com
Logo RENESAS - Renesas Technology Corp

HD6417618 Folha de dados(HTML) 285 Page - Renesas Technology Corp

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Section 11 Ethernet Controller (EtherC)
Rev. 6.00 Jun. 12, 2007 Page 253 of 610
REJ09B0131-0600
MII Register Access Procedure: The program accesses MII registers via the PHY interface
register (PIR). Access is implemented by a combination of 1-bit-unit data write, 1-bit-unit data
read, bus release, and independent bus release. Figure 11.9 shows the MII register access timing.
The timing will differ depending on the PHY type.
MDC
(1)
(1) (2)
(3)
MDO
(2)
(3)
Write to PHY interface
register
1-bit data write timing
relationship
MMD = 1
MDO = write data
MDC = 0
MMD = 1
MDO = write data
MDC = 1
Write to PHY interface
register
MMD = 1
MDO = write data
MDC = 0
Write to PHY interface
register
Figure 11.6 (1) 1-Bit Data Write Flowchart



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