HD6417618 RENESAS [Renesas Technology Corp], HD6417618 Datasheet - Page 270

• Manufacturer Part Number: HD6417618
• Description: 32-Bit RISC Microcomputer SuperHTM RISC engine Family / SH7618 Series
• Manufacturer: RENESAS [Renesas Technology Corp]

Section 11 Ethernet Controller (EtherC)
11.3.4
PIR is a 32-bit readable/writable register that provides a means of accessing the PHY registers via
the MII.
Rev. 6.00 Jun. 12, 2007 Page 238 of 610
REJ09B0131-0600
Bit
31 to 4 
3
2
1
0
Bit Name
MDI
MDO
MMD
MDC
PHY Interface Register (PIR)
Initial
Value
All 0
Undefined R
0
0
0
R/W Description
R
R/W MII Management Data-Out
R/W MII Management Mode
R/W MII Management Data Clock
Reserved
These bits are always read as 0. The write value should
always be 0.
MII Management Data-In
Indicates the level of the MDIO pin.
Outputs the value set to this bit from the MDIO pin,
when the MMD bit is 1.
Specifies the data read/write direction with respect to
the MII.
0: Read direction is indicated
1: Write direction is indicated
Outputs the value set to this bit from the MDC pin and
supplies the MII with the management data clock. For
the method of accessing the MII registers, see section
11.4.4, Accessing MII Registers.