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ETHERNET COMMUNICATION MODULE
MII Management Configuration register
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Register bit
assignment
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MII Management Configuration register
Address: A060 0420
Register
Register bit
assignment
Bits Access Mnemonic Reset Description
D31:16 N/A Reserved N/A N/A
D15:00 R/W MAXF 0x0600 Maximum frame length
Default value of
0x600 represents a maximum receive
frame of 1536 octets.
An untagged maximum-size Ethernet frame is 1518
octets. A tagged frame adds four octets for a total of
1522 octets. To use a shorter maximum length
restriction, program this field accordingly.
Note: If a proprietary header is allowed, this field
should be adjusted accordingly. For exam-
ple, if 4-byte proprietary headers are
prepended to the frames, the MAXF value
should be set to 1526 octets. This allows
the maximum VLAN tagged frame plus the
4-byte header.
Reserved
Not
used
13121110987654321015 14
31 29 28 27 26 25 24 23 22 21 20 19 18 17 1630
Reserved CLKS
SPRE
RMIIM
Bits Access Mnemonic Reset Description
D31:16 N/A Reserved N/A N/A
D15 R/W RMIIM 0 Reset MII management block
Set this bit to 1 to reset the MII Management module.
D14:05 N/A Reserved N/A N/A