ENC28J60
REGISTER 3-3:
MICMD: MII COMMAND REGISTER
U-0
—
U-0
—
U-0
—
U-0
—
U-0
—
U-0
—
R/W-0
R/W-0
MIIRD
MIISCAN
bit 7
bit 0
Legend:
R = Readable bit
-n = Value at POR
W = Writable bit
‘1’ = Bit is set
U = Unimplemented bit, read as ‘0’
‘0’ = Bit is cleared x = Bit is unknown
bit 7-2
bit 1
Unimplemented: Read as ‘0’
MIISCAN: MII Scan Enable bit
1= PHY register at MIREGADR is continuously read and the data is placed in MIRD
0= No MII Management scan operation is in progress
bit 0
MIIRD: MII Read Enable bit
1= PHY register at MIREGADR is read once and the data is placed in MIRD
0= No MII Management read operation is in progress
REGISTER 3-4:
MISTAT: MII STATUS REGISTER
U-0
—
U-0
—
U-0
—
U-0
—
R-0
r
R-0
R-0
R-0
NVALID
SCAN
BUSY
bit 7
bit 0
Legend:
R = Readable bit
-n = Value at POR
W = Writable bit
‘1’ = Bit is set
U = Unimplemented bit, read as ‘0’
‘0’ = Bit is cleared x = Bit is unknown
bit 7-4
bit 3
Unimplemented: Read as ‘0’
Reserved: Maintain as ‘0’
bit 2
NVALID: MII Management Read Data Not Valid bit
1= The contents of MIRD are not valid yet
0= The MII Management read cycle has completed and MIRD has been updated
bit 1
bit 0
SCAN: MII Management Scan Operation bit
1= MII Management scan operation is in progress
0= No MII Management scan operation is in progress
BUSY: MII Management Busy bit
1= A PHY register is currently being read or written to
0= The MII Management interface is Idle
© 2006 Microchip Technology Inc.
Preliminary
DS39662B-page 21
MICROCHIP [ MICROCHIP ]
