ENC28J60-I/SS(2012) Ver la hoja de datos (PDF) - Microchip Technology
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ENC28J60-I/SS Datasheet PDF : 102 Pages
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ENC28J60
REGISTER 3-3: MICMD: MII COMMAND REGISTER
U-0
U-0
U-0
U-0
U-0
—
—
—
—
—
bit 7
U-0
R/W-0
R/W-0
—
MIISCAN
MIIRD
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
bit 0
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
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
bit 7
R-0
NVALID
R-0
SCAN
R-0
BUSY
bit 0
Legend:
R = Readable bit
-n = Value at POR
r = Reserved bit
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
bit 2
bit 1
bit 0
Unimplemented: Read as ‘0’
Reserved: Maintain as ‘0’
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
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
2006-2012 Microchip Technology Inc.
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DS39662E-page 21
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