enc28j60 Microchip Technology Inc., enc28j60 Datasheet - Page 23

• Manufacturer Part Number: enc28j60
• Description: Stand-alone Ethernet Controller With Spi Interface
• Manufacturer: Microchip Technology Inc.

REGISTER 3-3:
REGISTER 3-4:
© 2006 Microchip Technology Inc.
bit 7
Legend:
R = Readable bit
-n = Value at POR
bit 7-2
bit 1
bit 0
bit 7
Legend:
R = Readable bit
-n = Value at POR
bit 7-4
bit 3
bit 2
bit 1
bit 0
U-0
U-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
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
U-0
U-0
—
—
MICMD: MII COMMAND REGISTER
MISTAT: MII STATUS REGISTER
W = Writable bit
‘1’ = Bit is set
W = Writable bit
‘1’ = Bit is set
U-0
U-0
—
—
U-0
U-0
—
—
Preliminary
U = Unimplemented bit, read as ‘0’
U = Unimplemented bit, read as ‘0’
‘0’ = Bit is cleared
‘0’ = Bit is cleared
U-0
R-0
—
r
NVALID
U-0
R-0
—
x = Bit is unknown
x = Bit is unknown
ENC28J60
MIISCAN
R/W-0
SCAN
R-0
DS39662B-page 21
R/W-0
MIIRD
BUSY
R-0
bit 0
bit 0