lan8720 Standard Microsystems Corp., lan8720 Datasheet - Page 46

• Manufacturer Part Number: lan8720
• Description: Small Footprint Rmii 10/100 Ethernet Transceiver With Hp Auto-mdix Support
• Manufacturer: Standard Microsystems Corp.

Revision 1.0 (04-15-09)
ADDRESS
ADDRESS
ADDRESS
27.10:5
28.15:0
29.15:8
27.3:0
27.15
27.14
27.13
27.12
27:11
27.4
29.7
29.6
29.5
29.4
29.3
29.2
CH_SELECT
AMDIXCTRL
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
SQEOFF
NAME
NAME
NAME
XPOL
INT6
INT3
INT7
INT5
INT4
INT2
Table 5.33 Register 28 - Special Internal Testability Controls
Table 5.32 Register 27 - Special Control/Status Indications
Table 5.34 Register 29 - Interrupt Source Flags
HP Auto-MDIX control
0 - Auto-MDIX enable
1 - Auto-MDIX disabled (use 27.13 to control channel)
Reserved
Manual Channel Select
0 - MDI -TX transmits RX receives
1 - MDIX -TX receives RX transmits
Write as 0. Ignore on read.
Disable the SQE (Signal Quality Error) test
(Heartbeat):
0 - SQE test is enabled.
1 - SQE test is disabled.
Write as 0. Ignore on read.
Polarity state of the 10Base-T:
0 - Normal polarity
1 - Reversed polarity
Reserved
Do not write to this register. Ignore on read.
Ignore on read.
1 = ENERGYON generated
0 = not source of interrupt
1 = Auto-Negotiation complete
0 = not source of interrupt
1 = Remote Fault Detected
0 = not source of interrupt
1 = Link Down (link status negated)
0 = not source of interrupt
1 = Auto-Negotiation LP Acknowledge
0 = not source of interrupt
1 = Parallel Detection Fault
0 = not source of interrupt
DATASHEET
DESCRIPTION
DESCRIPTION
DESCRIPTION
46
Small Footprint RMII 10/100 Ethernet Transceiver with HP Auto-MDIX Support
SMSC LAN8720/LAN8720i
MODE
MODE
MODE
NASR
RW,
RW
RW
RW
RW
RW
RO/
RO/
RO/
RO/
RO/
RO/
RO/
RO
RO
RW
LH
LH
LH
LH
LH
LH
LH
DEFAULT
DEFAULT
DEFAULT
000000
XXXXb
Datasheet
N/A
0
0
0
0
0
0
X
X
X
X
X
X
0