lan8187 Standard Microsystems Corp., lan8187 Datasheet - Page 49

• Manufacturer Part Number: lan8187
• Description: Lan8187/lan8187i ?15kv Esd Protected Mii/rmii 10/100 Ethernet Transceiver With Hp Auto-mdix & Flexpwr Technology
• Manufacturer: Standard Microsystems Corp.

±15kV ESD Protected MII/RMII 10/100 Ethernet Transceiver with HP Auto-MDIX & flexPWR
Datasheet
SMSC LAN8187/LAN8187i
5.3
5.3.1
Mask
ADDRESS
30.7
30.6
30.5
30.4
30.3
30.2
30.1
31.1
31.0
29.7
29.6
29.5
29.4
29.3
29.2
29.1
The Management interface supports an interrupt capability that is not a part of the IEEE 802.3
specification. It generates an active low asynchronous interrupt signal on the nINT output whenever
certain events are detected as setup by the Interrupt Mask Register 30.
The Interrupt system on the SMSC LAN8187/8187i has two modes, a Primary Interrupt mode and an
Alternative Interrupt mode. Both systems will assert the nINT pin low when the corresponding mask
bit is set, the difference is how they de-assert the output interrupt signal nINT.
The Primary interrupt mode is the default interrupt mode after a power-up or hard reset, the Alternative
interrupt mode would need to be setup again after a power-up or hard reset.
Primary Interrupt System
The Primary Interrupt system is the default interrupt mode, (Bit 17.6 = ‘0’). The Primary Interrupt
System is always selected after power-up or hard reset.
To set an interrupt, set the corresponding mask bit in the interrupt Mask register 30 (see
Then when the event to assert nINT is true, the nINT output will be asserted.
When the corresponding Event to De-Assert nINT is true, then the nINT will be de-asserted.
Interrupt Management
Interrupt Source Flag
Scramble Disable
Parallel Detection Fault
Remote Fault Detected
Auto-Negotiation Page
Auto-Negotiation LP
Auto-Negotiation
Reserved
Achnowledge
ENERGYON
NAME
Link Down
Received
complete
Table 5.45 Register 31 - PHY Special Control/Status (continued)
Write as 0; ignore on Read
0 = enable data scrambling
1 = disable data scrambling,
Table 5.46 Interrupt Management Table.
17.1
5.14
1.5
1.4
1.2
6.4
6.1
Interrupt Source
DATASHEET
Parallel Detection
Page Received
Auto-Negotiate
Remote Fault
Acknowledge
ENERGYON
Link Status
Complete
Fault
DESCRIPTION
49
TM
Technology
Event to Assert nINT
Rising 17.1
Rising 5.14
Falling 1.2
Rising 1.5
Rising 1.4
Rising 6.4
Rising 6.1
a
Event to De-Assert nINT
Reading register 29 or
MODE
Reading register 6, or
Reading register 6, or
Reading register 1 or
Reading register 1 or
Re-AutoNegotatie, or
Re-AutoNegotaite or
Reading register 29
Reading register 29
Reading register 29
Reading register 29
Reading register 29
Revision 1.5 (01-10-08)
RW
RW
Read register 29
Falling of 6.1 or
Falling 17.1 or
Falling 5.14 or
Falling 1.4, or
Falling 1.5 or
Falling 6.4 or
Link Down.
Link down
DEFAULT
Table
0
0
5.46).