LAN9303I-ABZJ SMSC, LAN9303I-ABZJ Datasheet - Page 87

• Manufacturer Part Number: LAN9303I-ABZJ
• Description: Ethernet ICs 3 Port 0/100 Ether Switch MII/RMII/Turb
• Manufacturer: SMSC

Specifications of LAN9303I-ABZJ

• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Small Form Factor Three Port 10/100 Managed Ethernet Switch with Single MII/RMII/Turbo MII
Datasheet
SMSC LAN9303/LAN9303i
6.5.7
6.6
Counters
A counter is maintained per port that contains the number of packets dropped due to buffer space limits
and ingress rate limit discarding (Red and random Yellow dropping). These counters are accessible
via the following registers:
A counter is maintained per port that contains the number of packets dropped due solely to ingress
rate limit discarding (Red and random Yellow dropping). This count value can be subtracted from the
drop counter, as described above, to obtain the drop counts due solely to buffer space limits. The
ingress rate drop counters are accessible via the following registers:
The Switch Fabric is capable of generating multiple maskable interrupts from the Buffer Manager,
Switch Engine, and MACs. These interrupts are detailed in
on page
Switch Fabric Interrupts
Buffer Manager Port 0 Drop Count Register (BM_DRP_CNT_SRC_0)
Buffer Manager Port 1 Drop Count Register (BM_DRP_CNT_SRC_1)
Buffer Manager Port 2 Drop Count Register (BM_DRP_CNT_SRC_2)
Buffer Manager Port 0 Ingress Rate Drop Count Register (BM_RATE_DRP_CNT_SRC_0)
Buffer Manager Port 1 Ingress Rate Drop Count Register (BM_RATE_DRP_CNT_SRC_1)
Buffer Manager Port 2 Ingress Rate Drop Count Register (BM_RATE_DRP_CNT_SRC_2)
57.
DATASHEET
87
Section 5.2.1, "Switch Fabric Interrupts,"
Revision 1.4 (07-07-10)