lan9303m Standard Microsystems Corp., lan9303m Datasheet - Page 94
lan9303m
Manufacturer Part Number
lan9303m
Description
Small Form Factor Three Port 10/100 Managed Ethernet Switch With Dual Mii/rmii/turbo Mii
Manufacturer
Standard Microsystems Corp.
Datasheet
1.LAN9303M.pdf
(380 pages)
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Revision 1.3 (08-27-09)
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)
64.
Small Form Factor Three Port 10/100 Managed Ethernet Switch with Dual MII/RMII/Turbo MII
DATASHEET
94
Section 5.2.1, "Switch Fabric Interrupts,"
SMSC LAN9303M/LAN9303Mi
Datasheet
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