KSZ8851-16MLL_15 Datasheet, PDF (74/86 Pages) Micrel Semiconductor – Single-Port Ethernet MAC Controller with 8-Bit or 16-Bit Non-PCI Interface

Micrel, Inc.
KSZ8851-16MLL/MLLI/MLLU
Example:
1. MIB Counter Read (read port 1 “Rx64Octets” counter at indirect address offset 0x0E)
Write to reg. IACR (0xC8) with 0x1C0E (set indirect address and trigger a read MIB counters operation)
Then:
Read reg. IADHR (MIB counter value 31-16)
Read reg. IADLR (MIB counter value 15-0)
Additional MIB Information
In the heaviest condition, the byte counter will overflow in two minutes. It is recommended that the software read all the
counters at least every 30 seconds.
MIB counters are designed as “read clear”. That is, these counters will be cleared after they are read.
March 12, 2015
74
Revision 2.3