IP113M LF
Preliminary Data Sheet
43/58
April 9, 2007
Copyright © 2004, IC Plus Corp.
IP113M LF-DS-R11
Extended MII registers and EEPROM registers 19
MII
ROM
NAME
R/W
DESCRIPTION
DEFAULT
Statistic counter registers (MII register 19D)
Statistic Counter [11:0]
The statistic counter maintains some kinds of
statistic information. Before reading the
statistic counter, user has to select one
counter by writing MII register 19[14:12]
cnt_index[2:0]. The relationship between
cnt_index and its corresponding counter is
shown in the following table.
Cnt_index Content of statistic counter[11:0]
3'b000
Received packet count on TP port
3'b001
Received CRC error count on TP
port
3'b010
Drop packet count on TP port
3'b011
Collision event count on TP port
3'b100
Received packet count on fiber port
3'b101
Received CRC error count on fiber
port
3'b110
Drop packet count on fibe port
19[11:0]
--
mg_statistic_cnt[11:0]
RO
3'b111
Collision event count on fiber port
0
19[14:12]
--
cnt_index[2:0]
RW
The current counter index
A counter index to select one counter before
reading MII register 19[11:0]
0
19.15
--
cnt_loop_en
RW
The counter index loop enable
1: MII register 19[14:12] cnt_index[2:0] is
increased by one automatically whenever
the MII register 19 is read. Cnt_index[2:0] is
turned arounf to “000” when it reaches to
“111” and is read.
0: cnt_index[2:0] is not increased when MII
register 19 is read.
1
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