Fast Ethernet Controller (FEC)
MCF52235 ColdFire® Integrated Microcontroller Reference Manual, Rev. 6
Freescale Semiconductor
18-19
18.5.3
MIB Block Counters Memory Map
defines the MIB Counters memory map which defines the locations in the MIB RAM space
where hardware maintained counters reside. These fall in the 0x1200-0x13FF address offset range. The
counters are divided into two groups.
RMON counters are included which cover the Ethernet Statistics counters defined in RFC 1757. In
addition to the counters defined in the Ethernet Statistics group, a counter is included to count truncated
frames as the FEC only supports frame lengths up to 2047 bytes. The RMON counters are implemented
independently for transmit and receive to ensure accurate network statistics when operating in full duplex
mode.
Table 18-10. FEC Register Memory Map
IPSBAR
Offset
Name
Width
Description
0x1004
EIR
32
Interrupt Event Register
0x1008
EIMR
32
Interrupt Mask Register
0x1010
RDAR
32
Receive Descriptor Active Register
0x1014
TDAR
32
Transmit Descriptor Active Register
0x1024
ECR
32
Ethernet Control Register
0x1040
MDATA
32
MII Data Register
0x1044
MSCR
32
MII Speed Control Register
0x1064
MIBC
32
MIB Control/Status Register
0x1084
RCR
32
Receive Control Register
0x10C4
TCR
32
Transmit Control Register
0x10E4
PALR
32
Physical Address Low Register
0x10E8
PAUR
32
Physical Address High+ Type Field
0x10EC
OPD
32
Pause Duration
0x1118
IAUR
32
Upper 32 bits of Individual Hash Table
0x111C
IALR
32
Lower 32 Bits of Individual Hash
Table
0x1120
GAUR
32
Upper 32 bits of Group Hash Table
0x1124
GALR
32
Lower 32 bits of Group Hash Table
0x1144
TFWR
32
Transmit FIFO Watermark
0x114C
FRBR
32
FIFO Receive Bound Register
0x1150
FRSR
32
FIFO Receive FIFO Start Registers
0x1180
ERDSR
32
Pointer to Receive Descriptor Ring
0x1184
ETDSR
32
Pointer to Transmit Descriptor Ring
0x1188
EMRBR
32
Maximum Receive Buffer Size
Because
of
an
order
from
the
United
States
International
Trade
Commission,
BGA-packaged
product
lines
and
part
numbers
indicated
here
currently
are
not
available
from
Freescale
for
import
or
sale
in
the
United
States
prior
to
September
2010:MCF52234CVM60,
MCF52235CVM60
