MPC5553/MPC5554 Microcontroller Reference Manual, Rev. 5
14-6
Freescale Semiconductor
14.3.2
Detailed Memory Map (Control/Status Registers)
shows the FEC register memory map with each register address, name, and a brief description.
The base address of the FEC registers is 0xFFF4_C000.
NOTE
Some memory locations are not documented. The actual FEC memory map
is from 0xFFF4_C000 - 0xFFF4_C5FF. Also, some bits in otherwise
documented registers are not documented. These memory locations and bits
are not needed for the FEC software driver. They are used mainly by the
FEC subblocks for the FEC operation and happen to be visible through the
slave interface.
Errant writes to these locations can corrupt FEC operation. Because the FEC
is a system bus master, errant writes also can result in the corruption of any
memory mapped location in the system. However, even errant writes to
documented FEC memory locations can cause the same corruption.
-
Table 14-2. FEC Register Memory Map
Address
Offset
(Base +)
Name
Width
1
Description
0x0004
EIR
32
Interrupt Event Register
0x0008
EIMR
32 Interrupt
Mask
Register
0x0010
RDAR
32
Receive Descriptor Active Register
0x0014
TDAR
32
Transmit Descriptor Active Register
0x0024
ECR
32
Ethernet Control Register
0x0040
MMFR
32
MII Management Frame Register
0x0044
MSCR
32
MII Speed Control Register
0x0064
MIBC
32
MIB Control/Status Register
0x0084
RCR
32
Receive Control Register
0x00C4
TCR
32
Transmit Control Register
0x00E4
PALR
32
MAC Address Low Register
0x00E8
PAUR
32
MAC Address Upper Register
+ Type Field
0x00EC
OPD
32
Pause Duration Fields
0x0118
IAUR
32
Upper 32 bits of Individual Hash Table
0x011C
IALR
32
Lower 32 Bits of Individual Hash Table
0x0120
GAUR
32
Upper 32 bits of Group Hash Table
0x0124
GALR
32
Lower 32 bits of Group Hash Table
0x0144
TFWR
32
Transmit FIFO Watermark
0x014C
FRBR
32
FIFO Receive Bound Register
Summary of Contents for MPC5553
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