LM3S8962 Datasheet, PDF (464/620 Pages) List of Unclassifed Manufacturers – Microcontroller

Ethernet Controller
Register 4: Ethernet MAC Receive Control (MACRCTL), offset 0x008
This register enables software to configure the receive module and control the types of frames that
are received from the physical medium. It is important to note that when the receive module is
enabled, all valid frames with a broadcast address of FF-FF-FF-FF-FF-FF in the Destination Address
field will be received and stored in the RX FIFO, even if the AMUL bit is not set.
Ethernet MAC Receive Control (MACRCTL)
Base 0x4004.8000
Offset 0x008
Type R/W, reset 0x0000.0008
31
30
29
28
27
26
25
24
23
22
21
20
19
18
17
16
reserved
Type RO
RO
RO
RO
RO
RO
RO
RO
RO
RO
RO
RO
RO
RO
RO
RO
Reset
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
reserved
RSTFIFO BADCRC PRMS AMUL RXEN
Type RO
RO
RO
RO
RO
RO
RO
RO
RO
RO
RO
R/W
R/W
R/W
R/W
R/W
Reset
0
0
0
0
0
0
0
0
0
0
0
0
1
0
0
0
Bit/Field
31:5
4
3
2
1
0
Name
reserved
RSTFIFO
BADCRC
PRMS
AMUL
RXEN
Type
RO
R/W
R/W
R/W
R/W
R/W
Reset
0x0
0x0
0x1
0x0
0x0
0x0
Description
Software should not rely on the value of a reserved bit. To provide
compatibility with future products, the value of a reserved bit should be
preserved across a read-modify-write operation.
Clear Receive FIFO
When set, clears the receive FIFO. This should be done when software
initialization is performed.
It is recommended that the receiver be disabled (RXEN = 0), and then
the reset initiated (RSTFIFO = 1). This sequence will flush and reset the
RX FIFO.
Enable Reject Bad CRC
The BADCRC bit enables the rejection of frames with an incorrectly
calculated CRC.
Enable Promiscuous Mode
The PRMS bit enables Promiscuous mode, which accepts all valid frames,
regardless of the Destination Address.
Enable Multicast Frames
The AMUL bit enables the reception of multicast frames from the physical
medium.
Enable Receiver
The RXEN bit enables the Ethernet receiver. When this bit is Low, the
receiver is disabled and all frames on the physical medium are ignored.
464
September 02, 2007
Preliminary