LAN9311 Datasheet, PDF (182/461 Pages) SMSC Corporation – Two Port 10/100 Managed Ethernet Switch with 16-Bit Non-PCI CPU Interface

Two Port 10/100 Managed Ethernet Switch with 16-Bit Non-PCI CPU Interface
Datasheet
BITS
15
14:13
12:8
7:0
DESCRIPTION
Force RX Discard (RX_DUMP)
When a 1 is written to this bit, the RX Data and Status FIFO’s are cleared
of all pending data and the RX data and status pointers are cleared to zero.
Note:
Please refer to Section 9.9.1.2, "Force Receiver Discard (Receiver
Dump)," on page 135 for a detailed description regarding the use
of RX_DUMP.
RESERVED
RX Data Offset (RXDOFF)
This field controls the offset value, in bytes, that is added to the beginning
of an RX data packet. The start of the valid data will be shifted by the
number of bytes specified in this field. An offset of 0-31 bytes is a valid
number of offset bytes.
Note:
The two LSBs of this field (D[9:8]) must not be modified while the
RX is running. The receiver must be halted, and all data purged
before these two bits can be modified. The upper three bits
(DWORD offset) may be modified while the receiver is running.
Modifications to the upper bits will take affect on the next DWORD
read.
RESERVED
TYPE
WO
SC
RO
R/W
RO
DEFAULT
0b
-
00000b
-
Revision 2.0 (02-14-13)
182
DATASHEET
SMSC LAN9311/LAN9311i