lan9303m Standard Microsystems Corp., lan9303m Datasheet - Page 358

• Manufacturer Part Number: lan9303m
• Description: Small Form Factor Three Port 10/100 Managed Ethernet Switch With Dual Mii/rmii/turbo Mii
• Manufacturer: Standard Microsystems Corp.

Revision 1.3 (08-27-09)
13.4.4.27
31:14
13:10
BITS
9:8
7
RESERVED
Drop Reason B
When the Status B Pending bit is set, these bits indicate the reason a packet
was dropped per the table below:
Source Port B
When the Status B Pending bit is set, these bits indicate the source port on
which the packet was dropped.
00 = Port 0
01 = Port 1
10 = Port 2
11 = RESERVED
Status B Pending
When set, bits 13:8 are valid.
VALUES
Buffer Manager Interrupt Pending Register (BM_IPR)
This register contains the Buffer Manager interrupt status. The status is double buffered. All interrupts
in this register may be masked via the
Refer to
0000
0001
0010
0011
0100
0101
0110
0111
1000
1001
1010
1011
1100
1101
1110
1111
BIT
Register #:
Chapter 5, "System Interrupts," on page 62
The destination address was not in the ALR table (unknown or broadcast), and
the Broadcast Buffer Level was exceeded.
Drop on Red was set and the packet was colored Red.
There were no buffers available.
There were no memory descriptors available.
The destination address was not in the ALR table (unknown or broadcast) and
there were no valid destination ports.
The packet had a receive error and was >64 bytes.
The Buffer Drop Level was exceeded.
RESERVED
RESERVED
Drop on Yellow was set, the packet was colored Yellow and was randomly
selected to be dropped.
RESERVED
RESERVED
RESERVED
RESERVED
RESERVED
RESERVED
1C21h
DESCRIPTION
Small Form Factor Three Port 10/100 Managed Ethernet Switch with Dual MII/RMII/Turbo MII
DESCRIPTION
DATASHEET
Buffer Manager Interrupt Mask Register (BM_IMR)
358
Size:
for more information.
32 bits
SMSC LAN9303M/LAN9303Mi
TYPE
RO
RC
RC
RC
DEFAULT
00b
Datasheet
0h
0b
-
register.