LM3S6G11 Datasheet, PDF (692/827 Pages) Texas Instruments – Stellaris® LM3S6G11 Microcontroller

Ethernet Controller
OBSOLETE: TI has discontinued production of this device.
Register 13: Ethernet MAC Number of Packets (MACNP), offset 0x034
This register holds the number of frames that are currently in the RX FIFO. When NPR is 0, there
are no frames in the RX FIFO, and the RXINT bit is clear. When NPR is any other value, at least
one frame is in the RX FIFO, and the RXINT bit in the MACRIS register is set.
Note:
The FCS bytes are not included in the NPR value. As a result, the NPR value could be zero
before the FCS bytes are read from the FIFO. In addition, a new packet could be received
before the NPR value reaches zero. To ensure that the entire packet is received, either use
the DriverLib EthernetPacketGet() API or compare the number of bytes received to the
Length field from the frame to determine when the packet has been completely read.
Ethernet MAC Number of Packets (MACNP)
Base 0x4004.8000
Offset 0x034
Type RO, reset 0x0000.0000
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
NPR
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
Bit/Field
31:6
5:0
Name
reserved
NPR
Type
RO
RO
Reset Description
0x0000.00 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.
0x00
Number of Packets in Receive FIFO
The NPR bits represent the number of packets stored in the RX FIFO.
While the NPR field is greater than 0, the RXINT interrupt in the MACRIS
register is set.
692
July 24, 2012
Texas Instruments-Production Data