Ethernet Subsystem Registers
14.5.2.10 RX_BUFFER_OFFSET Register (offset = 28h) [reset = 0h]
RX_BUFFER_OFFSET is shown in
and described in
CPDMA_REGS RECEIVE BUFFER OFFSET
Figure 14-38. RX_BUFFER_OFFSET Register
31
30
29
28
27
26
25
24
Reserved
R-0h
23
22
21
20
19
18
17
16
Reserved
R-0h
15
14
13
12
11
10
9
8
RX_BUFFER_OFFSET
R/W-0h
7
6
5
4
3
2
1
0
RX_BUFFER_OFFSET
R/W-0h
LEGEND: R/W = Read/Write; R = Read only; W1toCl = Write 1 to clear bit; -n = value after reset
Table 14-49. RX_BUFFER_OFFSET Register Field Descriptions
Bit
Field
Type
Reset
Description
31-16
Reserved
R
0h
15-0
RX_BUFFER_OFFSET
R/W
0h
Receive Buffer Offset Value - The rx_buffer_offset will be written by
the port into each frame SOP buffer descriptor buffer_offset field.
The frame data will begin after the rx_buffer_offset value of bytes.
A value of 0x0000 indicates that there are no unused bytes at the
beginning of the data and that valid data begins on the first byte of
the buffer.
A value of 0x000F (decimal 15) indicates that the first 15 bytes of the
buffer are to be ignored by the port and that valid buffer data starts
on byte 16 of the buffer.
This value is used for all channels.
1269
SPRUH73H – October 2011 – Revised April 2013
Ethernet Subsystem
Copyright © 2011–2013, Texas Instruments Incorporated