Ethernet Subsystem Registers
14.5.2.49 RX7_FREEBUFFER Register (offset = FCh) [reset = 0h]
RX7_FREEBUFFER is shown in
and described in
CPDMA_INT RECEIVE FREE BUFFER REGISTER CHANNEL 7
Figure 14-77. RX7_FREEBUFFER 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_FREEBUFFER
W-0h
7
6
5
4
3
2
1
0
RX_FREEBUFFER
W-0h
LEGEND: R/W = Read/Write; R = Read only; W1toCl = Write 1 to clear bit; -n = value after reset
Table 14-88. RX7_FREEBUFFER Register Field Descriptions
Bit
Field
Type
Reset
Description
31-16
Reserved
R
0h
15-0
RX_FREEBUFFER
W
0h
Rx Free Buffer Count - This field contains the count of free buffers
available.
The rx_pendthresh value is compared with this field to determine if
the receive threshold pending interrupt should be asseted (if
enabled).
This is a write to increment field.
This field rolls over to zero on overflow.
If receive threshold pending interrupts are used, the host must
initialize this field to the number of available buffers (one register per
channel).
The port decrements (by the number of buffers in the received
frame) the associated channel register for each received frame.
This is a write to increment field.
The host must write this field with the number of buffers that have
been freed due to host processing.
14.5.3 CPSW_CPTS Registers
lists the memory-mapped registers for the CPSW_CPTS. All register offset addresses not
listed in
should be considered as reserved locations and the register contents should not be
modified.
Table 14-89. CPSW_CPTS REGISTERS
Offset
Acronym
Register Name
Section
0h
CPTS_IDVER
IDENTIFICATION AND VERSION REGISTER
4h
CPTS_CONTROL
TIME SYNC CONTROL REGISTER
Ch
CPTS_TS_PUSH
TIME STAMP EVENT PUSH REGISTER
10h
CPTS_TS_LOAD_VAL
TIME STAMP LOAD VALUE REGISTER
14h
CPTS_TS_LOAD_EN
TIME STAMP LOAD ENABLE REGISTER
20h
CPTS_INTSTAT_RAW
TIME SYNC INTERRUPT STATUS RAW REGISTER
24h
CPTS_INTSTAT_MASKED
TIME SYNC INTERRUPT STATUS MASKED
REGISTER
28h
CPTS_INT_ENABLE
TIME SYNC INTERRUPT ENABLE REGISTER
1308Ethernet Subsystem
SPRUH73H – October 2011 – Revised April 2013
Copyright © 2011–2013, Texas Instruments Incorporated