Rainbow Electronics W90P710CDG User Manual
Page 111
W90P710CD/W90P710CDG
Publication Release Date: September 19, 2006
- 111 -
Revision B2
6.5.2.1 Register
Details
CAM Command Register (CAMCMR)
The EMC of W90P710 supports CAM function for destination MAC address recognition. The
CAMCMR control the CAM comparison function, and unicast, multicast, and broadcast packet
reception.
Register
Address
R/W
Description
Reset Value
CAMCMR
0xFFF0_3000
R/W
CAM Command Register
0x0000_0000
31
30
29
28
27
26
25
24
Reserved
23
22
21
20
19
18
17
16
Reserved
15
14
13
12
11
10
9
8
Reserved
7
6
5
4
3
2
1
0
Reserved ECMP
CCAM
ABP
AMP
AUP
BITS
DESCRIPTIONS
[31:5] Reserved
-
[4] ECMP
The ECMP(Enable CAM Compare) controls the enable of CAM
comparison function for destination MAC address recognition.
If S/W wants to receive a packet with specific destination MAC
address, configures the MAC address into anyone of 16 CAM entries,
then enables that CAM entry and set ECMP to 1.
1’b0: Disable CAM comparison function for destination MAC address
recognition.
1’b1: Enable CAM comparison function for destination MAC address
recognition.
[3] CCAM
The CCAM(Complement CAM Compare) controls the complement of
the CAM comparison result. If the ECMP and CCAM are both enabled,
the incoming packet with specific destination MAC address configured
in CAM entry will be dropped. And the incoming packet with
destination MAC address doesn’t configured in any CAM entry will be
received.
1’b0: The CAM comparison result doesn’t be complemented.
1’b1: The CAM comparison result will be complemented.