Instruction Manual

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.