zl50416 Zarlink Semiconductor, zl50416 Datasheet - Page 74

• Manufacturer Part Number: zl50416
• Description: Managed 16-port 10/100 M + 2-port 1 G Ethernet Switch
• Manufacturer: Zarlink Semiconductor

13.8.5
CPU Address h404
Accessed by CPU (R/W)
SCAN is used when fast learning is enabled (SE_OPMODE bit 0). It is used for setting up the report rate for newly
learned MAC addresses to the CPU.
Examples:
R= 0, Ratio = 0: All rounds are used for aging. Never scan for new MAC addresses.
R= 0, Ratio = 1: Aging and scanning in every other aging round
R= 1, Ratio = 7: In eight rounds, one is used for scanning and seven are used for aging
R= 0, Ratio = 7: In eight rounds, one is used for aging and seven are used for scanning
SCAN – SCAN Control Register (default 00)
Bit [4]:
Bit [5]:
Bit [6]:
Bit [7]:
Bit [6:0]:
Bit [7]:
7
R
6
Ratio
Disable MCT speedup aging (Default 0)
Slow Learning (Default 0)
•
•
Ratio between database scanning and aging round (Default 00)
Reverse the ratio between scanning round and aging round (Default 0)
- 1 – Disable report aging VLAN port association (Default 0)
- 0 – Enable Report aging VLAN. VLAN is not removed by hardware. The
- 1 - Report ARP packet to CPU (Default 0)
• 1 – Disable speedup aging when MCT resource is low.
• 0 – Enable speedup aging when MCT resource is low.
• 1– Enable slow learning. Learning is temporary disabled when search
• 0 – Learning is performed independent of search demand
CPU needs to remove the VLAN –port association.
demand is high
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