zl50416 Zarlink Semiconductor, zl50416 Datasheet - Page 73

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

13.8.2
I
Accessed by CPU, serial interface and I
Bit [7:0]: High byte of the MAC address aging timer.
The default setting provide 300 seconds aging time. Aging time is based on the following equation:
{AGETIME_TIME,AGETIME_LOW} X (# of MAC entries in the memory X100µsec). Number of MAC entries = 32K
when 1 MB is used. Number of entries = 64K when 2 MB is used.
13.8.3
CPU Address h402
Accessed by CPU (R/W)
Bit [7:0] (Default FF) V_AGETIME X 256 X 100msec is the age time for the VLAN. This timer is for controlling how
long a port is associated to a particular VLAN. It can use dynamic shrinking of a VLAN domain if no packet arrives
for the VLAN. The ZL50416 does not remove the port from the VLAN domain. It sends an Age VLAN Port Control
Command to the CPU. The CPU has to remove the port.
13.8.4
CPU Address:h403
Accessed by CPU (R/W)
Note: ECR2[2] enable/disable learning for each port.
2
C Address h0A9; CPU Address h401
AGETIME_HIGH –MAC address aging time High
V_AGETIME – VLAN to Port aging time
SE_OPMODE – Search Engine Operation Mode
Bit [0]:
Bit [1]:
Bit [2]:
Bit [3]:
7
SL
6
DMS
Report control
Delete Control
5
ARP
- 1 – Enable fast learning mode. In this mode, the hardware learns all the new
- 0 – Search Engine learns a new MAC address and sends a message to the
- 1 – Disable report new VLAN port association(Default 0)
- 0 – Report new VLAN port association
- 1 – Disable report MAC address deletion (Default 0)
- 0 – Report MAC address deletion (MAC address is deleted from MCT after
- 1 – Disable aging logic from removing MAC during aging (Default 0)
- 0 – MAC address entry is removed when it is old enough to be aged.
MAC addresses at highest rate, and reports to the CPU while the hardware
scans the MAC database. When the CPU report queue is full, the MAC
address is learned and marked as “Not reported”. When the hardware scans
the database and finds a MAC address marked as “Not Reported” it tries to
report it to the CPU. The scan rate must be set. SCAN Control register sets
the scan rate. (Default 0)
CPU report queue. If queue is full, the learning is temporarily halted.
aging time)
However, a report is still sent to the CPU in both cases, when bit[2] = 0
4
DRA
2
C (R/W)
3
DA
Zarlink Semiconductor Inc.
2
DRD
ZL50416
73
1
DRN
0
FL
Data Sheet