zl50409 Zarlink Semiconductor, zl50409 Datasheet - Page 22

• Manufacturer Part Number: zl50409
• Description: Managed 9-port 10/100m Ethernet Switch
• Manufacturer: Zarlink Semiconductor

In lightly managed/managed mode, the default configuration can be used as well, however, the device needs to be
told when to start switching. This is done via the “Init Complete” bit, set in GCR[4]. The default settings can be
overridden using the CPU interface, but should be done before setting of GCR[4]. One thing to note is after reset,
the device will start to initialize the control tables. Therefore, a short delay (100us~1ms) is necessary before
changing the register settings and/or control tables, and before setting GCR[4].
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System Defaults
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Per-port Defaults
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Automatic learning enabled
Per-port security disabled
Support frame size 64 <= n <= 1522
Pad transmit frames < 64B
Standard preamble
Strict Priority scheduling
FE Ports
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Uplink Port
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CPU MAC address is 00-00-00-00-00-00
Forward MAC addresses 01-80-C2-00-00-00~FF to CPU port
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All interrupts enabled
MAC address learn report to CPU disabled
Statistics counters disabled
DiffServ EF code support disabled
No VLAN ID hashing
FE Ports
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CPU Port
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RMII mode
Auto-negotiate 100M/Full Duplex/Flow Control
Rate control disabled
per-source port buffer pool of 96 buffers, with flow control threshold of 48 buffers
MII mode
Auto-negotiate 100M/Full Duplex/Flow Control
per-source port buffer pool of 384 buffers, with flow control threshold of 192 buffers
Except 01-80-C2-00-00-01~F, which are dropped
Link heart beat disabled
100M/Full Duplex/Flow Control
8-byte header padding
per-source port buffer pool of 96 buffers, with flow control threshold of 48 buffers
Zarlink Semiconductor Inc.
ZL50409
22
Data Sheet