zl50404 Zarlink Semiconductor, zl50404 Datasheet - Page 65
zl50404
Manufacturer Part Number
zl50404
Description
Lightly Managed/unmanaged 5-port 10/100m Ethernet Switch
Manufacturer
Zarlink Semiconductor
Datasheet
1.ZL50404.pdf
(121 pages)
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Port 8: (CPU Port)
Port 9: (MMAC Port)
Bit [5]:
Bit [6]:
Bit [7]:
Bit [1:0]:
Bit [2]:
Bit[4:3]:
Bit [5]:
Bit [6]:
Bit [7]:
Bit [0]:
Bit [1]:
Frame loopback.
0: Disable frame from sending back to its source port. (Default)
1: Allow frame to send back to its source port
In a regular ethernet switch, a packet should never be receive and forwarded to
the same port. Setting the bit allows it to happen.
This is not the same as an ingress MAC loopback. The destination MAC address
has to be stored (learned) in the MCT and associated with the originating source
port. The frame loopback will only work for unicast packets.
Link Heart Beat Receive
0: Disable (Default). Also clears all MAC LHB status.
1: Enable
Soft reset.
0: Normal operation (Default)
1: Reset. Not self clearing.
Reserved
Enable special write to 2 registers in a single write operation.
0: Disable (Default)
1: Enable
Reserved
Frame loopback.
0: Disable frame from sending back to its source port. (Default)
1: Allow frame to send back to its source port
In a regular ethernet switch, a packet should never be receive and forwarded to
the same port. Setting the bit allows it to happen.
This is not the same as an ingress MAC loopback. The destination MAC address
has to be stored (learned) in the MCT and associated with the originating source
port. The frame loopback will only work for unicast packets.
Reserved
Soft reset.
0: Normal operation (Default)
1: Reset. Not self clearing.
Reserved
Enable RXCLK output. Active high
0: Disable (Default)
1: M9_RXCLK pin becomes output in MII mode
Note: To configure port 9 with the device providing the interface clocks, you need
to tie M9_RXCLK to M9_MTXCLK externally as M9_MTXCLK is not a bidirectional
clock.
Zarlink Semiconductor Inc.
ZL50404
65
Data Sheet
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