ZL50408GDC ZARLINK [Zarlink Semiconductor Inc], ZL50408GDC Datasheet - Page 69
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ZL50408GDC
Manufacturer Part Number
ZL50408GDC
Description
Managed 8-Port 10/100M 1-Port 10/100/1000M Ethernet Switch
Manufacturer
ZARLINK [Zarlink Semiconductor Inc]
Datasheet
1.ZL50408GDC.pdf
(132 pages)
- Current page: 69 of 132
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13.3.1.4
I²C Address: 01E+n; CPU Address:0081+2n (n = port number)
Accessed by CPU and I²C (R/W)
Port 0 – 7: (RMAC Ports)
ECR4Pn: Port n Control Register
Bit [7]
Bit [0]:
Bit [1]:
Bit [2]:
Bit [4:3]:
Bit [5]:
Bit [6]:
Bit [7]:
Link Heart Beat Transmit (RMAC ports only)
0: Disable (Default)
1: Enable
Enable TXCLK output. Active high
0: Disable (Default)
1: Mn_TXCLK pin becomes output in GPSI or MII mode
Enable RXCLK output. Active high
0: Disable (Default)
1: Mn_RXCLK pin becomes output in GPSI or MII mode
0: Disable (Default)
1: Enable
In this mode, the packet is looped back in the MAC layer before going out of the
chip. You must force linkup at full duplex as well.
External loopback is another level of system diagnostic which involves the PHY
device to loopback the packet.
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
0: Normal operation (Default)
1: Reset. Not self clearing.
Internal loopback.
Interface mode:
Soft reset.
00 - GPSI mode
01 - MII mode
10 - Reserved
11 - RMII mode (Default)
Zarlink Semiconductor Inc.
ZL50408
69
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