zl50416 Zarlink Semiconductor, zl50416 Datasheet - Page 55

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

13.3.2
I
Accessed by CPU and serial interface (R/W)
2
C Address: 01B-033; CPU Address:0001+2xN (N = port number)
Bit [0]
Bit [1]
Bit [2]
Bit [4:3]
Bit [5]
Bit [7:6]
ECR2Pn: Port N Control Register
7
Security En
•
•
•
•
•
•
•
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SS - Spanning tree state (802.1D spanning tree protocol) Default is 11.
00 – Blocking:
01 - Listening:
10 - Learning:
11 - Forwarding: Frame is forwarded. Source MAC address is learned.
6
When Flow Control On:
In half duplex mode, the MAC transmitter applies back pressure for flow control.
In full duplex mode, the MAC transmitter sends Flow Control frames when
necessary. The MAC receiver interprets and processes incoming flow control
frames. The Flow Control Frame Received counter is incremented whenever a
flow control is received.
When Flow Control off:
In half duplex mode, the MAC Transmitter does not assert flow control by
sending flow control frames or jamming collision.
In full duplex mode, the Mac transmitter does not send flow control frames. The
MAC receiver does not interpret or process the flow control frames. The Flow
Control Frame Received counter is not incremented.
Asymmetric Flow Control Enable.
When this bit is set, and flow control is on (bit[0] = 0), don’t send out a flow
control frame. But MAC receiver interprets and processes flow control frames.
- 1 - Flow Control Off
- 0 - Flow Control On
- 1 - Half Duplex - Only in 10/100 mode
- 0 - Full Duplex
- 1 - 10Mbps
- 0 - 100Mbps
- 00 – Automatic Enable Auto Neg. - This enables hardware state machine for
- 01 - Limited Disable auto Neg. This disables hardware for speed auto-negotiation.
- 10 - Link Down. Force link down (disable the port).
- 11 - Link Up. The configuration in ECR1[2:0] is used for (speed/half duplex/full
- 0 – Disable asymmetric flow control
- 01 – Enable Asymmetric flow control
auto-negotiation.
Hardware Poll MII for link status.
duplex/flow control) setup.
5
QoS Sel
Frame is dropped
4
Frame is dropped
Frame is dropped. Source MAC address is learned.
Reserve
Zarlink Semiconductor Inc.
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ZL50416
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2
DisL
1
Ftf
0
Futf
Data Sheet