mds108 Zarlink Semiconductor, mds108 Datasheet - Page 19

• Manufacturer Part Number: mds108
• Description: Unmanaged 9-port 10/100 Mbps Ethernet Switch
• Manufacturer: Zarlink Semiconductor

12.14
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12.15
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12.16
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Access: parallel interface and I
Address: h0A
Access: parallel interface and I
Address: h0B
Access by parallel interface and I
Address: h0C
Bit 4
Bit 5
Bit 6
Bit 7
TOSDM – TOS Discard Map
AXSC – Transmission Scheduling Control Register
MII_OP0 – MII Register Option 0
Map TOS into frame discard levels (0 = low drop, 1 = high drop).
Bit 0
Bit 1
Bit 2
Bit 3
Bit 4
Bit 5
Bit 6
Bit 7
Bits [3:0]
Bit [5]
Bit [6]
Bit [7]
Permits a non-standard address for the Phy Status Register. When low and high Address
bytes are 0, the MDS108 will use the standard address.
Bit [7:0]
EN2
P2
EN3
P3
Frame discard when TOS is 0
Frame discard when TOS is 1
Frame discard when TOS is 2
Frame discard when TOS is 3
Frame discard when TOS is 4
Frame discard when TOS is 5
Frame discard when TOS is 6
Frame discard when TOS is 7
Transmission Queue Service Weight for high
priority queue
Global Quality of Service Enable
Global Flow Control Disable – if 1, flow control is
disabled globally; if 0, each port’s flow control
settings are separately configurable
Half Duplex Priority Enable – if 0, priority is
disabled for all half duplex ports; if 1, priority is
enabled unless AXSC[5] = 0
Low order address byte
Port 2: Enable; 1 = enabled
Port 2: Priority; 1 = high, 0 = low
Port 3: Enable; 1 = enabled
Port 3: Priority; 1 = high, 0 = low
2
2
C, Read/Write
C, Read/Write
2
C, Read/Write
Zarlink Semiconductor Inc.
MDS108
19
(Default 0)
(Default 0)
(Default 0)
(Default 0)
(Default 0)
(Default 0)
(Default 0)
(Default 0)
(Default 0)
(Default F)
(Default 0)
(Default 0)
(Default 00)
(Default 0)
(Default 0)
(Default 0)
(Default 0)
Data Sheet