zl50400 Zarlink Semiconductor, zl50400 Datasheet - Page 85

• Manufacturer Part Number: zl50400
• Description: Lightly Managed/unmanaged 9-port 10/100 M Ethernet Switch
• Manufacturer: Zarlink Semiconductor

12.3.6.18
I²C Address h05B, CPU Address:h542
Accessed by CPU and I²C (R/W)
Map TOS field in IP packet into eight level transmit priorities:
12.3.6.19
I²C Address h05D, CPU Address:h543
Accessed by CPU and I²C (R/W)
Map TOS into frame discard when low priority buffer usage is above threshold
12.3.6.20
I²C Address h0B3+n, CPU Address:h550+n
Accessed by CPU and I²C (R/W)
(Default 00) This register is duplicated eight times from PROTOCOL 0~7 and allows the CPU to define eight
separate protocols.
Bits [1:0]:
Bits [4:2]:
Bits [7:5]:
Bit [0]:
Bit [1]:
Bit [2]:
Bit [3]:
Bit [4]:
Bit [5]:
Bit [6]:
Bit [7]:
Bits [7:0]:
TOSPMH – TOS Priority Map
TOSDML – TOS Discard Map
USER_PROTOCOL_n – User Define Protocol 0~7
Priority when the TOS field is 5 (Default 0)
Priority when the TOS field is 6 (Default 0)
Priority when the TOS field is 7 (Default 0)
Frame drop priority when TOS field is 0 (Default 0)
Frame drop priority when TOS field is 1 (Default 0)
Frame drop priority when TOS field is 2 (Default 0)
Frame drop priority when TOS field is 3 (Default 0)
Frame drop priority when TOS field is 4 (Default 0)
Frame drop priority when TOS field is 5 (Default 0)
Frame drop priority when TOS field is 6 (Default 0)
Frame drop priority when TOS field is 7 (Default 0)
User Define Protocol
Zarlink Semiconductor Inc.
ZL50400
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Data Sheet