zl50416 Zarlink Semiconductor, zl50416 Datasheet - Page 83

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

13.9.25
Accessed by CPU and serial interface (R/W):
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QOSC06 through QOSC08 represents one set of values A-C for a 10/100 port when using the Weighted Random
Early Drop (WRED) scheme.
Granularity when Delay bound is used: QOSC08: 128 bytes, QOSC07: 256 bytes, QOSC06: 512 bytes.
Granularity when WFQ is used: QOSC08: 512 bytes, QOSC07: 512 bytes, QOSC06: 512 bytes
13.9.26
Accessed by CPU and serial interface (R/W):
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QOSC09 through QOSC011 represents one set of values A-C for a 10/100 port when using the Weighted Random
Early Drop (WRED) scheme.
Granularity when Delay bound is used: QOSC11: 128 bytes, QOSC10: 256 bytes, QOSC09: 512 bytes.
Granularity when WFQ is used: QOSC11: 512 bytes, QOSC10: 512 bytes, QOSC09: 512 bytes
13.9.27
Accessed by CPU and serial interface
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QOSC24 through QOSC27 represents one set of WFQ parameters for a 10/100 port. There are four such sets of
values. The granularity of the numbers is 1, and their sum must be 64. QOSC27 corresponds to W0, and QOSC24
corresponds to W3.
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Both flow control allow and flow control best effort only can take effect only the priority type is WFQ.
13.9.28
Accessed by CPU and serial interface
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C - QOSC06 – BYTE_C21 (CPU Address 51d)
B - QOSC07 – BYTE_C22 (CPU Address 51e)
A - QOSC08 – BYTE_C23 (CPU Address 51f)
C - QOSC09 – BYTE_C31 (CPU Address 520)
B - QOSC10 – BYTE_C32 (CPU Address 521)
A - QOSC11 – BYTE_C33 (CPU Address 522)
W3 - QOSC24[5:0] – CREDIT_C00 (CPU Address 52f)
W2 - QOSC25[5:0] – CREDIT_C01 (CPU Address 530)
W1 - QOSC26[5:0] – CREDIT_C02 (CPU Address 531)
W0 - QOSC27[5:0] – CREDIT_C03 (CPU Address 532)
QOSC24[7:6]: Priority service type for the ports select this parameter set. Option 1 to option 4.
QOSC25[7]: Priority service allow flow control for the ports select this parameter set.
QOSC25[6]: Flow control pause best effort traffic only
W3 - QOSC28[5:0] – CREDIT_C10 (CPU Address 533)
W2 - QOSC29[5:0] – CREDIT_C11 (CPU Address 534)
W1 - QOSC30[5:0] – CREDIT_C12 (CPU Address 535)
W0 - QOSC31[5:0] – CREDIT_C13 (CPU Address 536)
Classes Byte Limit Set 2
Classes Byte Limit Set 3
Classes WFQ Credit Set 0
Classes WFQ Credit Set 1
Zarlink Semiconductor Inc.
ZL50416
83
Data Sheet