zl50415 Zarlink Semiconductor, zl50415 Datasheet - Page 93

• Manufacturer Part Number: zl50415
• Description: Managed 16-port 10/100 M + 2-port 1 G Ethernet Switch
• Manufacturer: Zarlink Semiconductor

Granularity when Delay bound is used: QOSC17 and QOSC16: 256 bytes, QOSC15 and QOSC14: 512 bytes,
QOSC13 and QOSC12: 1024 bytes.
Granularity when WFQ is used: QOSC17 to QOSC12: 1024 bytes
14.9.29
Accessed by CPU, serial interface and I
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QOSC12 through QOSC17 represent the values A-F for Gigabit port 2. They are per-queue byte thresholds for
random early drop. QOSC17 represents A, and QOSC12 represents F.
Granularity when Delay bound is used: QOSC17 and QOSC16: 256 bytes, QOSC15 and QOSC14: 512 bytes,
QOSC13 and QOSC12: 1024 bytes.
Granularity when WFQ is used: QOSC17 to QOSC12: 1024 bytes
14.9.30
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 W3 and QOSC24
corresponds to W0.
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
Both flow control allow and flow control best effort only can take effect only the priority type is WFQ.
14.9.31
Accessed by CPU and serial interface
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QOSC28 through QOSC31 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. QOSC31 corresponds to W3 and QOSC28
corresponds to W0.
F - QOSC18 – BYTE_C2_G2 (I
E - QOSC19 – BYTE_C3_G2 (I
D - QOSC20 – BYTE_C4_G2 (I
C - QOSC21 – BYTE_C5_G2 (I
B - QOSC22 – BYTE_C6_G2 (I
A - QOSC23 – BYTE_C7_G2 (I
W0 - QOSC24[5:0] – CREDIT_C00 (CPU Address 52f)
W1 - QOSC25[5:0] – CREDIT_C01 (CPU Address 530)
W2 - QOSC26[5:0] – CREDIT_C02 (CPU Address 531)
W3 - QOSC27[5:0] – CREDIT_C03 (CPU Address 532)
W0 - QOSC28[5:0] – CREDIT_C10 (CPU Address 533)
W1 - QOSC29[5:0] – CREDIT_C11 (CPU Address 534)
W2 - QOSC30[5:0] – CREDIT_C12 (CPU Address 535)
W3 - QOSC31[5:0] – CREDIT_C13 (CPU Address 536)
Classes Byte Limit Giga Port 2
Classes WFQ Credit Set 0
Classes WFQ Credit Set 1
2
2
2
2
2
2
C Address h0CD, CPU Address 529)
C Address h0CE, CPU Address 52a)
C Address h0CF, CPU Address 52b)
C Address h0D0, CPU Address 52c)
C Address h0D1, CPU Address 52d)
C Address h0D2, CPU Address 52e)
2
C (R/W)
Zarlink Semiconductor Inc.
ZL50418
93
Data Sheet