zl50416 Zarlink Semiconductor, zl50416 Datasheet - Page 84

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

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 W0, and QOSC28
corresponds to W3.
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13.9.29
Accessed by CPU and serial interface
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QOSC35 through QOSC32 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. QOSC35 corresponds to W0, and QOSC32
corresponds to W3.
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•
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13.9.30
Accessed by CPU and serial interface
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QOSC39 through QOSC36 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. QOSC39 corresponds to W0, and QOSC36
corresponds to W3.
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13.9.31
I
Accessed by CPU, Serial Interface and I
2
C Address 0FB, CPU Address 553
QOSC28[7:6]: Priority service type for the ports select this parameter set. Option 1 to option 4.
QOSC29[7]: Priority service allow flow control for the ports select this parameter set.
QOSC29[6]: Flow control pause best effort traffic only
W3 - QOSC32[5:0] – CREDIT_C20 (CPU Address 537)
W2 - QOSC33[5:0] – CREDIT_C21 (CPU Address 538)
W1 - QOSC34[5:0] – CREDIT_C22 (CPU Address 539)
W0 - QOSC35[5:0] – CREDIT_C23 (CPU Address 53a)
QOSC32[7:6]: Priority service type for the ports select this parameter set. Option 1 to option 4.
QOSC33[7]: Priority service allow flow control for the ports select this parameter set.
QOSC33[6]: Flow control pause for best effort traffic only
W3 - QOSC36[5:0] – CREDIT_C30 (CPU Address 53b)
W2 - QOSC37[5:0] – CREDIT_C31 (CPU Address 53c)
W1 - QOSC38[5:0] – CREDIT_C32 (CPU Address 53d)
W0 - QOSC39[5:0] – CREDIT_C33 (CPU Address 53e)
QOSC36[7:6]: Priority service type for the ports select this parameter set. Option 1 to option 4.
QOSC37[7]: Priority service allow flow control for the ports select this parameter set.
QOSC37[6]: Flow control pause best effort traffic only
Bits [7:4]:
Classes WFQ Credit Set 2
Classes WFQ Credit Set 3
RDRC0 – WRED Rate Control 0
7
X Rate
Corresponds to the frame drop percentage X% for WRED. Granularity
6.25%.
4
c
C (R/W)
3
Y Rate
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ZL50416
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Data Sheet