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参数资料
型号： ZL50418GKG2
厂商： ZARLINK SEMICONDUCTOR INC
元件分类： 网络接口
英文描述： DATACOM, LAN SWITCHING CIRCUIT, PBGA553
封装： 37.50 X 37.50 MM, 2.33 MM HEIGHT, LEAD FREE, MS-034, HSBGA-553
文件页数： 18/155页
文件大小： 1928K
代理商： ZL50418GKG2
ZL50418
Data Sheet
114
Zarlink Semiconductor Inc.
12.3.6.23
C7RS – Class 7 Reserve Size
I2C Address h0C0; CPU Address 516
Accessed by CPU, serial interface and I2C (R/W)
Buffer reservation for class 7 (highest priority). Granularity 1. (Default 0)
12.3.6.24
QOSC00~02 - Classes Byte Limit Set 0
Accessed by CPU; serial interface and I2C (R/W):
C — QOSC00 – BYTE_C01 (I2C Address h0C1, CPU Address 517)
B — QOSC01 – BYTE_C02 (I2C Address h0C2, CPU Address 518)
A — QOSC02 – BYTE_C03 (I2C Address h0C3, CPU Address 519)
QOSC00 through QOSC02 represents one set of values A-C for a 10/100 port when using the Weighted Random
Early Drop (WRED) Scheme described in Chapter 7. There are four such sets of values A-C specified in Classes
Byte Limit Set 0, 1, 2, and 3. For CPU port A-C values are defined using register CPUQOSC1, 2 and 3.
Each 10/ 100 port can choose one of the four Byte Limit Sets as specified by the QoS Select field located in bits 5
to 4 of the ECR2n register. The values A-C are per-queue byte thresholds for random early drop. QOSC02
represents A, and QOSC00 represents C.
Granularity when Delay bound is used: QOSC02: 128 bytes, QOSC01: 256 bytes, QOSC00: 512 bytes. Granularity
when WFQ is used: QOSC02: 512 bytes, QOSC01: 512 bytes, QOSC00: 512 bytes.
12.3.6.25
QOSC03~05 - Classes Byte Limit Set 1
Accessed by CPU, serial interface and I2C (R/W):
C - QOSC03 – BYTE_C11 (I2C Address h0C4, CPU Address 51a)
B - QOSC04 – BYTE_C12 (I2C Address h0C5, CPU Address 51b)
A - QOSC05 – BYTE_C13 (I2C Address h0C6, CPU Address 51c)
QOSC03 through QOSC05 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: QOSC05: 128 bytes, QOSC04: 256 bytes, QOSC03: 512 bytes. Granularity
when WFQ is used: QOSC05: 512 bytes, QOSC04: 512 bytes, QOSC03: 512 bytes.
12.3.6.26
QOSC06~08 - Classes Byte Limit Set 2
Accessed by CPU and serial interface (R/W):
C - QOSC06 – BYTE_C21 (CPU Address 51d)
B - QOSC07 – BYTE_C22 (CPU Address 51e)
A - QOSC08 – BYTE_C23 (CPU Address 51f)
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
70
Class 7 FCB Reservation
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