參數(shù)資料
型號： ZL50408GDG2
廠商： CONEXANT SYSTEMS
元件分類： 網(wǎng)絡(luò)接口
英文描述： DATACOM, LAN SWITCHING CIRCUIT, PBGA208
封裝： 17 X 17 MM, 1.40 MM HEIGHT, LEAD FREE, MO-192, LBGA-208
文件頁數(shù)： 17/144頁
文件大?。?/td> 1779K
代理商： ZL50408GDG2
ZL50408
Data Sheet
113
Zarlink Semiconductor Inc.
12.3.9
(Group 8 Address) Per Port QOS Control
12.3.9.1
FCRn – Port 0~9 Flooding Control Register
IC Address: h04C+n; CPU Address: h0800+n (n = port number)
Accessed by CPU and IC (R/W)
12.3.9.2
BMRCn - Port 0~9 Broadcast/Multicast Rate Control
IC Address: h05E+n; CPU Address: h0820+n (n = port number)
Accessed by CPU and IC (R/W)
This broadcast and multicast rate defines for Port n, the number of packets allowed to be forwarded within a
specified time. Once the packet rate is reached, packets will be dropped. To turn off the rate limit, program the field
to 0. Time base is based on register FCR0 [6:4]
12.3.9.3
PR100_n – Port 0~7 Reservation
IC Address: h06A+n; CPU Address: h0840+n (n = port number)
Accessed by CPU and IC (R/W)
Expressed in multiples of 16 granules. (Default 0x6)
12.3.9.4
PR100_CPU – Port CPU Reservation
IC Address: h073; CPU Address: h0848
Accessed by CPU and IC (R/W)
Expressed in multiples of 16 granules. (Default 0x6)
Bits [3:0]:
U2MR: Unicast to Multicast Rate. Units in terms of time base defined in bits
[6:4]. This is used to limit the amount of flooding traffic from Port n. The value
in U2MR specifies how many packets are allowed to flood within the time
specified by bit [6:4]. To disable this function, program U2MR to 0.
(Default = 0)
Bits [6:4]:
Time Base for Unicast to Multicast, Multicast and Broadcast rate control of
Port n: (Default = 000)
000 = 100 us
001 = 200 us
010 = 400 us
011 = 800 us
100 = 1.6 ms
101 = 3.2 ms
110 = 6.4 ms
111 = 12.8 ms
Bit [7]:
Reserved
Bits [3:0]:
Multicast Rate Control. Number of multicast packets allowed within the time defined in
bits 6 to 4 of the Flooding Control Register (FCRn). (Default 0).
Bits [7:4]:
Broadcast Rate Control. Number of broadcast packets allowed within the time defined
in bits 6 to 4 of the Flooding Control Register (FCRn). (Default 0)
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