參數(shù)資料
型號: MVTX2802AG
廠商: ZARLINK SEMICONDUCTOR INC
元件分類: 網(wǎng)絡(luò)接口
英文描述: Managed 4-Port 1000 Mbps Ethernet Switch
中文描述: DATACOM, LAN SWITCHING CIRCUIT, PBGA596
封裝: 40 X 40 MM, 2.33 MM HEIGHT, MS-034, HSBGA-596
文件頁數(shù): 75/154頁
文件大?。?/td> 1936K
代理商: MVTX2802AG
MVTX2802
Data Sheet
75
Zarlink Semiconductor Inc.
11.9.1.3 FCR – Flooding Control Register
I
2
C Address h040; CPU Address:h502
Accessed by CPU, serial interface and I
2
C (R/W)
Bit [0]:
QoS frame lost is OK. Priority will be available for flow control enabled source only when this bit
is set
(Default 0)
Bit [4]:
Per VLAN Multicast Flow Control
(Default 0)
0 – Disable
1 - Enable
Bit [5]:
CPU multicast queues size
0 = 16 entries
1 = 160 entries
Bit [6]:
Select TOS bits for Priority
(Default 0)
0 – Use TOS [4:2] bits to map the transmit priority
1 – Use TOS [5:3] bits to map the transmit priority
Bit [7]:
Select TOS bits for Drop
(Default 0)
0 – Use TOS [4:2] bits to map the drop priority
1 – Use TOS [5:3] bits to map the drop priority
7
6
4
3
0
Tos
TimeBase
U2MR
Bit [3:0]:
Bit [6:4]:
Bit [7]:
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. 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 = 4’h8
)
TimeBase: (Default = 000)
000 = 10us
001 = 20us
010 = 40us
011 = 80us
100 = 160us
101 = 320us
110 = 640us
111 = 10us
, same as 000.
Select VLAN tag or TOS field (IP packets) to be preferentially picked to map transmit priority
and drop priority (
Default = 0
).
0 – Select VLAN tag priority field over TOS field
1 – Select TOS field over VLAN tag priority field
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