參數資料
型號: MDS213CG
廠商: ZARLINK SEMICONDUCTOR INC
元件分類: 網絡接口
英文描述: 12-Port 10/100Mbps + 1Gbps Ethernet Switch
中文描述: DATACOM, LAN SWITCHING CIRCUIT, PBGA456
封裝: 35 X 35 MM, 2.33 MM HEIGHT, MS-034, HSBGA-456
文件頁數: 99/120頁
文件大?。?/td> 1678K
代理商: MDS213CG
MDS213
Data Sheet
99
Zarlink Semiconductor Inc.
Type = BMCT (12bits)
Bit [11:0]
BM
Buffer Management control FIFO Output
BM stores free FCB handles. (FCB handle=0 cannot be used.)
Bit [31:12] Reserved
Type = FCB (56 bits)
Bit [55:0]
FCB
Frame Control Block.
Refer to Chapter 9 for detailed data structure.
Type = QCNT (79 bits)
Bit [2:0]
Que_S [2:0]
Queue size
000=128 entries 001=128*2 entries
111=128*8=1K entries
Each entry contains 4 bytes
Bit [14:3]
Base [11:0]
Base pointer to its Transmission Queue
Bit [25:15] ECnt [10:0]
Entry Count: Total entries in its queue.
Bit [35:26] WrPt [9:0]
Write Pointer
Address_Write_Entry[20:9]=Base[11:0]+WrPt[9:7]
Address_Write_Entry[9:3]= WrPt[6:0]
Address_Write_Entry[2:0]= 0
(The address [2:0] is always equal to 0.)
Bit [45:36] RdPt [9:0]
Read Pointer
Address_Read_Entry[20:9]=Base[11:0]+RdPt[9:7]
Address_Read_Entry[9:3]= RdPt[6:0]
Address_Read_Entry[2:0]= 0 (The address [2:0] is always equal to 0.)
Bit[46]
CV
Cache Valid
CV=1, Cache of Queue Entry QE[31:0] is valid.
Bit[78:47]
QE[31:0]
Cache a queue entry
31
BM[11:0]
12 11
CPUIRDAT0
0
31
0
FCB_DATA[31:0]
24 23
FCB_DATA[55:32]
CPUIRDAT0
CPUIRDAT1
31
0
Base[11:0]
15 14 13
WrPt[5:0]
CPUIRDAT0
CPUIRDAT1
QS[2:0]
WrPT[9:6]
RdPt[9:0]
Cache Queue Entry[31:17]
ECnt[10:0]
CV
Cache Queue Entry[16:0]
4 3 2
CPUIRDAT2
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