參數(shù)資料
型號: MDS213
廠商: Zarlink Semiconductor Inc.
英文描述: 12-Port 10/100Mbps + 1Gbps Ethernet Switch
中文描述: 12口10/100Mbps千兆以太網(wǎng)交換機(jī)
文件頁數(shù): 72/120頁
文件大?。?/td> 1678K
代理商: MDS213
MDS213
Data Sheet
72
Zarlink Semiconductor Inc.
18.2.1.5 DCR3 - Interfaces Status Register
Access:
Zero-Wait-State,
Direct Access,
Read only
Address:
h7CC
Bit [3:0]
Reserved
Bit [7:4]
Mem_Stat
Buffer Memory Interface Status
Bit [4]
BB
Buffer Memory Busy, CPU interface is busy accessing Memory
Bit [5]
RE
Read FIFO Empty, the FIFO that CPU interface reads is empty
Bit [6]
WE
Write FIFO Empty, the FIFO that CPU writes is empty
Bit [7]
Res.
Reserved
Bit [11:8]
Que_Stat
Queue Manager Interface Status
Bit [8]
IQ_Rdy
CPU Input Queue is ready for CPU to write into queue
Bit [9]
IQ_Full
CPU Input Queue is full
Bit [11:10]
Reserved
Bit [31:12] Reserved
18.2.1.6 MEMP - Memory Packed Register
Access:
Non-Zero-Wait-State,
Direct Access,
Write/Read
Address:
h7DC
Bit [7:0]
RCL
Read Cycle Limit (Unit is system Clock).
Threshold of reads cycle time.
Default=16
Bit [15:8]
WCL
Write Cycle Limit (Unit is system Clock).
Threshold of writes cycle time.
Default=16
Bit [16]
NP
Not Packed
NP=0 Enable the feature of memory read/write
packed.
Default=0
NP=1 Disable, memory
access will be a pure
round-robin scheme.
Bit [31:17]
Reserved
31
4 3 2 1 0
12 11
Que_Stat
25 24
21 20
16 15
8 7
Mem_Stat
31 - 30
5
WCL
17 16 15
8 7
RCL
0
NP
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