MDS213 Datasheet, PDF (78/120 Pages) Zarlink Semiconductor Inc – 12-Port 10/100Mbps + 1Gbps Ethernet Switch

MDS213
Data Sheet
18.2.3.8 Reserve Register 1
Access Non-Zero-Wait-State Direct-Access Write/Read
Address: h7B8
31
0x0001
16 15
0x0008
43210
Must be set to "0X00010008"
18.2.3.9 Reserve Register 2
Access Non-Zero-Wait-State
Address: h7BC
31
25
0x0001
Direct-Access
16 15
Write/Read
0x0000
3210
Must be set to "0X00010000"
18.2.4 Frame Control Buffers Management Register
18.2.4.1 FCBSL - FCB Queue
Access: Non-Zero-Wait-State,
Direct Access, Write/Read
Address: h740
31
18 17
11 10
0
Aging Timer Base
Max # of FCB Buffer
Bit [10:0]
Defines Max # of FCB Buffers
Size Range: 1 entry, to 1024 entries
Bit [17:11]
Aging Timer Base
Defines the time interval between scanning of FCB Buffers for aged
buffers
Aging Time = (Number of valid FCB Buffers* Aging Timer Base) msec
18.2.4.2 FCBST - FCB QUEUE - Buffer Low Threshold
Access: Non-Zero-Wait-State,
Direct Access, Write/Read
Address: h744
31
65
0
BLowTH
Bit [5:0]
Buf_Low_Th
Bit [31:6] Reserved
Buffer Low Threshold - The number of frame control buffer handles left
in the Queue to be considered as running low and trigger the interrupt
to the CPU.
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