MDS213 Datasheet, PDF (79/120 Pages) Zarlink Semiconductor Inc – 12-Port 10/100Mbps + 1Gbps Ethernet Switch

MDS213
18.2.4.3 BCT - (FCB) Buffer Counter Threshold
Access Non-Zero-Wait-State
Direct-Access Write/Read
Address: h74C
31
19
10 9
Hi Limit
Low Limit
Data Sheet
0
Bit[9:0]
Low_Limit
Bit[19:10] HI_Limit
Low limit number of frames to each destination port (i.e., Source port
limits the # of FCB used by each destination port)
High limit number of frames to each destination port (i.e., Source port
limits the # of FCB used by each destination port)
18.2.4.4 BCHL - Buffer Counter Hi-low Selection
Access Non-Zero-Wait-State
Direct-Access Write/Read
Address: h750
31
25
13 12
0
Rp_Hi_Low Sel
Lp_Hi_Low Sel
Bit[12:0]
Lp_Hi_Low Sel
Bit[25:13] Rp_Hi_Low Sel
Selection for Low or High Limit of Buffer Counter for Local device
13 bits maps to 13 ports in Local Device
1 = select hi limit
0 = select low limit
Selection for Low or High Limit of Buffer Counter for Remote device
13 bits maps to 13 ports in Remote Device
1 = select hi limit
0 = select low limit
18.2.5 Queue Management Register
18.2.5.1 CINQ - CPU Input Queue
Access: Non-Zero-Wait-State,
Direct Access, Write only
Address: h708
31
0
32-bit data from CPU input queue
Note: Check IQ_RDY=1 in DCR3 (Interface Status Register) before writing into CPU Input Queue
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Zarlink Semiconductor Inc.