Achronix Speedster22i 10G/40G/100G Ethernet - Manual (Page 29)

UG029, September 6, 2013 29
Fabric FIFO Interface
Overview
The following table shows the segment definition and datapath bit assignments for each
configuration.
Table 13 – Modes of Operation
Configuration Segment ID Datapath Bits Clocks
1-12 x 10G
SEG0 –
SEG11
[63:0] = SEG0
[127:64] = SEG1
[191:128] = SEG2
[255:192] = SEG3
[319:256] = SEG4
[383:320] = SEG5
[447:384] = SEG6
[511:448] = SEG7
[575:512] = SEG8
[639:576] = SEG9
[703:640] = SEG10
[767:704] = SEG11
ff_clk[0] = SEG0-3
ff_clk[1] = SEG4-7
ff_clk[2] = SEG8-11
1 x 100G,
1-2 x 10G
SEG0,
SEG10-11
[511:0] = SEG0
[703:640] = SEG10
[767:704 ] = SEG11
ff_ clk[2:0] = SEG0
ff_ clk[2] = SEG10-11
1-3 x 40G
SEG0, SEG4,
SEG8
[255:0] = SEG0
[ 511:256] = SEG4
[767:512] = SEG8 ff_ clk[0] = SEG0
ff_ clk[1] = SEG4
ff_ clk[2] = SEG8
1-4 x 10G,
1-2 x 40G
SEG0-3,
SEG4, SEG8
[63:0] = SEG0
[127:64] = SEG1
[191:128] = SEG2
[255:192] = SEG3
[511:256] = SEG4
[767:512] = SEG8
ff_ clk[0] = SEG0-3
ff_ clk[1] = SEG4
ff_ clk[2] = SEG8
1-8 x 10G,
1 x 40G
SEG0-7,
SEG8
[63:0] = SEG0
[127:64] = SEG1
[191:128] = SEG2
[255:192] = SEG3
[319:256] = SEG4
[383:320] = SEG5
[447:384] = SEG6
[511:448] = SEG7
[767:512] = SEG8
ff_ clk[0] = SEG0-3
ff_ clk[1] = SEG4-7
ff_ clk[2] = SEG8