DS525 Datasheet, PDF (10/13 Pages) –

802.16e CTC Encoder v3.0
Table 2: Latency Values for Fixed Block Sizes (Continued)
Blk_size
Block Size N
(Couples)
Latency
First Input to First Output
(Typical)(Cycles)
27
108
226
30
120
250
36
144
298
45
180
370
D ₄₈
192
394
54
216
442
i ⁶⁰
240
490
s₁₂₀
480
970
240
960
1930
c₃₆₀
1440
2890
480
1920
3850
o₆₀₀
2400
4810
n ^Notes:
1. For a constant block size, First-in-last-out latency= 2N+d cycles, where N is the block size in couples, and d is a fixed delay.
2. On block size changes from block size N₁ to N₂, the First-in-last-out latency is given by:
2max(N₁,N₂)+d for the first block of size N₂,
t _{max(N1,N2) + N2 + d for the second block,}
i ^{2N2+d thereafter.}
Where: N₁ and N₂ are block sizes in couples.
n _{3. First-in-last-out latency is (First-in-first-out latency)+N2-1 cycles,}
ued _IP ^{4. The fixed delay d is typically 10 cycles.}
10
www.xilinx.com
DS525 April 24, 2009
Product Specification