TX4939 Datasheet, PDF (108/756 Pages) Toshiba Semiconductor – 64-Bit TX System RISC

Toshiba RISC Processor
CG
TX4939
Table 5-6 Jitter Value in case of 451.584 MHz Source Clock describes jitter values in various sampling clocks generated by divide by 2.
The intermediate clock, i.e. 98.304 MHz, corresponds to 1,024fs for 96KHz sampling. This clock has large jitter in every steps. This
jitter will disappear when it reaches to 32fs for 96KHz sampling (32fs = 3.072MHz). This frequency corresponds to 64fs for 48KHz
sampling.
As jitter exists 64fs for 96KHz sampling, it may affect total harmonic distortion.
Table 5-6 Jitter Value in case of 451.584 MHz Source Clock
Source
(32/147)
Div 2
Div 2
Div 2
Div 2
Div 2
Div 2
451.584MHz 98.304MHz 49.152MHz 24.576MHz 12.288MHz 6.144MHz 3.072MHz 1.536MHz
192.000 KHz
512fs
256fs
128fs
64fs
32fs
16fs
8fs
96.000 KHz
1,024fs
512fs
256fs
128fs
64fs
32fs
16fs
48.000 KHz
2,048fs
1,024fs
512fs
256fs
128fs
64fs
32fs
5
Cycle - 00
-
-
-
-
-
-
-
Cycle - 01
-0.90ns
0.42ns
0.83ns
-0.55ns
-1.11ns
-
-
Cycle - 02
0.42ns
0.83ns
-0.55ns
-1.11ns
-
-
-
Cycle - 03
-0.48ns
-0.97ns
0.28ns
0.55ns
-1.11ns
-
-
Cycle - 04
0.83ns
-0.55ns
-1.11ns
-
-
-
-
Cycle - 05
-0.07ns
-0.14ns
-0.28ns
-0.55ns
-1.11ns
-
-
Cycle - 06
-0.97ns
0.28ns
0.55ns
-1.11ns
-
-
-
Cycle - 07
0.35ns
0.69ns
-0.83ns
0.55ns
-1.11ns
-
-
Cycle - 08
-0.55ns
-1.11ns
-
-
-
-
-
Cycle - 09
0.76ns
-0.69ns
0.83ns
-0.55ns
-1.11ns
-
-
Cycle - 10
-0.14ns
-0.28ns
-0.55ns
-1.11ns
-
-
-
Cycle - 11
-1.04ns
0.14ns
0.28ns
0.55ns
-1.11ns
-
-
Cycle - 12
0.28ns
0.55ns
-1.11ns
-
-
-
-
Cycle - 13
-0.62ns
0.97ns
-0.28ns
-0.55ns
-1.11ns
-
-
Cycle - 14
0.69ns
-0.83ns
0.55ns
-1.11ns
-
-
-
Cycle - 15
-0.21ns
-0.42ns
-0.83ns
0.55ns
-1.11ns
-
-
Cycle - 16
-1.11ns
-
-
-
-
-
-
In case of Source Clock=338.688 MHz mode, mdgen_32_147 generates 73.728 MHz, which corresponds to 768fs for 96KHz sampling.
It has certain level of jitter up to 8fs for 96KHz sampling. This is described Table 5-7 Jitter Value in case of 338.688 MHz Source Clock
below.
Table 5-7 Jitter Value in case of 338.688 MHz Source Clock
Source
338.688MHz
192.000 KHz
96.000 KHz
48.000 KHz
Cycle - 00
Cycle - 01
Cycle - 02
Cycle - 03
Cycle - 04
Cycle - 05
Cycle - 06
Cycle - 07
Cycle - 08
Cycle - 09
Cycle - 10
Cycle - 11
Cycle - 12
Cycle - 13
Cycle - 14
Cycle - 15
Cycle - 16
(32/147)
73.728MHz
384fs
768fs
1,536fs
-
-1.20ns
0.55ns
-0.65ns
1.11ns
-0.09ns
-1.29ns
0.46ns
-0.74ns
1.01ns
-0.18ns
-1.38ns
0.37ns
-0.83ns
0.92ns
-0.28ns
-1.48ns
Div 3
24.576MHz
128fs
256fs
512fs
-
-0.65ns
-1.29ns
1.01ns
0.37ns
-0.28ns
-0.92ns
1.38ns
0.74ns
0.09ns
-0.55ns
-1.20ns
1.11ns
0.46ns
-0.18ns
-0.83ns
-1.48ns
Div 2
12.288MHz
64fs
128fs
256fs
-
-1.29ns
0.37ns
-0.92ns
0.74ns
-0.55ns
1.11ns
-0.18ns
-1.48ns
0.18ns
-1.11ns
0.55ns
-0.74ns
0.92ns
-0.37ns
1.29ns
-
Div 2
6.144MHz
32fs
64fs
128fs
-
0.37ns
0.74ns
1.11ns
-1.48ns
-1.11ns
-0.74ns
-0.37ns
-
0.37ns
0.74ns
1.11ns
-1.48ns
-1.11ns
-0.74ns
-0.37ns
-
Div 2
3.072MHz
16fs
32fs
64fs
-
0.74ns
-1.48ns
-0.74ns
-
0.74ns
-1.48ns
-0.74ns
-
0.74ns
-1.48ns
-0.74ns
-
0.74ns
-1.48ns
-0.74ns
-
Div 2
1.536MHz
8fs
16fs
32fs
-
-1.48ns
-
-1.48ns
-
-1.48ns
-
-1.48ns
-
-1.48ns
-
-1.48ns
-
-1.48ns
-
-1.48ns
-
Div 2
0.768MHz
4fs
8fs
16fs
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
Rev. 3.3 May 18, 2007
5-8