Analog Devices TigerSHARC ADSP-TS201S - Manual (Page 31)

ADSP-TS201S
Rev. C | Page 31 of 48 | December 2006
Link Port—Data Out Timing
Table 32 with Figure 18 , Figure 19 , Figure 20 , Figure 21 ,
Figure 22 , and Figure 23 provide the data out timing for the
LVDS link ports.
Table 32. Link Port—Data Out Timing
Parameter Description Min Max Unit
Outputs
t
REO
Rising Edge ( Figure 19 ) 350 ps
t
FEO
Falling Edge ( Figure 19 ) 350 ps
t
LCLKOP
LxCLKOUT Period ( Figure 18 ) Greater of 2.0 or
0.9
× LCR × t
CCLK
1, 2, 3
Smaller of 12.5 or
1.1
× LCR × t
CCLK
1, 2, 3 ns
t
LCLKOH
LxCLKOUT High ( Figure 18 ) 0.4 × t
LCLKOP
1 0.6 × t
LCLKOP
1 ns
t
LCLKOL
LxCLKOUT Low ( Figure 18 ) 0.4
× t
LCLKOP
1 0.6
× t
LCLKOP
1 ns
t
COJT
LxCLKOUT Jitter ( Figure 18 ) ±150 4, 5, 6
±250 7
ps
ps
t
LDOS
LxDATO Output Setup ( Figure 20 ) 0.25
× LCR × t
CCLK
– 0.10
× t
CCLK
1, 4, 8
0.25 × LCR × t
CCLK
– 0.15 × t
CCLK
1, 5, 6, 8
0.25 × LCR × t
CCLK
– 0.30 × t
CCLK
1, 7, 8
ns
ns
ns
t
LDOH
LxDATO Output Hold ( Figure 20 ) 0.25
× LCR × t
CCLK
– 0.10
× t
CCLK
1, 4, 8
0.25 × LCR × t
CCLK
– 0.15 × t
CCLK
1, 5, 6, 8
0.25 × LCR × t
CCLK
– 0.30 × t
CCLK
1, 7, 8
ns
ns
ns
t
LACKID
Delay from LxACKI rising edge to first transmission
clock edge (
Figure 21 )
16
× LCR × t
CCLK
1, 2 ns
t
BCMPOV
LxBCMPO Valid ( Figure 21 ) 2
× LCR × t
CCLK
1, 2 ns
t
BCMPOH
LxBCMPO Hold ( Figure 22 ) 3 × TSW – 0.5 1, 9 ns
Inputs
t
LACKIS
LxACKI low setup to guarantee that the transmitter
stops transmitting (
Figure 22 )
LxACKI high setup to guarantee that the transmitter
continues its transmission without any interruption
(
Figure 23 ) 16 × LCR × t
CCLK
1, 2 ns
t
LACKIH
LxACKI High Hold Time ( Figure 23 ) 0.51 ns
1 Timing is relative to the 0 differential voltage (V
OD
= 0).
2 LCR (link port clock ratio) = 1, 1.5, 2, or 4. t
CCLK
is the core period.
3 For the cases of t
LCLKOP
= 2.0 ns and t
LCLKOP
= 12.5 ns, the effect of t
COJT
specification on output period must be considered.
4 LCR= 1.
5 LCR= 1.5.
6 LCR= 2.
7 LCR= 4.
8 The t
LDOS
and t
LDOH
values include LCLKOUT jitter.
9 TSW is a short-word transmission period. For a 4-bit link, it is 2 × LCR × t
CCLK
. For a 1-bit link, it is 8 × LCR × t
CCLK
ns.