CDC960 Datasheet, PDF (31/38 Pages) Texas Instruments – 200-MHz CLOCK SYNTHESIZER/DRIVER WITH SPREAD SPECTURM CAPABILITY AND DEVICE CONTROL INTERFACE

CDC960
200ĆMHz CLOCK SYNTHESIZER/DRIVER
WITH SPREAD SPECTRUM CAPABILITY AND DEVICE CONTROL INTERFACE
SCAS675 – APRIL 2002
PARAMETER MEASUREMENT INFORMATION
Bus Clock(n)
Bus Clock(n+1) VT_REF
t(sk_0)
Ť Ť _{t(sk_p) + tw(l) * tw(h)}
Refer to Figure 4
VT_REF
tw(l)
t(low)
t(sk_0)
tc
tw(h)
t(high)
VIH_REF
VIL_REF
t_{(low or high)}
Duty Cycle +
t_c
100
Bus(A) Clock(x)
VT_REF
Bus(B) Clock(x)
CPU Clock(n)
CPU Clock(n+1)
VT_REF
t(sk_0)
t(sk_0) = Bus(B) Clock(x) – Bus(A) Clock(x)
a) Single-Ended Outputs
t(sk_b)
V(cross_H)
V(cross_L)
tc
t(sk_b)
tw(l)
tw(h)
Duty Cycle = ^{tw(Low or High)}
tc
x 100
CPU Clock(x)
V(cross_H)
V(cross_L)
Bus(B) Clock(x)
t(sk_0)
VT_REF
t(sk_0) = Bus(B) Clock(x) – CPU Clock(x)
b) Differential Ouput
Figure 8. Waveforms for Calculation of Skew and Offset
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