CDC960 Datasheet, PDF (3/38 Pages) Texas Instruments – 200-MHz CLOCK SYNTHESIZER/DRIVER WITH SPREAD SPECTURM CAPABILITY AND DEVICE CONTROL INTERFACE

SMBus
CONTROLLED
CDC960
200ĆMHz CLOCK SYNTHESIZER/DRIVER
WITH SPREAD SPECTRUM CAPABILITY AND DEVICE CONTROL INTERFACE
SCAS675 – APRIL 2002
FUNCTION TABLES (Continued)
INPUT
0
Spread
1
SPREAD SPECTRUM
Spread spectrum disabled
Spread spectrum enabled, –0.5% at CPU/CPU, PCI/LDT, PCI_F, PCI
INPUTS
DEVICE ENABLE FUNCTIONS
OUTPUTS
INTERNAL
L
L
X X X X L L L X Xtal Hi-Z Hi-Z Hi-Z Hi-Z Hi-Z Hi-Z Hi-Z Hi-Z
L
X
X H H H H X X X Xtal ↑↓ ↑↓ ↑↓ ↑↓ ↑↓ ↑↓ ↑↓ ↑↓
L
X
X H H L H X X X Xtal ↑↓ ↑↓ ↑↓ L
L
↑↓ ↑↓ ↑↓
L
X
X H L H H X X X Xtal ↑↓ ↑↓ ↑↓ ↑↓ ↑↓ ↑↓ ↑↓ ↑↓
L
X
X H L L H X X X Xtal ↑↓ ↑↓ ↑↓ L
L
↑↓ ↑↓ ↑↓
L
X
X L H H H X X X Xtal ↑↓ ↑↓ ↑↓ ↑↓ ↑↓ ↑↓ ↑↓ ↑↓
L
X
X L H L H X X X Xtal ↑↓ ↑↓ ↑↓ L
↑↓ ↑↓ ↑↓ ↑↓
L
X
X L L H H X X X Xtal ↑↓ ↑↓ ↑↓ ↑↓
L
↑↓ ↑↓ ↑↓
L
X
X L L L H X X X Xtal ↑↓ ↑↓ ↑↓ L
L
↑↓ ↑↓ ↑↓
L
L
X X X H L L HX H
H
L HL HL HL L
L
L
L
L
X H X H L L HX L
L
H HL HL HL L
L
L
L
L
X H H L L L HX L
L
H HL L
L
L
L
L
L
L
X L L H L L HX H
H
L HL HL L
L
L
L
L
L
X L H L L L HX L
L
H HL L HL L
L
L
L
L
X H H L L H XX H
H
L HL L
L HL HL HL
L
L
X H H L L H XX L
L
H HL L
L HL HL HL
L
L
X H L H L H XX H
H
L HL HL HL HL HL HL
L
L
X H L H L H XX L
L
H HL HL HL HL HL HL
L
L
X L H L L H X X L/H L/H H/L HL L HL HL HL HL
L
L
X L L H L H X X L/H L/H H/L HL HL L HL HL HL
L
L
X L L L L H X X L/H L/H H/L HL L
L HL HL HL
† _{SMBus bits set to their reset values}
‡ _{Hi-Z will have LOW state if external load circuit is applied, CPU and CPU are push-pull type outputs.}
↑↓ Outputs toggle at the selected frequency according to the Device Frequency Select FunctionS table above.
HL device output state is undefined, either L or H. It is L if Xin is held static at L or H before the bypass mode is selected.
BUFFER NAME
CPU
PCI, PCI_F, LDT
REF, USB, FDC
OUTPUT BUFFER SPECIFICATIONS
VDD RANGE
(V)
IMPEDANCE
(Ω)
3.135 – 3.465
40
3.135 – 3.465
25
3.135 – 3.465
35
LUMPED TEST LOAD
10 pF
30 pF
20 pF
Off
Off
↑↓
↑↓
↑↓
↑↓
↑↓
↑↓
↑↓
↑↓
↑↓
↑↓
↑↓
↑↓
↑↓
↑↓
↑↓
↑↓
Off
Off
Off
Off
Off
Off
Off
Off
Off
Off
Off
Off
Off
Off
Off
Off
Off
Off
Off
Off
Off
Off
Off
Off
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