cy28445-5 SpectraLinear Inc, cy28445-5 Datasheet - Page 13

• Manufacturer Part Number: cy28445-5
• Description: Clock Generator For Intel Calistoga Chipset
• Manufacturer: SpectraLinear Inc

Rev 1.1, June 30, 2007
Byte 18: Control Register 18 (continued)
Byte 19: Control Register 19
Table 5. Crystal Recommendations
The CY28445-5 requires a Parallel Resonance Crystal.
Substituting a series resonance crystal will cause the
CY28445-5 to operate at the wrong frequency and violate the
ppm specification. For most applications there is a 300-ppm
frequency shift between series and parallel crystals due to
incorrect loading.
1
0
7
6
5
4
3
2
1
0
14.31818 MHz
Frequency
Bit
Bit
(Fund)
@Pup
@Pup
0
0
0
0
0
0
0
0
0
1
Cut
AT
CLKREQ#3
CLKREQ#3
CLKREQ#1
CLKREQ#1
CLKREQ#1
CLKREQ#1
CLKREQ#1
CLKREQ#1
CLKREQ#1
CLKREQ#1
Loading Load Cap
Parallel
Name
Name
20 pF
0.1 mW
SRC[T/C]2 Control
0 = SRC[T/C]2 not stoppable by CLKREQ#3
1 = SRC[T/C]2 stoppable by CLKREQ#3
SRC[T/C]1 Control
0 = SRC[T/C]1 not stoppable by CLKREQ#3
1 = SRC[T/C]1 stoppable by CLKREQ#3
SRC[T/C]8 Control
0 = SRC[T/C]8 not stoppable by CLKREQ#1
1 = SRC[T/C]8 stoppable by CLKREQ#1
SRC[T/C]7 Control
0 = SRC[T/C]7 not stoppable by CLKREQ#1
1 = SRC[T/C]7 stoppable by CLKREQ#1
SRC[T/C]6 Control
0 = SRC[T/C]6 not stoppable by CLKREQ#1
1= SRC[T/C]6 stoppable by CLKREQ#1
SRC[T/C]5 Control
0 = SRC[T/C]5 not stoppable by CLKREQ#1
1 = SRC[T/C]5 stoppable by CLKREQ#1
SRC[T/C]4 Control
0 = SRC[T/C]4 not stoppable by CLKREQ#1
1 = SRC[T/C]4 stoppable by CLKREQ#1
SRC[T/C]3 Control
0 = SRC[T/C]3 not stoppable by CLKREQ#1
1 = SRC[T/C]3 stoppable by CLKREQ#1
SRC[T/C]2 Control
0 = SRC[T/C]2 not stoppable by CLKREQ#1
1 = SRC[T/C]2 stoppable by CLKREQ#1
SRC[T/C]1 Control
0 = SRC[T/C]1 not stoppable by CLKREQ#1
1 = SRC[T/C]1 stoppable by CLKREQ#1
(max.)
Drive
Shunt Cap
(max.)
5 pF
Motional
0.016 pF
(max.)
Description
Description
Tolerance
35 ppm
(max.)
Stability
CY28445-5
30 ppm
(max.)
Page 13 of 26
(max.)
Aging
5 ppm