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CY28419 Datasheet(PDF) 7 Page - Cypress Semiconductor

Part No. CY28419
Description  Clock Synthesizer with Differential SRC and CPU Outputs
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Maker  CYPRESS [Cypress Semiconductor]
Homepage  http://www.cypress.com
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CY28419 Datasheet(HTML) 7 Page - Cypress Semiconductor

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CY28419
Document #: 38-07444 Rev. *D
Page 7 of 16
Crystal Recommendations
The CY28419 requires a Parallel Resonance Crystal.
Substituting a series resonance crystal will cause the
CY28419 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.
Byte 6: Control Register 6
Bit
@Pup
Name
Description
70
REF
PCIF
PCI
3V66
USB_48
DOT_48
CPUT/C
SRCT/C
Test Clock Mode
0= Disabled, 1 = Enabled
6
0
Reserved, Set = 0
5
0
CPUC0, CPUT0
CPUC1, CPUT1
CPUC2, CPUT2
CPUC3, CPUT3
FS_A & FS_B Operation
0 = Normal, 1 = Test mode
4
0
SRCT, SRCC
SRC Frequency Select
0 = 100 MHz, 1 = 200 MHz
3
0
Reserved, Set = 0
2
0
PCIF
PCI
3V66
SRC(T/C)
CPUT/ C
Spread Spectrum Mode
0 = Spread Off, 1 = Spread On
1
1
REF_1
REF_1 Output Enable
0 = Disabled, 1 = Enabled
0
1
REF_0
REF_0 Output Enable
0 = Disabled, 1 = Enabled
Byte 7: Vendor ID
Bit
@Pup
Name
Description
7
0
Revision Code Bit 3
Revision Code Bit 3
6
0
Revision Code Bit 2
Revision Code Bit 2
5
0
Revision Code Bit 1
Revision Code Bit 1
4
0
Revision Code Bit 0
Revision Code Bit 0
3
1
Vendor ID Bit 3
Vendor ID Bit 3
2
0
Vendor ID Bit 2
Vendor ID Bit 2
1
0
Vendor ID Bit 1
Vendor ID Bit 1
0
0
Vendor ID Bit 0
Vendor ID Bit 0
Table 6. Crystal Recommendations
Frequency
(Fund)
Cut
Loading
Load
Cap
Drive
(max.)
Shunt
Cap
(max.)
Motional
(max.)
Tolerance
(max.)
Stability
(max.)
Aging
(max.)
14.31818 MHz
AT
Parallel
20 pF
0.1 mW
5 pF
0.016 pF
50 ppm
50 ppm
5 ppm


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