CY28419 Cypress Semiconductor, CY28419 Datasheet - Page 7

• Manufacturer Part Number: CY28419
• Description: Clock Synthesizer
• Manufacturer: Cypress Semiconductor

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