CY25811 Cypress Semiconductor Corporation., CY25811 Datasheet - Page 4

• Manufacturer Part Number: CY25811
• Description: Spread Spectrum Clock Generator
• Manufacturer: Cypress Semiconductor Corporation.

Input and Output Frequency Selection
The relationship between input frequency versus output frequency in terms of device selection and FRSEL setting is given in
As shown, the input frequency range is selected by FRSEL and is the same for CY25811, CY25812, and CY25814. The selection of
CY25811 (1x), CY25812 (2x) or CY25814 (4x) determines the frequency multiplication at the output (SSCLK, Pin 5) with respect to
input frequency (XIN, Pin-1).
Table 5. Input and Output Frequency Selection
Document Number: 38-07112 Rev. *F
Input Frequency Range
16 to 32
16 to 32
16 to 32
8 to 16
8 to 16
8 to 16
(MHz)
4 to 8
4 to 8
4 to 8
FRSEL
M
M
M
0
1
0
1
0
1
CY25811
CY25811
CY25811
CY25812
CY25812
CY25812
CY25814
CY25814
CY25814
Product
Multiplication
1x
1x
1x
2x
2x
2x
4x
4x
4x
Output Frequency Range
64 to 128
16 to 32
16 to 32
32 to 64
16 to 32
32 to 64
8 to 16
8 to 16
(MHz)
4 to 8
CY25811/12/14
Page 4 of 12
Table
5.
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