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CY25811/12/14
Document Number: 38-07112 Rev. *F
Page 4 of 12
Input and Output Frequency Selection
The relationship between input frequency versus output frequency in terms of device selection and FRSEL setting is given in Table 5.
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
Input Frequency Range
(MHz)
FRSEL
Product
Multiplication
Output Frequency Range
(MHz)
4 to 8
0
CY25811
1x
4 to 8
8 to 16
1
CY25811
1x
8 to 16
16 to 32
M
CY25811
1x
16 to 32
4 to 8
0
CY25812
2x
8 to 16
8 to 16
1
CY25812
2x
16 to 32
16 to 32
M
CY25812
2x
32 to 64
4 to 8
0
CY25814
4x
16 to 32
8 to 16
1
CY25814
4x
32 to 64
16 to 32
M
CY25814
4x
64 to 128
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