CY25811/12/14
Input and Output Frequency Selection
The relationship between input frequency and output frequency in 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
Input Frequency Range
(MHz)
4 to 8
8 to 16
16 to 32
4 to 8
8 to 16
16 to 32
4 to 8
8 to 16
16 to 32
FRSEL
0
1
M
0
1
M
0
1
M
Product
CY25811
CY25811
CY25811
CY25812
CY25812
CY25812
CY25814
CY25814
CY25814
Multiplication
1x
1x
1x
2x
2x
2x
4x
4x
4x
Output Frequency Range
(MHz)
4 to 8
8 to 16
16 to 32
8 to 16
16 to 32
32 to 64
16 to 32
32 to 64
64 to 128
Document Number: 38-07112 Rev. *G
Page 4 of 13
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