CY25823

Document Number: 38-07579 Rev. *D

Page 6 of 15

Bytes 2 through 5: Reserved Registers

1

1

0

1

Center

±0.80

1

1

1

0

Center

±1.00

1

1

1

1

Center

±1.10

Table 5. Spread Spectrum Select (Charge Pump = 11 and 01)

SS3

SS2

SS1

SS0

Spread Mode

Spread Amount %

(Charge pump = 11)

Spread Amount %

(Charge pump = 01)

0

0

0

0

Down

0.80

0.90

0

0

0

1

Down

0.90

1.10

0

0

1

0

Down

1.20

1.40

0

0

1

1

Down

1.40

1.60

0

1

0

0

Down

1.60

2.00

0

1

0

1

Down

1.75

2.20

0

1

1

0

Down

2.20

2.75

0

1

1

1

Down

2.60

3.30

1

0

0

0

Center

±0.38

±0.40

1

0

0

1

Center

±0.40

±0.50

1

0

1

0

Center

±0.50

±0.60

1

0

1

1

Center

±0.60

±0.70

1

1

0

0

Center

±0.75

±0.90

1

1

0

1

Center

±1.00

±1.25

1

1

1

0

Center

±1.15

±1.45

1

1

1

1

Center

±1.30

±1.65

Byte1[7:2] Control Register

Bit

@Pup

Pin#

Name

Pin Description

7

0

Reserved set equal to ‘0’

6

0

Reserved set equal to ‘0’

5

0

Reserved set equal to ‘0’

4

0

Reserved set equal to ‘0’

3

0

Reserved set equal to ‘0’

2

1

11,12

CLKEN

CLKOUT/CLKOUT# enable

0 =Disable, 1 = Enable

Byte 1: [1:0] Control Register (Charge Pump Settings)

Bit

@Pup

Default Value

One Step Higher Than Default

Two Steps Higher Than Default

10

0

1

1

00

0

1

0

Table 4. Spread Spectrum Select (Charge Pump = 00 or Default Condition) (continued)

SS3

SS2

SS1

SS0

Spread Mode

Spread Amount %

Byte 6: Vendor/Revision ID Register

Bit

@Pup

Pin#

Name

Pin Description

7

0

–

–

Revision ID Bit 3

6

0

–

–

Revision ID Bit 2

5

0

–

–

Revision ID Bit 1

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