CDCE925

CDCEL925

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SCAS847F – JULY 2007 – REVISED MARCH 2010

Table 9. Generic Configuration Register (continued)

Offset

(1)

Bit

(2)

Acronym

Default

(3)

Description

07h-0Fh

—

0h

Reserved – do not write other than 0

Table 10. PLL1 Configuration Register

Acronym

DESCRIPTION

10h

7:5

SSC1_7 [2:0]

000b

4:2

SSC1_6 [2:0]

000b

Down

Center

000 (off)

000 (off)

1:0

SSC1_5 [2:1]

001 – 0.25%

001 ± 0.25%

000b

010 – 0.5%

010 ± 0.5%

11h

7

SSC1_5 [0]

011 – 0.75%

011 ± 0.75%

6:4

SSC1_4 [2:0]

000b

100 – 1.0%

100 ± 1.0%

101 – 1.25%

101 ± 1.25%

3:1

SSC1_3 [2:0]

000b

110 – 1.5%

110 ± 1.5%

0

SSC1_2 [2]

111 – 2.0%

111 ± 2.0%

000b

12h

7:6

SSC1_2 [1:0]

5:3

SSC1_1 [2:0]

000b

2:0

SSC1_0 [2:0]

000b

13h

7

FS1_7

0b

6

FS1_6

0b

5

FS1_5

0b

4

FS1_4

0b

3

FS1_3

0b

2

FS1_2

0b

1

FS1_1

0b

0

FS1_0

0b

14h

PLL1 Multiplexer:

0 – PLL1

7

MUX1

1b

1 – PLL1 Bypass (PLL1 is in power down)

Output Y2 Multiplexer:

0 – Pdiv1

6

M2

1b

1 – Pdiv2

Output Y3 Multiplexer:

00 – Pdiv1-Divider

01 – Pdiv2-Divider

5:4

M3

10b

10 – Pdiv3-Divider

11 – reserved

3:2

Y2Y3_ST1

11b

Y2, Y3-State0/1definition: 00 – Y2/Y3 disabled to 3-State (PLL1 is in power down)

01 – Y2/Y3 disabled to 3-State (PLL1 on)

10–Y2/Y3 disabled to low (PLL1 on)

1:0

Y2Y3_ST0

01b

11 – Y2/Y3 enabled (normal operation, PLL1 on)

15h

7

Y2Y3_7

0b

6

Y2Y3_6

0b

0 – state0 (predefined by Y2Y3_ST0)

1 – state1 (predefined by Y2Y3_ST1)

5

Y2Y3_5

0b

4

Y2Y3_4

0b

3

Y2Y3_3

0b

2

Y2Y3_2

0b

1

Y2Y3_1

1b

0

Y2Y3_0

0b

16h

PLL1 SSC down/center selection:

0 – down

7

SSC1DC

0b

1 – center

7-Bit Y2-Output-Divider Pdiv2:

0 – reset and stand-by

6:0

Pdiv2

01h

1-to-127 – divider value

17h

7

—

0b

Reserved – do not write others than 0

7-Bit Y3-Output-Divider Pdiv3:

0 – reset and stand-by

6:0

Pdiv3

01h

1-to-127 – divider value

(1)

Writing data beyond 30h may adversely affect device function.

(2)

All data is transferred MSB-first.

(3)

Unless a custom setting is used

(4)

The user can predefine up to eight different control settings. In normal device operation, these settings can be selected by the external

control pins, S0, S1, and S2.

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