Reference Design Example

You must also observe the operating range limits:

(V[8:0] +8)

10MHz < 48MHz ·

(R[6:0] +2)

R[6:0] < 118

Table 4-5 LM_OSCx registers

Bits

Name

Access

Function

 

 

 

 

18:16

OD

Read/write

Output divider:

 

 

 

000

= divide by 10

 

 

 

001

= divide by 2

 

 

 

010

= divide by 8

 

 

 

011

= divide by 4

 

 

 

100

= divide by 5

 

 

 

101

= divide by 7

 

 

 

110

= divide by 9

 

 

 

111

= divide by 6.

 

 

 

 

15:9

RDW

Read/write

Reference divider word. Defines the binary value of

 

 

 

the R[6:0] pins of the clock generator.

 

 

 

 

8:0

VDW

Read/write

VCO divider word. Defines the binary value of the

 

 

 

V[8:0] pins of the clock generator.

 

 

 

 

 

Note

The default values for these registers set CLK1 to 25MHz and CLK2 to 12MHz.

4-10

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ARM DUI 0163B

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Arm Enterprises IM-AD1 manual LMOSCx registers Bits Name Access Function, Rdw, Vdw