[AK1546]

8. Block Functional Descriptions

1. Frequency Setup

The following formula is used to calculate the frequency setting for the AK1546.

Where :

N

: Dividing number N = [ (P × B) + A ]

P

: Prescaler Value (See < Address2>:{Pre[1:0]})

B

: B (Programmable) counter value (See <Address1>:{B[12:0]})

A

: A (Swallow) counter value (See <Address1>:{A[5:0]})

Calculation example

frequency is 2460MHz.

AK1546 setting :

R (Reference counter)=10000000/200000 = 50 (<Address0>:{R[13:0]}= “50”)

P=32 (<Address2>:{PRE[1:0]}=”10Bin”)

B=384 (<Address1>:{B[12:0]}=”384”)

A=12 (<Address1>:{A[5:0]}=”12”)

Frequency setting = 200kHz × [ (32×384) + 12] = 2460MHz

Lower limit for setting consecutive dividing numbers

In the AK1546, it is impossible to set consecutive dividing numbers below the lower limit. The lower limit is

calculated by the following formula;

For example, in the case of P=16, it can be set 240 and over as consecutive dividing numbers.

MS1388-E-00

11

2012/3