DEMOBOARD-U3600BM Atmel, DEMOBOARD-U3600BM Datasheet - Page 21

• Manufacturer Part Number: DEMOBOARD-U3600BM
• Description: BOARD DEMO FOR U3600BM
• Manufacturer: Atmel
• Type: Cordless Phone ICr

Specifications of DEMOBOARD-U3600BM

• Contents: Board, Software and Documentation
• For Use With/related Products: U3600BM
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

10. Tables for Programming of the Dividers (Refer to Block Diagram)
Table 10-1.
Table 10-2.
Table 10-3.
10.1
4516D–CT0–10/05
D11 (bit)
D20 (bit)
D31 (bit)
0
0
1
1
0
0
0
0
1
1
Divider M for Reference Frequency of PLL1
Divider D1 for PLL2
Divider D2 between PLL1 and PLL2
Divider D3 for PLL1
D10 (bit)
D30 (bit)
0
1
0
1
0
1
0
1
There are several countries like Spain, the Netherlands and Portugal with relatively low modula-
tor frequencies fMod. In case of modulation there will be a big maximum time shift between
pulses coming from fractional divider and pulses coming from reference frequency divider. As a
consequence the phase comparator enters an undesired operation mode. To avoid entering this
operation mode the reference frequency f
keeping f
The connection between the additional reference frequency divider M and the factors P
of fractional divider is given below. The subscript M denotes which value of M refers to the fac-
tors P
fraction Q
P
Q
M
M
= P
= Q
M
1
1
and Q
Mod
M
M + integer (Q
Decimally
Decimally
Decimally
M - 223
/223 must not exceed 223.
constant, the factors of fractional dividers have to be changed as well.
M
0
1
2
3
0
1
0
1
2
3
of fractional divider. The formulas take into account that the numerator of the
integer (Q
D1 (Block Diagram),if M12 = 0
D2 (Block Diagram),if M12 = 0
M/223)
D3 (Block Diagram)
1
M/223)
2
8
6
4
6
8
1
2
6
4
Ref1
has to be reduced by a factor M. Simultaneously,
D1 (Block Diagram),if M12 = 1
D2 (Block Diagram),if M12 = 1
1
4
3
2
3
4
U3600BM
M
and Q
21
M