|
AK1543 Datasheet, PDF (30/35 Pages) Asahi Kasei Microsystems – 1300MHz Delta-Sigma FractionalSigma -N Frequency Synthesizer | |||
|
◁ |
2. Power-up Sequence
[AK1543]
PVDD,CPVDD
PDN1
On-chip LDO
0V
(1.8V)
Refin
50ïs
1.8V
Donât care
Refin must be input before setting [PDN2] to âHighâ
input
Write to register
PDN2(PLL)
CP
H or L
Registers can be written
After more than 50ïs from the [PDN1] is set to âHighâ
Here [PDN1] is set to âHighâ after or at the same time as power-up.
HiZ
Output(*1)
*1 CP output is not defined before writing the data in
all addresses of the register. After writing them,
CP output can be controlled by register.
Fig. 13 Power Sequence
MS1206-E-02
30
2013/03
|
▷ |