AK1548 Datasheet, PDF (20/42 Pages) Asahi Kasei Microsystems – 8GHz Low Noise Integer-N Frequency Synthesizer

[AK1548]
Notes for writing into registers
After powers on AK1548, the initial register value is not defined. It is required to write the data in all addresses in
order to commit it.
[Examples of writing into registers]
(Ex. 1) Power-On
- Bring [PDN] to ”0 (Low)”
- Apply VDD
- Program Address0, Address1 and Address2
- Bring [PDN] to ”1 (High)”
- Program {PD1} in Address 2 to “0”
(Ex. 2) Changing frequency settings : Initialization
- Program Address3
- Program Address1
(Ex. 3) Changing frequency settings : Counter reset
- Program Address2. As part of this, load “1” to both {PD1} and {CNTR_RST}.
- Program Address1
- Program Address2. As part of this, load “0” to both {PD1} and {CNTR_RST}.
(Ex. 4) Changing frequency settings : PDN pin method
- Bring [PDN] to ”0 (Low)”
- Program Address1
- Bring [PDN] to ”1 (High)”
MS1364-E-00
20
2012/1