AK1573 Datasheet, PDF (25/42 Pages) Asahi Kasei Microsystems – Low Noise Integrated VCO

[AK1573/AK1573B/AK1573C]
D[13:0]
R[13:0] : 14bit Reference Counter
The following settings can be selected for the reference clock division.
The allowed range is 1 (1/1 division) to 16383 (1/16383 division). 0 cannot be set.
The maximum PFD frequency is 104MHz.
R[13:0]
0
1
2
3
4
:
:
:
16381
16382
16383
Dividing Ratio
Prohibited
1
2
3
4
:
:
:
16381
16382
16383
< Address0x04 : Function >
D[17]
LDCNTSEL : Lock Detect Precision
Set the counter value for digital lock detect.
LDCNTSEL
0
1
Function
15 times Count
3 times Count
31 times Count
7 times Count
unlocked to locked
locked to unlocked
unlocked to locked
locked to unlocked
D[16]
FASTEN : Enables the Fast Lock mode
See “14. Fast Lock-up mode” for details of the Fast Lock-up function.
0: Fast Lockup disable
1: Fast Lockup enable
D[15]
CPHIZ : TRI-STATE output setting for charge pump
0: Charge pumps are activated
1: Tri-State
D[14]
LD : Selects output from LD pin
See “12. Lock detect” for details of the Lock detect function.
0: Digital lock detect
1: Analog lock detect
015009351-E-00
- 25 -
2015/8