UMA1021M Datasheet, PDF (6/16 Pages) NXP Semiconductors – Low-voltage frequency synthesizer for radio telephones

Table 1 Bit allocation; note 1
FIRST IN
REGISTER BIT ALLOCATION
DATA FIELD
dt16 dt15 dt14 dt13 dt12 dt11 dt10 dt9 dt8 dt7 dt6 dt5 dt4 dt3 dt2 dt1 dt0 ad3
Test bits⁽²⁾
0
X
X X X OOL⁽³⁾ X CR1 CR0 X X sPON⁽³⁾ X X X X X X
0
PM16⁽⁴⁾
main divider coefficient
PM0 0
X
XXX
X
X PR10⁽⁴⁾
reference divider coefficient
PR0 0
LAST IN
ADDRESS
ad2 ad1 ad0
0
0
0
0
0
1
1
0
0
1
0
1
Notes
1. X = don’t care.
2. The test register (address 0000) should not be programmed with any other values except all zeros for normal operation.
3. Bit sPON = software power-up for synthesizer (see Table 2); OOL = Out-Of-Lock (1 = enabled).
4. PM16 is the MSB of the main divider coefficient; PR10 is the MSB of the reference divider coefficient.
Table 2 Power-on programming
POL
0
0
0
1
1
1
PON
0
1
X
0
X
1
sPON
0
X
1
X
0
1
SYNTHESIZER STATE
on
off
off
off
off
on
COMPATIBILITY
UMA1019M/UMA1019AM
UMA1019M/UMA1019AM
UMA1019M/UMA1019AM
UMA1017M
UMA1017M
UMA1017M
Table 3 Fast and normal charge pumps current ratio (note 1)
CR1
0
0
1
1
CR0
0
1
0
1
I_CP
2 × I_SET
2 × I_SET
1 × I_SET
1 × I_SET
Note
1. I_SET = _R-V----^SS---^EE----^TT- ; reference current for charge pumps.
I_CPF
8 × I_SET
16 × I_SET
12 × I_SET
16 × I_SET
I_CPF : I_CP
4:1
8:1
12 : 1
16 : 1