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參數(shù)資料
| 型號(hào)： | UMA1021 |
| 廠商： | NXP Semiconductors N.V. |
| 英文描述： | Low-voltage frequency synthesizer for radio telephones |
| 中文描述： | 低電壓的無線電話頻率合成器 |
| 文件頁數(shù)： | 5/16頁 |
| 文件大?。?/td> | 104K |
| 代理商： | UMA1021 |
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5
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Table 1
Bit allocation; note 1
Notes
1.
2.
3.
4.
5.
6.
7.
X = don’t care.
The test register (address 0000) should not be programmed with any other values except all zeros for normal operation.
Bit OOL sets the Out-Of-Lock detector (1 = enabled).
Bits CR1 and CR0 set the charge pump current ratio (see Table 2).
Bit sPON sets the software power-up for the synthesizer (see Table 3).
PM16 is the MSB of the main divider coefficient.
PR10 is the MSB of the reference divider coefficient.
FIRST IN
REGISTER BIT ALLOCATION
LAST IN
DATA FIELD
ADDRESS
dt16
dt15 dt14 dt13
dt12
dt11
dt10
dt9
dt8 dt7
dt6
dt5 dt4 dt3 dt2 dt1
dt0
ad3
ad2
ad1
ad0
test bits; note 2
CR1
(4)
CR0
main divider coefficient
PR10
(7)
0
0
0
0
0
0
1
1
0
0
0
0
0
1
0
1
X
X
X
X
OOL
(3)
X
X
X
sPON
(5)
X
X
X
X
X
X
PM16
(6)
X
PM0
PR0
X
X
X
X
X
reference divider coefficient
Table 2
Charge pump current ratio; note 1
Note
1.
Reference current for charge pump:
BIT CR1
BIT CR0
CHARGE PUMP
CURRENT
10
×
I
set
18
×
I
set
13
×
I
set
17
×
I
set
0
0
1
1
0
1
0
1
I
set
V
R
set
----------
=
Table 3
Power-on programming
Notes
1.
Signal level
a) L = LOW.
b) X = don’t care.
c) H = HIGH.
X = don’t care.
2.
PIN PON
(1)
BIT sPON
(2)
SYNTHESIZER
STATE
L
X
H
X
0
1
off
off
on
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