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參數(shù)資料
| 型號： | HFA3683A |
| 廠商： | INTERSIL CORP |
| 元件分類： | 無繩電話/電話 |
| 英文描述： | 288 MACROCELL 3.3 VOLT ISP CPLD |
| 中文描述： | TELECOM, CELLULAR, RF AND BASEBAND CIRCUIT |
| 封裝： | PLASTIC, TQFP-64 |
| 文件頁數(shù)： | 7/17頁 |
| 文件大?。?/td> | 187K |
| 代理商： | HFA3683A |
2-7
PLL Synthesizer Table
SERIAL BITS
REGISTER
DEFINITION
LSB 1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
MSB
R Counter
0
0
R(0) R(1) R(2) R(3) R(4) R(5) R(6) R(7) R(8) R(9) R(10) R(11) R(12) R(13) R(14)
X (Don’t Care)
A/B Counter
0
1
A(0) A(1) A(2) A(3) A(4) A(5) A(6) B(0) B(1) B(2)
B(3)
B(4)
B(5)
B(6)
B(7)
B(8)
B(9) B(10)
Operational
Mode
1
0
M(0)
0
M(2) M(3) M(4) M(5) M(6) M(7) M(8)
0
0
0
0
M(13) M(14) M(15)
X
X
Reference Frequency Counter/Divider
BIT
DESCRIPTION
R(0-14)
Least significant bit R(0) to most significant bit R(14) of the divide by R counter. The Reference signal frequency is divided down
by this counter and is compared with a divided LO by a phase detector.
LO Frequency Counters/Dividers
BIT
DESCRIPTION
A(0-6)
Least significant bit A(0) to most significant bit A(6) of a 7-bit Swallow counter and LSB B(0) to MSB B(10) of the 11-bit divider.
The LO frequency is divided down by [P
*
B+A], where P is the Prescaler divider set by bit M(2). This divided signal frequency is
compared by a phase detector with the divided Reference signal.
B(0-11)
Operational Modes
BIT
DESCRIPTION
M(0)
(PLL_PE), Phase Lock Loop Power Enable. 1 = Enable, 0 = Power Down. Serial port always on.
M(2)
Prescaler Select. 0 = 32/33, 1 = 64/65
M(3)
M(4)
Charge Pump Current Setting
M(4)
M(3)
OUTPUT SINK/SOURCE
0
0
0.25mA
0
1
0.50mA
1
0
0.75mA
1
1
1.00mA
M(5)
M(6)
Charge Pump Sign
M(6)
M(5)
0
0
Source Current if LO/ [P
*
B+A] < Ref/R
Source Current if LO/ [P
*
B+A] > Ref/R
M(7)
0
1
M(7)
M(8)
M(13)
LD Pin Multiplex Operation
M(13)
M(8)
OUTPUT AT PIN LD
0
0
X
Lock Detect Operation
0
1
X
Short to GND
1
0
X
Serial Register Read Back
1
1
0
Ref. Divided by R Waveform
1
1
1
LO Divided by [P
*
B+A]
Waveform
M(14)
M(15)
Charge Pump Operation/Test
M(15)
M(14)
OPERATION/TEST
0
0
Normal Operation
0
1
Charge Pump Constant Current Source
1
0
Charge Pump Constant Current Sink
1
1
High Impedance State
HFA3683A
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