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参数资料
| 型号： | MPC9230AC |
| 厂商： | INTEGRATED DEVICE TECHNOLOGY INC |
| 元件分类： | 时钟产生/分配 |
| 英文描述： | 750 MHz, OTHER CLOCK GENERATOR, PQFP32 |
| 封装： | 7 X 7 MM, 1.40 MM HEIGHT, LEAD FREE, O.80 MM PITCH, MS-026BBA, LQFP-32 |
| 文件页数： | 15/16页 |
| 文件大小： | 795K |
| 代理商： | MPC9230AC |
MPC9230 REVISION 8 MARCH 29, 2010
8
2010 Integrated Device Technology, Inc.
MPC9230 Data Sheet
800MHZ LOW VOLTAGE PECL CLOCK SYNTHESIZER
PROGRAMMING INTERFACE
Programming the MPC9230
Programming the MPC9230 amounts to properly configuring the
internal PLL dividers to produce the desired synthesized frequency
at the output. The output frequency can be represented by this
formula:
FOUT = (fXTAL ÷ 16) (4 M) ÷ (2 N) or
(1)
FOUT = (fXTAL ÷ 8) M ÷ N(2)
where fXTAL is the crystal frequency, M is the PLL feedback- divider
and N is the PLL post-divider. The input frequency and the selection
of the feedback divider M is limited by the VCO-frequency range.
fXTAL and M must be configured to match the VCO frequency range
of 800 to 1600 MHz in order to achieve stable PLL operation:
MMIN = 4fVCO,MIN ÷ fXTAL and
(3)
MMAX = 4fVCO,MAX ÷ fXTAL
(4)
For instance, the use of a 16 MHz input frequency requires the
configuration of the PLL feedback divider between M = 200 and M =
400. Table 10 shows the usable VCO frequency and M divider range
for other example input frequencies. Assuming that a 16 MHz input
frequency is used, equation (2) reduces to:
FOUT = 2 M ÷ N(5)
Table 10. MPC9230 Frequency Operating Range
VCO frequency for an crystal interface frequency of [MHz]
Output frequency for fXTAL=16 MHz and for N =
M
M[8:0]
10
12
14
16
18
20
1
2
4
8
160
010100000
800
170
010101010
850
180
010110100
810
900
190
010111110
855
950
200
011001000
800
900
1000
400
200
100
50
210
011010010
840
945
1050
420
210
105
52.5
220
011011100
880
990
1100
440
220
110
55
230
011100110
805
920
1035
1150
460
230
115
57.5
240
011110000
840
960
1080
1200
480
240
120
60
250
011111010
875
100
1125
1250
500
250
125
62.5
260
100000100
910
1040
1170
1300
520
260
130
65
270
100001110
810
945
1080
1215
1350
540
270
135
67.5
280
100011000
840
980
1120
1260
1400
560
280
140
70
290
100100010
870
1015
1160
1305
1450
580
290
145
72.5
300
100101100
900
1050
1200
1350
1500
600
300
150
75
310
100110110
930
1085
1240
1395
1550(1)
1. This VCO frequency is only available at the 0°C to +70°C temperature range.
620
310
155
77.5
320
101000000
800
960
1120
1280
1440
1600(1)
640
320
160
80
330
101001010
825
990
1155
1320
1485
660
330
165
82.5
340
101010100
850
1020
1190
1360
1530(1)
680
340
170
85
350
101011110
875
1050
1225
1400
1575(1)
700
350
175
87.5
360
101101000
900
1080
1260
1440
720
360
180
90
370
101110010
925
1110
1295
1480
740
370
185
92.5
380
101111100
950
1140
1330
1520(1)
760(2)
2. This output frequency is only available at the 0°C to +70°C temperature range.
380(2)
190(2)
95(2)
390
110000110
975
1170
1365
1560(1)
780(2)
390(2)
195(2)
97.5(2)
400
110010000
1000
1200
1400
1600(1)
800(2)
400(2)
200(2)
100(2)
410
110011010
1025
1230
1435
420
110100100
1050
1260
1470
430
110101110
1075
1290
1505(1)
440
110111000
1100
1320
1540(1)
450
111000010
1125
1350
1575(1)
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