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参数资料
| 型号： | WB1356X |
| 英文描述： | Serial-Input Frequency Synthesizer |
| 中文描述： | 串行输入频率合成器 |
| 文件页数： | 8/10页 |
| 文件大小： | 201K |
| 代理商： | WB1356X |
WB1356
7
Serial Data Input
Data is input serially using the DATA, CLOCK, and LE pins.
Two control bits direct data into the locations given in Table 1.
Notes:
2.
t1–t5 = 50 s > t > 0.5 s
3.
CLOCK may remain HIGH after latching in data.
4.
DATA is shifted in with the MSB first.
5.
For DATA definitions, refer to Table 2.
Serial Data Input Timing Waveform[2, 3, 4, 5]
Timing Waveforms (continued)
CLOCK
//
LE
//
t2
t1
t3
t4
t5
DATA
PD = MSB
PRE
B1
A7
CNT2
CNT1 = LSB
Table 1. Control Configuration
CNT1
CNT2
Function
00
Program Reference 2: R = 3 to 32767, set PLL2 (low frequency) phase detector
polarity, set current in PLL2, set PLL2 three-state, set monitor selector to PLL2.
01
Program Reference 1: R = 3 to 32767, set PLL1 (high frequency) phase detector
polarity, set current in PLL1, set PLL1 three-state, set monitor selector to PLL1.
10
Program Counter for PLL2: A = 0 to 127, B = 3 to 2047, set PLL2 prescaler ratio, set
power-down to PLL2.
11
Program Counter for PLL1: A = 0 to 127, B = 3 to 2047, set PLL1 prescaler ratio, set
power-down to PLL1.
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