參數(shù)資料
型號(hào): LMX2352
廠商: National Semiconductor Corporation
英文描述: PLLatinum Fractional Dual Low Power Frequency Synthesizer(PLLatinum技術(shù)低耗雙通道頻率合成器)
中文描述: PLLatinum分?jǐn)?shù)雙低功耗頻率合成器(PLLatinum技術(shù)低耗雙通道頻率合成器)
文件頁數(shù): 17/20頁
文件大?。?/td> 378K
代理商: LMX2352
Programming Description
(Continued)
4.4.1 Programmable CMOS Output Truth Table
BIT
LOCATION
IF_N[17]
FUNCTION
0
1
OUT_0
OUT0 CMOS output pin level
set
OUT1 CMOS output pin level
set
FastLock mode select
LOW
HIGH
OUT_1
IF_N[18]
LOW
HIGH
FastLock
When the FastLock bit is set to one,
OUT_0
and
OUT_1
are don’t care bits. FastLock mode utilizes the OUT0 and OUT1 output
pins to synchronously switch between active low and TRI-STATE. The OUT0 = LOW state occurs whenever the RF loop’s CP_8X
is selected HIGH while the FastLock bit is set HIGH (see programming description 3.2.2). The OUT0 pin reverts to TRI-STATE
when the CP_8X bit is LOW. Similarly for the IF loop, the synchronous activation of OUT1= LOW or TRI-STATE, is dependent on
whether the CP_GAIN_8 is high or low respectively (see programming description 3.1.4).
IF_N[20]
CMOS output
FastLock mode
4.5 SERIAL DATA INPUT TIMING
Note:
Data shifted into register on clock rising edge. Data is shifted in MSB first.
TEST CONDITIONS:
The Serial Data Input Timing is tested using a symmetrical waveform around Vcc/2. The test waveform has an edge rate of 0.6 V/nsec
with amplitudes of 2.2V
@
Vcc=2.7 V and 2.6V
@
Vcc = 5.5 V.
DS100831-3
www.national.com
17
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