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參數(shù)資料
| 型號(hào)： | LMX2330ATMX |
| 英文描述： | Serial-Input Frequency Synthesizer |
| 中文描述： | 串行輸入頻率合成器 |
| 文件頁(yè)數(shù)： | 10/19頁(yè) |
| 文件大?。?/td> | 362K |
| 代理商： | LMX2330ATMX |
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1.0 Functional Description
(Continued)
1.3.1 POWERDOWN OPERATION
Bits F[2] and F[18] provide programmable powerdown modes when the CE pin is HIGH. When CE is LOW, the part is always im-
mediately disabled regardless of powerdown bit status. Refer to Table 3
Synchronous and asynchronous powerdown modes are both available by MICROWIRE selection. Synchronous powerdown oc-
curs if the F[18] bit (Powerdown Mode) is HIGH when F[2] bit (Powerdown) becomes HIGH. Asynchronous powerdown occurs
if the F[18] bit is LOW when its F[2] bit becomes HIGH.
In the synchronous powerdown mode (F[18] = HIGH), the powerdown function is gated by the charge pump to prevent unwanted
frequency jumps. Once the powerdown program bit F[2] is loaded, the part will go into powerdown mode after the first successive
charge pump event.
In the asynchronous powerdown mode (F[18] = LOW), the device powers down immediately after latching LOW data into bit F[2].
The device returns to an actively powered up condition in either synchronous or asynchronous mode immediately upon LE latch-
ing LOW data into bit F[2].
Activation of a powerdown condition in either synchronous or asynchronous mode including CE pin activated powerdown has the
following effects:
Removes all active DC current paths.
Forces the R, N, and timeout counters to their load state
conditions.
Will TRI-STATE the charge pump.
Resets the digital lock detect circuitry.
Debiases the f
IN
input to a high impedance state.
Disables the oscillator input buffer circuitry.
The MICROWIRE control register remains active and ca-
pable of loading the data.
TABLE 3. Power Down Truth Table
CE(Pin 10)
F[2]
X
0
1
1
F[18]
X
X
0
1
Mode
LOW
HIGH
HIGH
HIGH
Asynchronous Power Down
Normal Operation
Asynchronous Power Down
Synchronous Power Down
TABLE 4. The Fo/LD (pin 14) Output Truth Table
F[3]
0
0
0
0
1
1
F[4]
0
0
1
1
0
0
F[5]
0
1
0
1
0
1
Fo/LD Output State
TRI-STATE
R Divider Output (fr)
N Divider Output (fp)
Serial Data Output
Digital Lock Detect (See 1.3.2 LOCK DETECT OUTPUT Section)
n Channel Open Drain Lock Detect (See 1.3.2 LOCK DETECT OUTPUT
Section)
Active HIGH
Active LOW
1
1
1
1
0
1
L
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相關(guān)代理商/技術(shù)參數(shù) |
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| LMX2330L | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:PLLatinum⑩ Low Power Dual Frequency Synthesizer for RF Personal Communications |
| LMX2330LEVAL | 功能描述:BOARD EVALUATION LMX2330L RoHS:否 類別:編程器，開發(fā)系統(tǒng) >> 過(guò)時(shí)/停產(chǎn)零件編號(hào) 系列:PLLatinum™ 標(biāo)準(zhǔn)包裝:1 系列:- 傳感器類型:CMOS 成像，彩色（RGB） 傳感范圍:WVGA 接口:I²C 靈敏度:60 fps 電源電壓:5.7 V ~ 6.3 V 嵌入式:否 已供物品:成像器板 已用 IC / 零件:KAC-00401 相關(guān)產(chǎn)品:4H2099-ND - SENSOR IMAGE WVGA COLOR 48-PQFP4H2094-ND - SENSOR IMAGE WVGA MONO 48-PQFP |
| LMX2330LSBX | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:PLLatinumTM Low Power Dual Frequency Synthesizer for RF Personal Communications |
| LMX2330LSLB | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:PLLatinum⑩ Low Power Dual Frequency Synthesizer for RF Personal Communications |
| LMX2330LSLBX | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Serial-Input Frequency Synthesizer |
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