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參數(shù)資料
| 型號： | WI125 |
| 廠商： | Connor-Winfield |
| 文件頁數(shù)： | 6/18頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC GPS TIMING RECEIVER-OEM SMT |
| 產(chǎn)品培訓模塊： | 125 Series GPS Based Timing and Synchronization Products |
| 特色產(chǎn)品： | Wi125 GPS Timing Receiver |
| 標準包裝： | 1 |
| 類型： | 定時模塊，系統(tǒng)時鐘 |
| PLL： | 無 |
| 主要目的： | GPS，WiMax |
| 輸入： | 時鐘 |
| 輸出： | 時鐘 |
| 電路數(shù)： | 1 |
| 比率 - 輸入:輸出： | 1:2 |
| 差分 - 輸入:輸出： | 無/無 |
| 頻率 - 最大： | 10MHz |
| 電源電壓： | 1.65 V ~ 3.6 V |
| 工作溫度： | -30°C ~ 85°C |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 42-QFN |
| 包裝： | 散裝 |
| 其它名稱： | CW680 W125 |
Wi125 Data Sheet #:
SG170
Page 14 of 20
Rev:
04
Date:
11/29/11
Copyright 2011 The Connor-Winfield Corp. All Rights Reserved
Specifications subject to change without notice
4 SIGNAL DESCRIPTION continued
4.5 I/O Signals cont’d
GPIO[2]/NEXT_INT
Type:I/O
Direction:Input/Output
Pin:41
TheGPIO[2]/NEXT_INToutputprovidesanactivehighstatusindicatorfortheFrequency
Outputavailableonpin39(GPIO[0]/PWM).Customsoftwareversionscanalsoconfigure
thispinforgeneralpurposeI/O.ThesignalreturnpathisDIG_GND.
GPIO[3]/FREQ_IN
Type:I/O
Direction:Input/Output
Pin:42
TheGPIO[3]/FREQ_INoutputprovidesanactivehighstatus3Dfixindicator.Thisindi-
catorcanalsobeusedtodeterminethevalidityofthepin38(1PPS)output.Thesignal
returnpathisDIG_GND.
5 SPECIAL FEATURES
WhilemostofthefeaturesontheWi125arejustasubsetofthecapabilitiesoftheWi125andsoaredescribedin
theWi125DataSheetandtheWi125UserManual,therearesomeadditionalfeaturesspecifictotheWi125that
requireexplanation.
5.1 User Commands
TheWi125canacceptanumberofspecificusercommandsforsettingreceiverparameterssuchasUARTbaud
rateandNMEAmessagesubset,outputfrequency,etc.ManyoftheseparametersarestoredinNon-Volatile
Memory(NVM)sothatthesettingsareretainedwhenthereceiverlosespower.Theavailablecommandsare
definedindetailintheWi125UserManual.
5.2 Self Survey
Tooptimizetimingperformance,theWi125performsa10-minutesurveyeachtimethereceiverispoweredup
andafterobtainingaGPSfix.Whenthesurveyiscomplete,thereceiverautomaticallyentersfixedtimingmode.
Forapplicationswithspecifictimingperformancerequirements,itmaybenecessarytoallowthesurveytocom-
pletebeforeusingthe1PPSandfrequencyoutputs.Thestatusofthesurveycanbedeterminedbyqueryingthe
receiverdynamicssettingasdescribedintheWi125UserManual.
5.3 Wi125 Embedded Identification
ThehardwareversionnumberishardcodedontotheWi125;firmwarealsocontainsaversionnumberallowingfor
easyidentificationofthehardwareandsoftwareversioninembeddedapplications.
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