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参数资料
| 型号： | WI125 EVAL KIT |
| 厂商： | Connor-Winfield |
| 文件页数： | 6/18页 |
| 文件大小： | 0K |
| 描述： | GPS TIMING RECEIVER EVAL BOARD |
| 产品培训模块： | 125 Series GPS Based Timing and Synchronization Products |
| 标准包装： | 1 |
| 主要目的： | 计时，时钟发生器，同步器，GPS |
| 嵌入式： | 否 |
| 已用 IC / 零件： | WI125 |
| 主要属性： | 1PPS/ 10 MHz 相位校准功能 |
| 次要属性： | LED 状态指示器 |
| 已供物品： | 模块，板，天线，线缆，电源 |
| 其它名称： | CW681 W125 EVAL KIT |
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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