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| 型号： | WI125 EVAL KIT |
| 厂商： | Connor-Winfield |
| 文件页数： | 2/18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 10 of 20
Rev:
04
Date:
11/29/11
Copyright 2011 The Connor-Winfield Corp. All Rights Reserved
Specifications subject to change without notice
VBATT
Type:Power
Direction:Input/Output
Pin:27
TheBatteryBackupSupply.TheWi125hasanonboardRealTimeClock(RTC).Thisis
poweredfromtheVBATTsignal.Asupplyoftypically3v(greaterthan2.5Vandlessthan
DIG_3V3)shouldbeappliedtothissignal.Thissignalcanbeleftfloatingifnotrequired.
Theinputhasablockingdiodeandsorechargeablebatterieswillneedanexternalcharg-
ingcircuit.Typically,a1Kresisterinserieswiththissignalandtheexternalbatterywill
provideaneasymethodofmeasuringthecurrentconsumptionfromVBATTduringtest.
4.2 RF Signals
RF_IN
Type:RF
Direction:Input
Pin:24
TheRFInputSignal.ThisattachestotheGPSantenna.StandardRFdesignrulesmust
beusedwhentrackingtothissignal.ThissignalhasanRFblockedconnectiontothe
ANT_SUPPLYsignal.ThisisthesamesignalpresentedontheRFconnectoronthe
Wi125.Onlyoneantennaconnectionshouldbemade.IftheRFconnectoristobeused,
thenthereshouldbenoconnection,evenanunconnectedpad,tothiscastellation.
TRIM
Type:RF
Direction:Input
Pin:12
ThissignaltrimstheoutputfrequencyoftheVCTCXO.Thissignalisnormallyleftopen.
Whenfloating,thissignalisbiasedtothecontrolvoltageoftheVCTCXO.Anynoisein-
jectedintothissignalwillseverelycompromisetheperformanceoftheWi125.Thissignal
shouldonlybeusedinconjunctionwithspecificapplicationnotes.
EXT_CLK
Type:RF
Direction:Input
Pin:7
Thisinputistheexternalclockinput.Thissignalistobeusedonlyinspecialbuildsof
theWi125thatarenotfittedwithaninternalVCTCXO.Forthenormalbuild,containing
theVCTCXO,donotconnectthisinput.Theexternalclockisa9MHzto26MHzclipped
sinewaveinputwithanamplitudebetween1Vand3Vpeaktopeak.Thereturnpathfor
thissignalisRF_GND.
4.3 Emulation/Test Signals
TDI
Type:Test
Direction:Input
Pin:14
TheTestDataInSignal.ThisisthestandardJTAGtestdatainput.Thesignalreturnpath
isDIG_GND.
TDO
Type:Test
Direction:Output
Pin:13
TheTestDataOutSignal.ThisisthestandardJTAGtestdataoutput.Thesignalreturn
pathisDIG_GND.
TCK
Type:Test
Direction:Input
Pin:20
TheTestClockSignal.ThisisthestandardJTAGtestclockinput.Thesignalreturnpathis
DIG_GND.
4 SIGNAL DESCRIPTION continued
4.1 Power Signals cont’d
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