background image

EVK-M8U User Guide 

 

UBX-15023994 - R01

 

Advance Information

 

Board layout

 

 

 

Page 19 of 26

 

 

PART 

DESCRIPTION 

A1 

GNSS RECEIVER -40/+85C  

BT1 

BATTERY HOLDER RENATA CR2450N 3V 

C1 C11 C13 C22 

CAP CER X5R 0603 1U0 10% 6.3V 

C10 C14 C16 C19 C2 C6 C7 C8 

CAP CER X7R 0603 100N 10% 10V 

C12 C9 

CAP CER X7R 0603 10N 10% 25V 

C20 

CAP CER COG 0402 1P8 +/-0.1P 25V 

C21 

CAP CER COG 0402 22P 5% 25V 

C23 

CAP CER COG 0402 47P 5% 25V 

C24 

CAP CER X5R 0402 100N 10% 10V 

C25 C3 

CAP CER X5R 1210 10U 10% 10V 

C4 

CAP CER X7R 0603 1N0 10% 25V 

C5 

CAP CER X7R 0402 1N0 10% 16V 

D1 D2 D4 D5 

SURFACE MOUNT SCHOTTKY BARRIER RECTIFIER SS14 1A -55/+125C 

D3 R18 R20 R21 R22 R23 

ESD PROTECTION FOR HIGH SPEED LINES, TYCO, 0.25PF, PESD0402-140 -55/+125C 

DS1 

LED OSRAM HYPER MINI TOPLED LB M673-L1N2-35 BLUE 0.02A 

FB1 

FERRITE BEAD MURATA BLM15HD 0402 1000R@100MHZ 

J1 

CON USB RECEPTACLE MICRO B TYPE SMD – MOLEX 47346-0001 – TID60001597 30V 1A 

J2 

CON SMA SMD STRAIGHT JACK 11.4MM HEIGHT WITHOUT WASHER AND NUT 

J3 

9 POLE SUBD CONNECTOR FEMALE 

J4 

14PIN 90° 2.54MM PITCH DISCONNECTABLE CRIMP CONNECTOR -40/+85C 

L1 

IND MURATA LQW15A 0402 8N7 3% 0.54A -55/+125C 

L2 

IND MURATA LQW15A 0402 120N 5% 0.64A -55/+125C 

Q1 

MBT3906DW1T1G DUAL GENERAL PURPOSE TRANSISTOR 0.2A 0.15W -40/+125C 

R1 

RES THICK FILM CHIP 1206 10R 5% 0.25W 

R10 

RES THICK FILM CHIP 0402 220R 5% 0.1W 

R11 R2 R6 

RES THICK FILM CHIP 0603 100R 5% 0.1W 

R12 

RES THICK FILM CHIP 0402 2K2 5% 0.1W 

R13 R24 R27 

RES THICK FILM CHIP 0603 100K 5% 0.1W 

R14 R15 R19 R3 R8 

VARISTOR BOURNS MLE SERIES CG0402MLE-18G 18V 

R29 

RES THICK FILM CHIP 0603 1K0 5% 0.1W 

R47 R48 R49 R50 

RES THICK FILM CHIP 0402 0R 0 0.1W 

R4 R5 

RES THICK FILM CHIP 0603 22R 5% 0.1W -55/+125C 

R7 

RES THICK FILM CHIP 0603 1R0 5% 0.1W 

S1 S2 

SWITCH SPST ON 1POL TYCO -40/+85C 

S3 

2 WAY SUB-MINIATURE SLIDE SWITCH SMD JS SERIES – SPDT -40/+85C 

U1 

USB DATA LINE PROTECTION ST USBLC6-2SC6 SOT23-6 

U2 U4 

LOW DROPOUT REGULATOR LINEAR LT1962 MS8 3.3V 0.3A 

U3 U9 

TINY LOGIC UHS BUFFER OE_N ACTIVE LOW FAIRCHILD NC7SZ125 SC70 

U5 

LOW NOISE AMPLIFIER GAAS MMIC 1.575 GHZ 1.5V-3.6V JRC EPFFP6-A2 3.6V -40/+85C 

U6 

RS-232 TRANSCEIVER 1MBIT 3-5,5VOLT TRSF3223 – VQFN20 5.5V  -40/+85C 

U7 

TINY LOGIC ULP-A 2-INPUT AND GATE 1.45X1.0 6-LEAD MICROPAK -40/+85C 

Table 6: EVK-M8U component list 

Summary of Contents for EVK-M8U

Page 1: ...Abstract This document describes the structure and use of the EVK M8U evaluation kit and provides information for evaluating and testing u blox M8 Untethered Dead Reckoning UDR positioning technology...

Page 2: ...e following products Product name Type number Hardware Version ROM FLASH version PCN reference EVK M8U EVK M8U 0 00 D Flash FW 3 01 UDR 1 00 N A u blox reserves all rights to this document and the inf...

Page 3: ...ings and certifications CAUTION IN THE UNLIKELY EVENT OF A FAILURE IN THE INTERNAL PROTECTION CIRCUITRY THERE IS A RISK OF AN EXPLOSION WHEN CHARGING FULLY OR PARTIALLY DISCHARGED BATTERIES REPLACE TH...

Page 4: ...ation unit 8 3 3 1 Antenna connector 8 3 3 2 USB 9 3 3 3 UART 9 3 3 4 RST button 9 3 3 5 Safe boot button 9 3 3 6 Slide Switch 9 3 3 7 Front test Connector 10 3 3 8 LED 10 3 3 9 Backup Battery 10 3 3...

Page 5: ...R01 Advance Information Contents Page 5 of 26 7 Block diagram 17 8 Board layout 18 9 Schematic 20 10 Battery replacement 21 11 Troubleshooting 22 12 Common evaluation pitfalls 24 Related documents 25...

Page 6: ...List of products supported by EVK M8U evaluation kit 1 2 Kit includes Evaluation unit USB cable Active GPS GLONASS BeiDou antenna with 3 m cable Extra Battery RENATA CR2450 Quick Start card 1 3 Evalu...

Page 7: ...baud rate 921 6 kBd DB9 12 V level 14 pin 3 3 V logic 1 DDC I2C compatible max 400 kHz 1 SPI clock signal max 5 5 MHz SPI DATA max 1 Mbit s Dimensions 105 x 64 x 26 mm Power Supply 5V via USB or exter...

Page 8: ...tive antennas is 30 mA 3 3 Evaluation unit Figure 2 shows the front and the rear panel of the EVK M8U evaluation unit Front panel Rear panel Figure 2 EVK M8U evaluation unit front and rear panels 3 3...

Page 9: ...ton is recessed 3 3 5 Safe boot button This is used to set the unit in safe boot mode In this mode the receiver executes only the minimal functionality such as updating new firmware into the SQI flash...

Page 10: ...ESERVED0 Not connected 7 EXTIN0 I 3 3 V External interrupt input 6 RESERVED1 Not connected 5 SDA CS I O 3 3 V If slide switch on I2C then DDC interface selected Function data input output If slide swi...

Page 11: ...for best performance attach it on the roof as shown in Figure 33 Bring the antenna cable in through the window or door Be careful not to damage the antenna cable 4 1 2 Mounting the EVK M8U The EVK M8...

Page 12: ...navigation performance the recommended configuration is as follows Navigation Rate The default DR GNSS fused navigation solution update rate of 1 Hz is recommended You can set the navigation update r...

Page 13: ...ion mode and starts to compute combined GNSS Dead reckoning fixes and to calibrate the sensor required for computing the fused navigation solution The sensor calibration status outputs CALIBRATING see...

Page 14: ...ch as an empty open sky parking area provides good conditions The initialization and calibration drive should contain phases where the car is stopped during a few minutes with engine turned on phases...

Page 15: ...recommend recording and archiving the data of your test drives You can enable additional debug messages by clicking the Debug button and then clicking the Record button see Figure 7 When prompted to...

Page 16: ...d all the Aiding Data via the AssistNow Online service 3 Read the voltage and average if necessary on the voltmeter and convert to current 1 mV equals 1 mA 4 Perform the test with good signals and cle...

Page 17: ...EVK M8U User Guide UBX 15023994 R01 Advance Information Block diagram Page 17 of 26 7 Block diagram Figure 10 EVK M8U block diagram...

Page 18: ...Guide UBX 15023994 R01 Advance Information Board layout Page 18 of 26 8 Board layout Figure 11 shows the EVK M8U board layout PCB Version D See Table 6 for the component list of the EVB Figure 11 EVK...

Page 19: ...PITCH DISCONNECTABLE CRIMP CONNECTOR 40 85C L1 IND MURATA LQW15A 0402 8N7 3 0 54A 55 125C L2 IND MURATA LQW15A 0402 120N 5 0 64A 55 125C Q1 MBT3906DW1T1G DUAL GENERAL PURPOSE TRANSISTOR 0 2A 0 15W 40...

Page 20: ...UBX 15023994 R01 Advance Information 9 Schematic Figure 12 Schematic EVK M8U DNI TRUE in the schematic means Component not installed...

Page 21: ...UBX 15023994 R01 Advance Information 10 Battery replacement To replace the battery Number 5 in Figure 13 open the unit unscrew four screws on the front panel Figure 13 EVK M8U battery location...

Page 22: ...n is inaccurate by a few dozen meters u blox M8 GNSS technology starts up with the WGS84 standard GNSS datum If your application expects a different datum you ll most likely find the positions to be o...

Page 23: ...ing the main communication port The EVK M8U does not work properly when connected with a GNSS simulator When using an EVK together with a GNSS simulator pay attention to proper handling of the EVK A G...

Page 24: ...e an impact on signal travel time The position of the GNSS receiver is typically not the same between two tests Comparative tests should therefore be conducted in parallel by using one antenna and a s...

Page 25: ...ual Docu No UBX 15016700 3 u blox 8 M8 Receiver Description including Protocol Specification Docu No UBX 13003221 4 u center User Guide Docu No UBX 13005250 For regular updates to u blox documentation...

Page 26: ...Regional Office China Beijing Phone 86 10 68 133 545 E mail info_cn u blox com Support support_cn u blox com Regional Office China Chongqing Phone 86 23 6815 1588 E mail info_cn u blox com Support su...

Page 27: ...D5821AEBZ EVAL AD7175 8SDZ EVAL AD7262EDZ EVAL AD7265EDZ EVAL AD7366SDZ EVAL AD7634EDZ EVAL AD7641EDZ EVAL AD7655EDZ EVAL AD7674EDZ EVAL AD7705EBZ EVAL AD7718EBZ EVAL AD7719EBZ EVAL AD7730LEBZ EVAL AD...

Reviews: