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EVK-M8T User Guide 

 

UBX-14041540 - R05 

Board layout

  

Page 15 of 22 

Early Production Information 

 

PART 

DESCRIPTION 

A1 

GPS RECEIVER U-BLOX NEO-M8T-0-00 -40/+85C 

BT1 

BATTERY HOLDER RENATA CR2450N 3V 

C1 C11 C13 C22 

CAP CER X5R 0603 1U0 10% 6.3V 

C2 C4 C6 C7 C8 C10 C14 C16 C19 

CAP CER X7R 0603 100N 10% 10V 

C3 C25 

CAP CER X5R 1210 10U 10% 10V 

C5 

CAP CER X7R 0402 1N0 10% 16V 

C9 C12 

CAP CER X7R 0603 10N 10% 25V 

C21 

CAP CER COG 0402 22P 5% 25V 

C24 

CAP CER X5R 0402 100N 10% 10V 

D1 D2 D4 D5 

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

D3 R17 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\xB0 2.54MM PITCH DISCONNECTABLE CRIMP CONNECTOR -40/+85C 

J6 

CON 1-ROW THT 100MIL GRID 2PINS 0.64MM SQUARE 6.1MM HEIGHT 

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 

R2 R6 R11 

RES THICK FILM CHIP 0603 100R 5% 0.1W 

R3 R8 R14 R15 R19 

VARISTOR BOURNS MLE SERIES CG0402MLE-18G 18V 

R4 R5 

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

R7 

RES THICK FILM CHIP 0603 1R0 5% 0.1W 

R9 R28 

RES THICK FILM CHIP 0603 51R 1% 0.063W 

R10 

RES THICK FILM CHIP 0402 220R 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 

R29 

RES THICK FILM CHIP 0603 1K0 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 U5 U9 

TINY LOGIC UHS BUFFER OE_N ACTIVE LOW FAIRCHILD NC7SZ125 SC70 

U6 

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

U7 

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

Table 6: EVB-M8T component list 

Содержание EVK-M8T-0-01

Страница 1: ...stract This document describes the structure and use of the EVK M8T evaluation kit and provides information for evaluating and testing u blox M8 positioning technology for timing and raw data applicat...

Страница 2: ...available at www u blox com under Support Product Resources Conformity Declaration u blox or third parties may hold intellectual property rights in the products names logos and designs included in th...

Страница 3: ...3 3 Serial port default configuration 6 4 Device description 7 4 1 Interface connection and measurement 7 4 2 Active antenna 7 4 3 Evaluation unit 7 4 3 1 Antenna connector 7 4 3 2 USB 7 4 3 3 UART 8...

Страница 4: ...ects Evaluation Kit Description Suitable for EVK M8T u blox M8 Timing GNSS Evaluation Kit NEO M8T LEA M8T Table 1 List of products supported by EVK M8T evaluation kit 1 2 Kit includes Evaluation unit...

Страница 5: ...nal limited power source only separated or Safety Extra Low Voltage SELV circuits are to be connected to the evaluation kit including interfaces and antennas For more information about SELV circuits s...

Страница 6: ...Set slide switch to I2C SPI I2C compliant DDC Connect corresponding pins see Table 5 for pin description Set slide switch accordingly to SPI or I2C Press the RST button after changing the switch 2 Th...

Страница 7: ...0 mA 4 3 Evaluation unit Figure 2 shows the front and the rear panel of the EVK M8T evaluation unit Front panel Rear panel Figure 2 EVK M8T evaluation unit front and rear panels 4 3 1 Antenna connecto...

Страница 8: ...n The RST button on the front panel resets the unit To avoid an inadvertent reset the button is recessed 4 3 5 Safe boot button This is used to set the unit in safe boot mode In this mode the receiver...

Страница 9: ...ction for over all current measurement see Figure 5 10 P2A O 3 0 V Battery output unloaded 100 1 resistor for battery backup current measurement to pin 9 P2B NOTE There is a current protection to 3 mA...

Страница 10: ...CR2450 The battery has a rated capacity of 540 mA The battery operating temperature range is 40 C to 85 C If the built in backup battery runs low or is empty after a long storage period purchase the b...

Страница 11: ...download 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...

Страница 12: ...e save configuration box in u center otherwise the configuration will be lost Communications to the evaluation kit must be via the UART I2C or SPI not USB The evaluation kit can be supplied via the US...

Страница 13: ...EVK M8T User Guide UBX 14041540 R05 Block diagram Page 13 of 22 Early Production Information 7 Block diagram Figure 5 EVK M8T block diagram...

Страница 14: ...ide UBX 14041540 R05 Board layout Page 14 of 22 Early Production Information 8 Board layout Figure 6 shows the EVK M8T board layout PCB Version B See Table 6 for the component list of the EVB Figure 6...

Страница 15: ...M PITCH DISCONNECTABLE CRIMP CONNECTOR 40 85C J6 CON 1 ROW THT 100MIL GRID 2PINS 0 64MM SQUARE 6 1MM HEIGHT L2 IND MURATA LQW15A 0402 120N 5 0 64A 55 125C Q1 MBT3906DW1T1G DUAL GENERAL PURPOSE TRANSIS...

Страница 16: ...EVK M8T User Guide UBX 14041540 R05 Schematic Page 16 of 22 Early Production Information 9 Schematic Figure 7 Schematic EVK M8T DNI TRUE in the schematic means Component not installed...

Страница 17: ...41540 R05 Battery replacement Page 17 of 22 Early Production Information 10 Battery replacement To replace the battery Number 5 in Figure 8 open the unit unscrew four screws on the front panel Figure...

Страница 18: ...le on your computer will show up in the COM port drop down list If a COM Port is gray another application running on this computer is using it The position is off by a few dozen meters u blox M8 GNSS...

Страница 19: ...ngs aren t good This provides safety as it is no longer possible to accidentally program a bad configuration e g disabling the main communication port The EVK M8T does not work properly when connected...

Страница 20: ...have 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...

Страница 21: ...ocumentation and to receive product change notifications register on our homepage www u blox com Revision history Revision Date Name Comments R01 07 Nov 2014 amil alnu Advance Information R02 07 Jan 2...

Страница 22: ...p u blox com 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 co...

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