u-blox EVK-M8L, Руководство пользователя

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EVK-M8L User Guide
UBX-20028627 - R01 Specifications Page 6 of 33
C1-Public
2 Specifications
Parameter Specification
Serial interfaces 1 USB V2.0
1 RS232, max. 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
Speed Pulse interface Wheel tick: 3.3 V – 24 V logic
Forward / Reverse: 3.3 V – 24 V logic
Separate isolated vehicle GND connection for wheel tick and Forward/Reverse
signals.
Timing interface Time-pulse output
Dimensions 105 x 64 x 26 mm
Power supply 5 V via USB or external powered via extra power supply pin 14 (V5_IN) and common
supply/interface ground pin 13 (GND)
Normal Operating temperature -40 °C to +65 °C
Table 2: EVK-M8L specifications
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THE EVK CASE-WORK IS CONNECTED TO THE COMMON SUPPLY/INTERFACE GROUND PIN.
Contact u-blox technical support for assistance if required.
2.1 Safety precautions
EVK-M8L must be supplied by an external limited power source in compliance with clause 2.5 of the
standard IEC 60950-1. In addition to an external limited power source, only separated or Safety
Extra-Low Voltage (SELV) circuits are to be connected to the evaluation kit, including interfaces and
antennas.
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For more information about SELV circuits see section 2.2 in Safety standard IEC 60950-1 [7].
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CAUTION! IN THE UNLIKELY EVENT OF A FAILURE IN THE INTERNAL PROTECTION CIRCUITRY
THERE IS A RISK OF EXPLOSION WHEN CHARGING FULLY OR PARTIALLY DISCHARGED
BATTERIES. REPLACE THE BATTERY IF IT NO LONGER HAS SUFFICIENT CHARGE FOR UNIT
OPERATION. CHECK THE BATTERY BEFORE USING IF THE DEVICE HAS NOT BEEN OPERATED
FOR AN EXTENDED PERIOD OF TIME.