u-blox EVK-M91-00-01, User Manual, Page: 6 / 27

EVK-M91 - User guide
2 Specifications
Parameter Specification
Serial interfaces
1 USB 2.0 Type C
1 UART, max baud rate 921600 Bd
RS-232 +/- 5 V level
14 pin – 3.0 V logic
1 I2C max 400 kHz
1 SPI – max SPI CLK 5.5 MHz, max data rate 1 Mbit/s
Timing interfaces 1 Time pulse output
Dimensions 105 x 64 x 26 mm
Power supply 5 V via USB or powered via external power supply pin 14
(V5_IN) and pin 1 (GND)
Normal operating temperature
-40 °C to +65 °C
Table 2: EVK-M91 specifications
2.1 Safety precautions
EVK-M91 must be supplied by a PS1 class limited power source. See section 6.2.2.4 of IEC
62368-1:2018 [
8 ] for more information on the PS1 class.
In addition to a limited power source, only ES1 class circuits are to be connected to the EVK-M91,
including interfaces and antennas. See section 5.2.1.1 of IEC 62368-1:2018 [
8 ] for more information
on the ES1 class.
UBX-19056858 - R04 2 Specifications Page 6 of 27
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