Auvidea M100, Technical Reference Manual

Page: 10 / 18

VERSION 1.2 M90, M100, M100
Outputs (GPIOs, I2S, SPI) on the M100
The M100 converts the 1.8V level output signals to 3.3V. It uses a bidirectional level converter, which
automatically detects the direction of the signal. For the level conversion to work properly, caution must be
taken, if there is a pull-up resistor on any output. This applies to all outputs including GPIOs and special
function outputs like SPI, I2S. If there are any pull-up resistors on these outputs, they must have more than 50
kOhm. If there is a pull-up resistor with a lower value, than the level converter may determine that the signal
is driven from the outside, and that this pin should be treated as input.
LEDs
The 12V power LED will light up as soon as the power is connected to the M100, independent of whether a
J100/J106 is plugged in. The 2 on-board DC converters only power up if a J100 or J106 is plugged in.
Buttons
UART 1 (J7)
This is a TTL level (3.3V) UART port of the TX1/2. The 2 pins are passed through a bi-directional level
converter with 3.3V level outputs (TXB0104PWR) and through 33 Ohm series resistors (in a tiny 0804 size
resistor array).
USB 2.0 (J17)
USB 2.0 port for firmware upgrades and for USB 2.0 devices like mouse and keyboard.
LED Description
12V input power LED
5V on-board 5V 3A DC converter is powered up (J100/J106 required)
3.3V SATA on-board 3.3V 3A DC converter is powered up (J100/J106 required)
USB/UART1 over current on the 5V supply of the USB2 or UART1 port
CAN2 over current on the 5V supply of the CAN2 port
CAN1 over current on the 5V supply of the CAN1 port
Button Function
J1 Reset
J2 Power up
J5 Force Recovery (for firmware upgrade)
Pin Function Jetson TX1 GPIO Description
1 5V - - 5V power output (same as USB 2.0 - J17)
2 UART1_TXD D9 - UART 1 port (3.3V TTL level): transmit data output
3 UART1_RXD D10 - UART 1 port (3.3V TTL level): receive data input
6 GND - - Ground
AUVIDEA GMBH TECHNICAL REFERENCE MANUAL 10