Table 7. J1004 pin definition
No.
Net name
Description
1/2
VDD_3V3
Power Output, 3.3 V
3/4
I2C3_SCL_3V3
I2C clock signal
5/6
I2C3_SDA_3V3
I2C data signal
7/8
GND
Ground
2.19 User interface buttons
There are two user interface buttons on the EVKB board.
2.19.1 Power button (SW901)
The i.MX 8M Mini Applications Processor supports the use of a button input signal to request main SoC power state changes (i.e.
ON or OFF) from the PMU.
The ON/OFF button can be used for debounce, OFF-to-ON time, and max timeout. Debounce is used to generate the power-off
interrupt. In the ON state, if the ON/OFF button is held longer than the debounce time, the power-off interrupt is generated. In the
OFF state, if the ON/OFF button is held longer than the OFF-to-ON time, the state will transit from OFF to ON. Max timeout can
also be the time for requesting physical power down after the ON/OFF button has been held for the defined time.
2.19.2 Reset button (SW902)
The RESET button (SW902) is directly connected to the PMIC PCA9450A. Holding the RESET button will force to reset the PMIC
power outputs except
NVCC_SNVS_1V8
and
VDD_SNVS_0V8
on the EVKB board. The i.MX 8M Mini applications processor will be
immediately turned off and reinitiate a boot cycle from the OFF state.
2.20 User interface LED indicators
There are four LED indicators on the board. These LEDs have the following functions:
• Main Power Supply (D708)
— Green: The board is powered on.
— OFF: The board is powered off.
• System Status (D1) on 8MMINILPD4-CPU2
— Green Blinking: CPU is running well.
— OFF: CPU is not running.
• M4 UART (D902/D903)
— D902 Green light flashing: The UART data transmitted to PC.
— D903 Orange light flashing: The UART data received from PC.
• A53 UART (D906/D905)
— D906 Green light flashing: The UART data transmitted to PC.
— D905 Orange light flashing: The UART data received from PC.
NXP Semiconductors
Specifications
i.MX 8M Mini LPDDR4 EVKB Board Hardware User's Guide, Rev. 0, February 18, 2021
User's Guide
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