Hi Team,
We are currently working on the MIMXRT700 EVK and need clarification regarding battery connection and external board power-up.
We observed that the PMIC IC has a VBAT input, but we are unable to identify the exact connector/header on the EVK where a battery can be connected directly.
Could you please help us with the following:
Please point us to the official battery connector/header available on the RT700 EVK.
Exact connector/header location on the board
Supported battery type/specification
Recommended connector/part number
We would also like to understand the correct procedure to power up the RT700 EVK using an external power adapter while still supporting flashing and debugging.
Currently, we are powering and debugging the board through the USB debug port. We want to know:
What changes/setup are required when powering the board externally for battery and adapter
Whether flashing and debugging through USB/J-Link will continue to work in this setup.
Thanks & Regards,
Suhas
Hi @suhas1503 ,
Thanks for your interest in NXP MIMXRT series!
The PMIC supports battery power, but on the EVK, it is set to DNP by default. You can locate J37 on the schematic.
A detailed description can be found in the “MIMXRT700-EVK Board User Manual[UM12188]”. Please take a look.
For the RT700, there is no specific requirement regarding the choice of battery for the PMIC; you can select one based on the PCA9422 datasheet.
In addition, the RT700-EVK supports powered by an external power adapter and supports a 5V power supply. It is connected via J45, and the power source is selected by shorting pins 1 and 2 on J2. The details is in “MIMXRT700-EVK Board User Manual[UM12188]” Section 2.2 .
The on-board debugger continues to function normally when powered by an external power source.
Best regards,
Gavin
Hi,
I am using the MIMXRT700-EVK with a Murata 2EL M.2 module connected to the M.2 socket on the RT700-EVK.
I am testing different examples from the MCUXpresso SDK.
Hardware setup:
- Board: MIMXRT700-EVK
- M.2 module: Murata 2EL M.2 module
- Murata 2EL module is connected to the M.2 socket
- Power is supplied through JP37 using a battery
- MCUXpresso SDK: SDK_26_03_00_MIMXRT700-EVK
Observed behavior:
When the RT700-EVK is powered through JP37 using a battery:
1. The hello_world example works correctly.
2. The xaf_record example works correctly.
3. The edgefast_bluetooth_examples/peripheral_ht example builds and flashes successfully, but the application fails during runtime initialization.
The UART log is:
BLE Peripheral HT demo start...
[sdio] Error: Card initialization failed
[wifi_io] Error: SDIO driver init failed.
ASSERT ERROR " API_SUCCESS == result ":
file "middleware/wireless/ethermind/port/pal/mcux/bluetooth/controller/controller_wifi_nxp.c"
Line "120"
However, when I use the same edgefast_bluetooth_examples/peripheral_ht example with the J54 USB debug port and J45 port with the adapter, the example works correctly.
Therefore, the EdgeFast Bluetooth example works correctly with the J54/J45 configuration but fails when the board is powered through JP37 using a battery.
The hello_world and xaf_record examples work correctly with the JP37 battery configuration.
Expected behavior:
I expect the edgefast_bluetooth_examples/peripheral_ht example to initialize the Bluetooth controller successfully when the RT700-EVK is powered through JP37 using a battery and the Murata 2EL M.2 module is connected.
Questions:
1. Is the JP37 power configuration supported for running the EdgeFast Bluetooth examples with the Murata 2EL M.2 module?
2. Does the Murata 2EL M.2 module require any additional jumper, switch, or power configuration when JP37 is used with a battery?
3. Why does the application report the following errors when using the JP37 battery configuration?
[sdio] Error: Card initialization failed
[wifi_io] Error: SDIO driver init failed.
4. Is there any required power sequencing or M.2 power-enable configuration for the wireless module when using battery power through JP37?
5. Is there a recommended RT700-EVK jumper and power configuration for using the Murata 2EL M.2 module with the EdgeFast Bluetooth examples and battery power?
Please let me know if you need any additional information, such as the complete UART log, jumper configuration, SDK configuration, schematic details, or power measurements.
Thank you.