milindaj99

Hi @Paul, thank you for the detailed explanation and guidance. I did verify by measuring the voltage across PTB2, and indeed it is a weak voltage (around 0.1-0.2V) that drops to almost zero when I touch the multimeter leads. And it turns out...

Is the switch square or rectangular footprint? If square, is it installed in the correct orientation? You might want to check the switch datasheet for pinout contacts. Even more likely..., @PaulStoffregen detailed some very good points and...

Please check whether your boards were built with MKL02 chips purchased from PJRC. Also please check you have the T4 version and not the older version which implements Teensy3. PJRC always ships chip orders with a printed receipt that has the...

Your observation: 2. PTB2 is at 0V This is not good. The Program signal should be reading logic 1 when Program button is not pressed. You can observe this behavior with T4.0 and T4.1. Use an Ohm meter at the thru-holes near SD card signals...

Hi, you are right, PTB2 should ideally be HIGH after the MKL02 starts up. However on my board, it just stays LOW. The push button on my PCB is a normally OPEN switch, so it's not shorting the PTB2 signal to GND : )

Re posting the power up sequence from here: 6. 3.3V Power - The TLV75733P voltage regulator turns on, supplying the main3.3V power to the entire board. 7. DCDC_PSWITCH - After 3.3V is stable for several milliseconds, the MKL02chip drives...

Hi, thank you for your time and consideration : ) Yup, PTA3 is connected to DCDC_PSWITCH and AD_B0_11, it is a little tough to spot since the whole schematic is connected by net labels instead of wires. The 3.3V rail starts up up just fine -...

One weird thing I noticed when I searched the schematic is PTA1 is listed 4 times. This might be nothing but appears that the MKL02 chip on the schematic might be duplicated, one directly on top of the other. Does the PTA1 trace have any other...

Hi all, I have designed custom PCB that includes the Teensy 4.1 design on-board, replicated exactly as per the official Teensy 4.1 schematics. Upon receiving the custom boards, I noticed that there is no activity on the IMXRT1062 chip. After...