S32R274RRUEVB startup

[qiyuan]

Hi,

I just got my S32R274RRUEVB board from NXP.

There are 3 power supply terminals on this board, do I have to connect them all to power up this daughter board alone as I don't have the motherboard? they are:

5V_DC_R

3.3V_DC_R

1.25V_DC_R

From the schematic, it looks like 1.25V can be internally supplied thru 5V_DC_R, what about the 3.3V_SR_LDO? can I just supply a single 5V supply externally to power up the board to do some simple test?

Is there any user manual to start with?

Thanks!

[PetrS]

Hi,

It is possible to use the daughter cards without the motherboard to run code on the microcontroller.

Power to the daughter cards must be supplied through the terminal power connector ‘J1 – PWR_IN’. It

is required to connect all three voltages (1.25V, 3.3V and 5V) and ground. 

Jumpers positions must be moved to allow the J1 to supply the EVB.  

J3 must move to position 1-2   (5V_DC_R)

J2 must move to position 1-2   (1.25V_DC_R)

J7 must move to position 1-2   (5V_DC_R)

J5 must move to position 1-2   (3.3V_DC_R)

J4 must move to position 1-2   (5V_DC_R)

BR, Petr

[qiyuan]

Hi Petr,

Thanks for your reply and comments.

For my test bench, I have 5V and 3.3V regulated DC supply only, I noticed

there is a on board SMPS FET on the S32R274RRUEVB schematic that supplies

1.25V core supply for the micro, my question is if I can use this on board

SMPS and negate the 1.25V_DC_R from the J1-PWR_IN connector. if yes, how

should I configure the jumpers accordingly.

Thanks!

Qi Yuan