S12 / MagniV MicrocontrollersのトピックMax stop current of S12ZVL

Max stop current of S12ZVL

leekate-b45752 — Wed, 09 Nov 2016 03:08:23 GMT

Hello,

Could you check the max stop current when API enabled & LINPHY in standby?

Thank you.

Best regards,

Kate Lee

Re: Max stop current of S12ZVL

iggi — Wed, 09 Nov 2016 14:48:59 GMT

Hello Kate,

This week i did some measurement on TRK-S12ZVL and DEVKIT-S12ZVL boards.

The measurements are rough as there are LED diodes on boards used as supply voltage indicators (3 on TRK; 1 on DEVKIT). As the LED diodes consumes several mAmps of current, it's quite hard to measure the current consumption in Stop mode. The problem is actually in boards, many connections around the MCU, not possible to find out where all the current flows.

From the measurement and calculations:

The TRK-S12ZVL board consumes little bit less than 1mA in Stop mode (API enabled) and around 6mA in Run mode (6.25MHz bus clock based on IRC; CPU executing couple of instructions continuously (_RESET_WATCHDOG(); function in CodeWarrior project))

The DEVKIT is similar, 1.17mA in Stop mode and 8.43mA in Run mode (API enabled and all GPIOs set as input and pulled-up).

The appropriate way to measure the current consumption in Stop mode would be to have a proto board (with ZIF socket for example) with just main supply pins connected to the MCU.

Regards,

iggi

Re: Max stop current of S12ZVL

iggi — Thu, 10 Nov 2016 16:18:12 GMT

We just found out that there is potentiometer R8=5KOhm on DEVKIT board connected to VDDX supply and ground. So it can take 1mA. What i can see when R8 is in max (or min) position, ampermeter shows 1.17mA in Stop mode, and when the R8 is min (or max) position, the ampermeter reads 1.11mA.

Anyway, colleague showed me this proto board:

I've ordered S12ZVL samples so i can build simple circuit and get MCU alive for testing purpose.

Also i just think of small boards demonstrating S12ZVL application (I could perform a test on one of these as well...):
S12ZVL LIN Ultrasonic Distance Measurement|NXP
S12ZVL LIN Enabled RGB LED Lighting Application|NXP

Regards,

iggi

Re: Max stop current of S12ZVL

leekate-b45752 — Mon, 14 Nov 2016 07:18:30 GMT

Hi Iggi,

Thank you for your detailed answers.

Summarized to your comments, it is about 70mA in stop mode for DEVKIT?

Best regards,

Kate Lee

Re: Max stop current of S12ZVL

iggi — Mon, 14 Nov 2016 10:03:19 GMT

70mA?

I hope you mean 70uA... But, still the DEVKIT board with S12ZVL more than 1mA in Stop mode and that's very rough measurement.