• State Resolved
  • Locked Locked
  • Replies 2 replies
  • Subscribers 79 subscribers
  • Views 1342 views
  • Users 0 members are here
Support feedback
Options
Options
Related

This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

Maximum output current from MSP430F5335 BGA pin/port

Nirke
Intellectual 750 points
Other Parts Discussed in Thread: MSP430F5335

Hey there,

We are using MSP430F5335 BGA package and would like to know whether can we turn on LEDs straight from the MSP output pins (instead of switching the battery voltage through transistors).

Is there any maximal allowed output current per pin?

Is there any maximal allowed output current per port?

If we draw more than the maximal current, will it damage the MCU, or will it just cause the MCU output voltage to drop at that pin?

With a rough estimation we saw that a LED consumes about 12mA and we suspect it may be too high...

We would appreciate your help.

Thanks,

Nir

  • 0
    Guru 318740 points

    See page 46 of the datasheet.
    With VCC=3V, when you have configured a pin for full drive strength, you can get 15 mA with a guaranteed voltage drop of no more than 0.6 V. (There is a 100 mA limit for the entire chip, but only regarding the voltage drop guarantee.)

    There are no recommended or absolute limits for the current, and page 49 shows voltage drops over the entire voltage range, so it appears that large currents do not affect the rest of the chip (much).

**Attention** This is a public forum