• State
  • Locked Locked
  • Replies 0 replies
  • Subscribers 77 subscribers
  • Views 275 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.

MSP doesn't start when usb is connected

Mikolaj Filar
Expert 1550 points
Other Parts Discussed in Thread: MSP430F5510

Hello,

I created a MSP430F5510 Experimenter Board for testing my applications.

There is an USB module:

Jumper isn't used.

I had a problem to run USB CDC example and in other thread (http://e2e.ti.com/support/microcontrollers/msp43016-bit_ultra-low_power_mcus/f/166/t/201314.aspx) I got suggestion:

TonyKao said:

There is an errata for the MSP430F5510 LDO where sometimes the device can fail to detect the 5V VBUS; unfortunately the "fix" in the USB package involves cycling the LDO, which is catastrophic for bus-powered devices relying on the LDO as it means an endless reset loop. If this is the case try commenting out USBPWRCTL = 0; in USB_Init().

After it it's fine but when USB is connected before MSP is turning on MCU doesn't start. Is it my design mistake or maybe is it a result of this "bug"?

I can live with that but I would like to know how to avoid this issue in the future projects if it's possible.

Best regards,

Mikolaj

**Attention** This is a public forum