Dear TI Team,
We developed a product based on CC430F6137 and attempted to build 4000 sets of them as a pilot run over last few weeks. Among the parts we build, we noticed that there were 93 PCS of them exhibited LCD display problem. Below is a description of the problem we observed for your reference.
1. Power up the device, CC430F6137 functions as expected and the LCD is turned on and shows correct information
2. While CC430F6137 is up and running, we tried to remove the system power to the device , and followed by applying power to device in succession, the LCD display suddenly switched off. Under this situation, we attempted to reset the device while keeping its power for multiple times , the LCD display kept on off state. What we expect is that the device should resume working after system reset.
3. While the system was pending in a state as described in step 2. We kept on removing and applying system power to the device, there was chance that the system resumed working again - the LCD display returns normal and the system operate as expected.
In summary, keep on applying and removing power to the device pushes a functional CC430F6137 device to a state where its LCD display was switched off and system stopped functioning. We suspected that the issue we are experiencing may due to improper hardware design. Would you please help revise our schematic design as below and give us some hints where we could go wrong? Thank you.
Best regards,
Peter
