3 ms·
Wow really? Do you have a source on that?
by chrisshroba 5y ago
Wow really? Do you have a source on that?
- magicalhippo 5y agoSeveral such "motion chips" have onboard motion processing. As a random example the MPU-9250[1], a 9-DOF IMU, has a low-power pedometer feature which can keep step count while host processor sleeps or is offline. [1]: https://product.tdk.com/en/search/sensor/mortion-inertial/imu/info?part_no=MPU-9250 https://product.tdk.com/en/search/sensor/mortion-inertial/im...
- floatboth 5y agoEven without onboard processing it's a very obvious move to offload it to a tiny microcontroller. Apple actually started by using a physically separate NXP micro that they branded "M7". Now it is of course on the main chip, but still a separate Cortex-M core.
- jtbayly 5y agoThis is old. Could have changed since then, but here you go: https://www.dailymail.co.uk/sciencetech/article-2573761/amp/Apple-track-AFTER-iPhone-battery-dies-Sensors-continue-collect-data-phone-dead.html https://www.dailymail.co.uk/sciencetech/article-2573761/amp/...