Peripheral Interface: Difference between revisions
PI_BB_GPIO: RTC info
(PI_BB_GPIO: Fix LED Control description and add some details) |
(PI_BB_GPIO: RTC info) |
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| 5 | LED Mask | Enables the LED bit line. If left off, changes to LED Control will do nothing.
| 4 | Power Mask | Enables the power control bit line. If left off, changes to Power Control will do nothing.
| 3-2 | RTC Control | RTC communication happens through these bits. The communication protocol is described in the [https://www.st.com/content/ccc/resource/technical/document/datasheet/19/24/95/e2/85/6a/47/30/CD00003139.pdf/files/CD00003139.pdf/jcr:content/translations/en.CD00003139.pdf ST M41T0 Serial RTC datasheet]; the lower bit is the clock line while the upper bit is the data line.
| 1 | LED Control | If 0, the LED on the front of the player will light up. If 1, the LED will switch off.
| 0 | Power Control | If 1, the power will remain on. If 0, the device will power off.
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