OptimusBlackSerial » History » Version 4
Paul Kocialkowski, 12/29/2015 02:47 PM
| 1 | 1 | Paul Kocialkowski | h1. Optimus Black (P970) serial |
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| 3 | 4 | Paul Kocialkowski | The Optimus Black (P970) allows accessing an UART serial port through the USB connector. A MAX14526 MUIC is in charge of switching between the USB and UART lines. The UART line can be muxed either to the main processor's debug UART (*UART3*), to the modem's UART or to the modem's USB lines via a FSUSB63 DP3T switch. The modem's UART line can also be switched directly to the main processor via an analog switch. |
| 4 | 1 | Paul Kocialkowski | |
| 5 | Thus, a working configuration to access the serial port through the USB connector is to route the USB connector to the UART line with the MAX14526 MUIC and to route the UART line to the main processor's debug UART (UART3) with the FSUSB63 DP3T switch. |
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| 6 | 2 | Paul Kocialkowski | |
| 7 | Block diagram of the USB and UART connection: |
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| 8 | 1 | Paul Kocialkowski | !p970_usb_mux.jpg! |
| 9 | 4 | Paul Kocialkowski | |
| 10 | h3. References |
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| 12 | * Optimus Black (P970) Service Manual and Schematics: http://www.cpkb.org/wiki/LG_P970_Optimus_Black_service_manual |
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| 13 | * OMAP36xx Technical Reference Manual: "swpu177aa.pdf":http://www.ti.com/lit/pdf/swpu177 |
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| 15 | *These documents are the propriety of LG Electronics and Texas Instruments and are not hosted by the Replicant project.* |