GalaxyTabSerial » History » Version 10
Denis 'GNUtoo' Carikli, 03/03/2021 01:01 PM
I've tested the UART and it prints the bootloader logs (it looks similar to the logs from the one on] the Galaxy Nexus)
| 1 | 1 | Denis 'GNUtoo' Carikli | h1. GalaxyTabSerial |
|---|---|---|---|
| 2 | |||
| 3 | {{toc}} |
||
| 4 | |||
| 5 | 5 | Denis 'GNUtoo' Carikli | h2. Introduction |
| 6 | |||
| 7 | The Galaxy Tab and Galaxy Tab 2 tablets have a custom 30 pin connector. |
||
| 8 | |||
| 9 | The goal is to get access to the SOC UART to interact with the bootloader, get kernel boot logs, etc. |
||
| 10 | |||
| 11 | To make it easier we want to reuse existing cables without much modifications to the cables. |
||
| 12 | |||
| 13 | While this is being tested on the Galaxy Tab 2, it should also work on the Galaxy Tab. |
||
| 14 | |||
| 15 | 2 | Denis 'GNUtoo' Carikli | h2. Movitelonline "Cable UART Dual Samsung Galaxy Tab P1000 / Tab 2 / Note / Note 2 [RJ45 + USB]" |
| 16 | 1 | Denis 'GNUtoo' Carikli | |
| 17 | *link*: "shop page":https://www.movitelonline.com/b2c/producto/RJ45-USB-UNIBOX-CABLE-SAMSUNG-GALAXY-TAB-GT-P1000/1/cable-uart-dual-samsung-galaxy-tab-p1000-tab-2-note-note-2-rj45-usb- |
||
| 18 | 10 | Denis 'GNUtoo' Carikli | *Exported pins*: USB D+, USB D-, USB VCC, USB GND, SOC UART RX, SOC UART TX. The ID pin isn't exported. |
| 19 | 1 | Denis 'GNUtoo' Carikli | |
| 20 | The USB cable can be plugged in a regular computer. |
||
| 21 | |||
| 22 | The RX and TX and GND are exported on the RJ45 cable. |
||
| 23 | |||
| 24 | 6 | Denis 'GNUtoo' Carikli | With the clip on the bottom, we have the following pinout on the RJ45: |
| 25 | 1 | Denis 'GNUtoo' Carikli | |
| 26 | <pre> |
||
| 27 | +-----------------------------------------------------+ |
||
| 28 | | [] [] [RX or TX?] [RX or TX?] [] [] [] [GND] [] [] | |
||
| 29 | | | |
||
| 30 | | | |
||
| 31 | | | |
||
| 32 | | | |
||
| 33 | | | |
||
| 34 | | | |
||
| 35 | | | |
||
| 36 | ....................................................... |
||
| 37 | | | |
||
| 38 | | | |
||
| 39 | | | |
||
| 40 | | | |
||
| 41 | | | |
||
| 42 | | | |
||
| 43 | | | |
||
| 44 | | | |
||
| 45 | |||
| 46 | 6 | Denis 'GNUtoo' Carikli | </pre> |
| 47 | |||
| 48 | 8 | Denis 'GNUtoo' Carikli | Inside the middle of the cable we have a tiny PCB that is just for soldering the pins and conducting them. |
| 49 | |||
| 50 | Top view with the plastic cover that has i-pmart removed. |
||
| 51 | On the bottom plastic cover, there is a white sticker with the following writings: |
||
| 52 | 1 | Denis 'GNUtoo' Carikli | <pre> |
| 53 | 8 | Denis 'GNUtoo' Carikli | USB-021 |
| 54 | SAMP1000 (RJ45+USB) cable |
||
| 55 | </pre> |
||
| 56 | 1 | Denis 'GNUtoo' Carikli | |
| 57 | 8 | Denis 'GNUtoo' Carikli | And here's the PCB pinout: |
| 58 | <pre> |
||
| 59 | |||
| 60 | 1 | Denis 'GNUtoo' Carikli | To Galaxy Tab (2) connector |
| 61 | |||
| 62 | 10 | Denis 'GNUtoo' Carikli | SOC UART RX or TX? ----+ |
| 63 | SOC UART RX or TX? -+ | |
||
| 64 | 8 | Denis 'GNUtoo' Carikli | USB GND----------+ | | |
| 65 | USB VCC ------+ | | | |
||
| 66 | USB D- ----+ | | | | |
||
| 67 | USB D+ -+ | | | | | |
||
| 68 | | | | | | | |
||
| 69 | 7 | Denis 'GNUtoo' Carikli | [NC?] [+][+][+][+][+][+] [NC?] |
| 70 | | | | | | | |
||
| 71 | 3 | Denis 'GNUtoo' Carikli | [NC?] [ ][ ][ ][ ][ ][ ] [NC?] |
| 72 | |||
| 73 | 4 | Denis 'GNUtoo' Carikli | To USB and RJ45 cables |
| 74 | </pre> |
||
| 75 | |||
| 76 | 9 | Denis 'GNUtoo' Carikli | On the Galaxy Tab connector, there is a gold connector only for certain pin numbers: |
| 77 | |||
| 78 | | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | |
||
| 79 | | NC | NC | D+ | D- | NC | NC | USB + | USB+ | NC | NC | NC | NC | NC | NC | GND | GND | NC | NC | NC | RX | TX | NC | NC | NC | NC | NC | NC | NC | NC | GND | |
||
| 80 | 5 | Denis 'GNUtoo' Carikli | |
| 81 | 10 | Denis 'GNUtoo' Carikli | h2. References |
| 82 | 1 | Denis 'GNUtoo' Carikli | |
| 83 | * The "Galaxy Tab Serial Cable thread":https://forum.xda-developers.com/showthread.php?t=1010314 on XDA. It also contains some pinout for the 30 pin connector. |