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===== Taranis X9D Hardware Connections =====
The following documents the hardware inside the Taranis X9D transmitter
  * MCU: [[http://www.st.com/web/en/resource/technical/document/datasheet/CD00237391.pdf|STM32F205VET6]] 512kB Flash, 128kB RAM 100pin package
  * LCD Display: [[http://www.cnrstech.com/res/xunbao/pdres/201206/20120613102254933.pdf|RMG21264-01]] 212x64 B&W 4-grey level display
  * The RMG21264-00 uses the ST7586S Driver (up to 386x160x4) but the \\ RMG21264-01 seems to use an ST456RB 16-level LCD driver (missing datasheet)
  * Radio: CC2500 (Module on board no direct access)
  * Digital volume control: CAT5137 on i2c BUS
  * 256kbit EEPROM: ST M24256

==== STM32 Connections ====


=== GPIOA ===
^Pin               ^Description              ^
|0                 |Stick RV                 |
|1                 |Stick RH                 |
|2                 |Stick LH                 |
|3                 |Stick LV                 |
|4                 |Audio DAC (???)          |
|5                 |Switch C-                |
|6                 |POT L (Aux2)             |
|7                 |PPM for external module  |
|8                 |Trainer plug detect      |
|9                 |USB Vin                  |
|10                |PPM for FrSky Module     |
|11                |USB Data-                |
|12                |USB Data+                |
|13                |SWDIO (Pads on P12.2)    |
|14                |SWCLK (Pads on P12.3)    |
|15 (SPI3 Enable)  |I2S Audio WS (???)       |

=== GPIOB ===
^Pin             ^Description         ^
|0               |POT R (Aux3)        |
|1               |Switch D-           |
|2               |???                 |
|3               |Switch E-           |
|4               |Switch E+           |
|5               |Switch A+           |
|6 (I2C SCL)     |EEPROM SCL(???)     |
|7 (I2C SDA)     |EEPROM SDA(???)     |
|8               |Backlight PWM       |
|9 (I2C WP)      |EEPROM WP(???)      |
|10              |UART3 Tx            |
|11              |UART3 Rx            |
|12 (SPI2 CS)    |SD Card ChipSelect  |
|13 (SPI2 SCK)   |SD Card SCK         |
|14 (SPI2 MISO)  |SD Card MISO        |
|15 (SPI2 MOSI)  |SD Card MOSI        |

=== GPIOC ===
^Pin            ^Description          ^
|0              |Voltage detect       |
|1              |Buttom 'Trim RH -'   |
|2              |Buttom 'Trim RV +'   |
|3              |Buttom 'Trim RV -'   |
|4              |Slider L (Aux4)      |
|5              |Slider R (Aux5)      |
|6              |Power LED            |
|7              |Heartbeat (???)      |
|8              |Trainer PPM In       |
|9              |Trainer PPM Out      |
|10 (SPI3 SCK)  |I2S_Audio SCK(???)   |
|11             |Audio DAC Mute(???)  |
|12 (SPI3 SD)   |I2S_Audio SD(???)    |
|13             |Buttom 'Trim RH +'   |
|14             |XTAL                 |
|15             |XTAL                 |

=== GPIOD ===
^Pin  ^Description             ^
|0    |Power shutdown          |
|1    |Power switch postition  |
|2    |Button 'Exit'           |
|3    |Button 'Page'           |
|4    |Sport Enable(???)       |
|5    |Sport Tx(???)           |
|6    |Sport Rx(???)           |
|7    |Button 'Menu'           |
|8    |???                     |
|9    |SD Card Detect          |
|10   |LCD MOSI                |
|11   |LCD CLK                 |
|12   |LCD RST                 |
|13   |LCD A0                  |
|14   |LCD NCS                 |
|15   |N/C                     |

=== GPIOE ===
^Pin  ^Description         ^
|0    |Switch A-           |
|1    |Switch B+           |
|2    |Switch B-           |
|3    |Button 'Trim LH +'  |
|4    |Button 'Trim LH -'  |
|5    |Button 'Trim LV +'  |
|6    |Button 'Trim LV -'  |
|7    |Switch D+           |
|8    |Switch G-           |
|9    |Switch G+           |
|10   |Button 'Plus'       |
|11   |Button 'Enter'      |
|12   |Button 'Minus'      |
|13   |Switch H            |
|14   |Switch F            |
|15   |Switch C+           |

==== Pad P12 ====
^Pin  ^Description  ^
|1    |3.3V         |
|2    |PA13         |
|3    |PA14         |
|4    |GND          |


==== Externaml PPM Module (Pin 1 at bottom) ====
^Pin  ^Description  ^
|1    |SPORT        |
|2    |GND          |
|3    |???          |
|4    |Heartbeat    |
|5    |???          |

==== FCC Report ====
FCCID: [[https://www.fcc.gov/general/fcc-id-search-page|XYF X91216DK]]
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