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TREZOR Core Hardware

TREZOR Model T Open Source Hardware Reference Documentation

Photo

Photo Front

Photo of assembled board (top)

Assembled Board Top

Photo of assembled board (bottom)

Assembled Board Bottom

Photo of assembled TFT LCD display + capacitive touch panel module (top)

Display Module Top

Photo of assembled TFT LCD display + capacitive touch panel module (bottom)

Display Module Bottom

Photo of disassembled TFT LCD display + capacitive touch panel module (top) (CTPM on left) (TFT LCD broken glass removed)

Display Module Disassembled Top

Photo of disassembled TFT LCD display + capacitive touch panel module (bottom) (CTPM on left) (TFT LCD broken glass removed)

Display Module Disassembled Bottom

Bill of Materials / BOM

BOM

Schematic

Schematic

Developer Kit

Display

  • Resolution: 240px x 240px -OR- 240px x 320px
  • Driver IC: ST7789V, GC9307, or ILI9341V (on-chip display data RAM of 240x320x18 bits)
  • 18-bit (262,144) RGB color graphic type TFT-LCD
  • Bus/Interface: 8080-I 8-bit parallel with 16-bit/pixel (RGB 5-6-5)
Pinout
Description MCU Pin Notes
LCD_RST PC14 display module pin 21. benign conflict with unpopulated OSC32_IN on dev board.
LCD_FMARK PD12 tearing effect input; display module pin 22
LCD_PWM PA7 backlight control (brightness); display module pin 29. benign conflict with I2C_EXT_RST on dev board.
LCD_CS PD7 display module pin 23
LCD_RS PD11 register select aka command/data; display module pin 24
LCD_RD PD4 display module pin 26
LCD_WR PD5 display module pin 25
LCD_D0 PD14 display module pin 3
LCD_D1 PD15 display module pin 4
LCD_D2 PD0 display module pin 5
LCD_D3 PD1 display module pin 6
LCD_D4 PE7 display module pin 7
LCD_D5 PE8 display module pin 8
LCD_D6 PE9 display module pin 9
LCD_D7 PE10 display module pin 10
LCD_D8 PE11 not currently used

Capacitive Touch Panel / Sensor

  • Bus/Interface: I2C
  • Driver IC: FT6236 or FT6206
  • single touch
Pinout
Description MCU Pin Notes
TOUCH_ON PB10 no mapped pin on display module
I2C1_SCL PB6 display module pin 30
I2C1_SDA PB7 display module pin 31
EINT PC4 not currently used. display module pin 39. conflict with USB OTG FS PSO on dev board.
REST PC5 benign conflict with USB OTG FS OC on dev board. no mapped pin on display module.

microSD Socket

  • Bus/Interface: 4-bit
Pinout
Description MCU Pin
SDIO_D0 PC8
SDIO_D1 PC9
SDIO_D2 PC10
SDIO_D3 PC11
SDIO_CK PC12
SDIO_CMD PD2
SD_CARDDETECT PC13
SD_ON PC0

USB Socket

  • USB HS (high-speed) peripheral in FS (full-speed) mode
Pinout
Description MCU Pin Notes
OTG_HS_VBUS PB13
OTG_HS_ID PB12
OTG_HS_DM PB14
OTG_HS_DP PB15
SBU1 PA2 not currently used. conflict with L3GD20 Gyroscope MEMS on dev board.
SBU2 PA3 not currently used

Dev Board

  • STM32F429ZIT6
  • HSE / High-Speed External Crystal: 8 MHz
  • Integrated STMicroelectronics ST-LINK/V2.1 debugger

Note: There are many conflicts between how the software maps GPIO pins and how the dev board maps them to its functions. Many of the conflicts are resolved by removing the external SDRAM chip and the TFT LCD display + resistive touch panel that come attached to the dev board. The unresolved conflicts are noted in the pinout descriptions above. Currently, testing has shown that it is not necessary to remove either the SDRAM or the TFT LCD display + resistive touch panel. If you choose to remove them, our experience is that the easiest way to remove the SDRAM chip is by first cutting the leads on one side of the chip (e.g.- with an X-Acto knife) and then lifting the chip and rocking it until the leads on the other side break. Be sure that no broken leads short to another pin as this can cause the dev board and/or display to malfunction. If some do, just clean them up so that they are separate again. This method reduces the amount of knife work, and the chance for slicing other things on the board (or yourself). To remove the TFT LCD display + resistive touch panel module, lift the module away from the metal tray, bend the metal tray out of the way, then cleanly pull/tear the flex PCB away from the solder connections to the main board (the connections usually break without much force). The metal tray is attached to the board with double stick tape. You just have to pull that up.

Photo of dev board before modifications (top)

Dev Board Top Before

Photo of dev board before modifications (bottom)

Dev Board Bottom Before

Minimum MCU requirements:

  • STM32F4 family STM32F427VIT6
  • 168 MHz, 8 MHz HSE
  • 2048 KB Flash memory
  • 192 KB SRAM
  • 64 KB CCMRAM
  • FMC controller
  • TRNG

Clock Tree

Clock Tree