diff --git a/core/embed/bootloader/main.c b/core/embed/bootloader/main.c
index 71b61d05e1..65053aeb51 100644
--- a/core/embed/bootloader/main.c
+++ b/core/embed/bootloader/main.c
@@ -37,6 +37,9 @@
 #ifdef USE_DMA2D
 #include "dma2d.h"
 #endif
+#ifdef USE_I2C
+#include "i2c.h"
+#endif
 #ifdef USE_TOUCH
 #include "touch/touch.h"
 #endif
@@ -325,6 +328,10 @@ int bootloader_main(void) {
 
   ui_screen_boot_empty(false);
 
+#ifdef USE_I2C
+  i2c_init();
+#endif
+
 #ifdef USE_TOUCH
   touch_power_on();
   touch_init();
diff --git a/core/embed/firmware/main.c b/core/embed/firmware/main.c
index d56ac9df77..435ad99315 100644
--- a/core/embed/firmware/main.c
+++ b/core/embed/firmware/main.c
@@ -53,6 +53,9 @@
 #ifdef USE_BUTTON
 #include "button.h"
 #endif
+#ifdef USE_I2C
+#include "i2c.h"
+#endif
 #ifdef USE_TOUCH
 #include "touch/touch.h"
 #endif
@@ -127,6 +130,10 @@ int main(void) {
   rgb_led_init();
 #endif
 
+#ifdef USE_I2C
+  i2c_init();
+#endif
+
 #ifdef USE_TOUCH
   touch_init();
 #endif
diff --git a/core/embed/prodtest/main.c b/core/embed/prodtest/main.c
index a676eab322..b2e6c4df9b 100644
--- a/core/embed/prodtest/main.c
+++ b/core/embed/prodtest/main.c
@@ -26,6 +26,7 @@
 #include "common.h"
 #include "display.h"
 #include "flash.h"
+#include "i2c.h"
 #include "mini_printf.h"
 #include "random_delays.h"
 #include "rng.h"
@@ -374,6 +375,7 @@ int main(void) {
   display_orientation(0);
   random_delays_init();
   sdcard_init();
+  i2c_init();
   touch_init();
   sbu_init();
   usb_init_all();
@@ -438,3 +440,5 @@ int main(void) {
 
   return 0;
 }
+
+void HardFault_Handler(void) { error_shutdown("INTERNAL ERROR!", "(HF)"); }
diff --git a/core/embed/trezorhal/boards/trezor_t.h b/core/embed/trezorhal/boards/trezor_t.h
index 0d28923707..4e9973f507 100644
--- a/core/embed/trezorhal/boards/trezor_t.h
+++ b/core/embed/trezorhal/boards/trezor_t.h
@@ -2,6 +2,7 @@
 #define _TREZOR_T_H
 
 #define USE_SD_CARD 1
+#define USE_I2C 1
 #define USE_TOUCH 1
 #define USE_SBU 1
 
diff --git a/core/embed/trezorhal/i2c.c b/core/embed/trezorhal/i2c.c
new file mode 100644
index 0000000000..68ee03dc9e
--- /dev/null
+++ b/core/embed/trezorhal/i2c.c
@@ -0,0 +1,124 @@
+
+
+#include STM32_HAL_H
+#include "i2c.h"
+#include "common.h"
+
+static I2C_HandleTypeDef i2c_handle;
+
+void HAL_I2C_MspInit(I2C_HandleTypeDef *hi2c) {
+  // enable I2C clock
+  __HAL_RCC_I2C1_CLK_ENABLE();
+  // GPIO have already been initialised by touch_init
+}
+
+void HAL_I2C_MspDeInit(I2C_HandleTypeDef *hi2c) {
+  __HAL_RCC_I2C1_CLK_DISABLE();
+}
+
+void i2c_init(void) {
+  if (i2c_handle.Instance) {
+    return;
+  }
+
+  GPIO_InitTypeDef GPIO_InitStructure;
+
+  // configure CTP I2C SCL and SDA GPIO lines (PB6 & PB7)
+  GPIO_InitStructure.Mode = GPIO_MODE_AF_OD;
+  GPIO_InitStructure.Pull = GPIO_NOPULL;
+  GPIO_InitStructure.Speed =
+      GPIO_SPEED_FREQ_LOW;  // I2C is a KHz bus and low speed is still good into
+  // the low MHz
+  GPIO_InitStructure.Alternate = GPIO_AF4_I2C1;
+  GPIO_InitStructure.Pin = GPIO_PIN_6 | GPIO_PIN_7;
+  HAL_GPIO_Init(GPIOB, &GPIO_InitStructure);
+
+  i2c_handle.Instance = I2C1;
+  i2c_handle.Init.ClockSpeed = 200000;
+  i2c_handle.Init.DutyCycle = I2C_DUTYCYCLE_16_9;
+  i2c_handle.Init.OwnAddress1 = 0xFE;  // master
+  i2c_handle.Init.AddressingMode = I2C_ADDRESSINGMODE_7BIT;
+  i2c_handle.Init.DualAddressMode = I2C_DUALADDRESS_DISABLE;
+  i2c_handle.Init.OwnAddress2 = 0;
+  i2c_handle.Init.GeneralCallMode = I2C_GENERALCALL_DISABLE;
+  i2c_handle.Init.NoStretchMode = I2C_NOSTRETCH_DISABLE;
+
+  if (HAL_OK != HAL_I2C_Init(&i2c_handle)) {
+    ensure(secfalse, "I2C was not loaded properly.");
+    return;
+  }
+}
+
+void _i2c_deinit(void) {
+  if (i2c_handle.Instance) {
+    HAL_I2C_DeInit(&i2c_handle);
+    i2c_handle.Instance = NULL;
+  }
+}
+
+void _i2c_ensure_pin(uint16_t GPIO_Pin, GPIO_PinState PinState) {
+  HAL_GPIO_WritePin(GPIOB, GPIO_Pin, PinState);
+  while (HAL_GPIO_ReadPin(GPIOB, GPIO_Pin) != PinState)
+    ;
+}
+
+// I2C cycle described in section 2.9.7 of STM CD00288116 Errata sheet
+//
+// https://www.st.com/content/ccc/resource/technical/document/errata_sheet/7f/05/b0/bc/34/2f/4c/21/CD00288116.pdf/files/CD00288116.pdf/jcr:content/translations/en.CD00288116.pdf
+
+void i2c_cycle(void) {
+  // PIN6 is SCL, PIN7 is SDA
+
+  // 1. Disable I2C peripheral
+  _i2c_deinit();
+
+  // 2. Configure SCL/SDA as GPIO OUTPUT Open Drain
+  GPIO_InitTypeDef GPIO_InitStructure;
+  GPIO_InitStructure.Mode = GPIO_MODE_OUTPUT_OD;
+  GPIO_InitStructure.Pull = GPIO_NOPULL;
+  GPIO_InitStructure.Speed = GPIO_SPEED_FREQ_LOW;
+  GPIO_InitStructure.Pin = GPIO_PIN_6 | GPIO_PIN_7;
+  HAL_GPIO_Init(GPIOB, &GPIO_InitStructure);
+  HAL_Delay(50);
+
+  // 3. Check SCL and SDA High level
+  _i2c_ensure_pin(GPIO_PIN_6, GPIO_PIN_SET);
+  _i2c_ensure_pin(GPIO_PIN_7, GPIO_PIN_SET);
+  // 4+5. Check SDA Low level
+  _i2c_ensure_pin(GPIO_PIN_7, GPIO_PIN_RESET);
+  // 6+7. Check SCL Low level
+  _i2c_ensure_pin(GPIO_PIN_6, GPIO_PIN_RESET);
+  // 8+9. Check SCL High level
+  _i2c_ensure_pin(GPIO_PIN_6, GPIO_PIN_SET);
+  // 10+11.  Check SDA High level
+  _i2c_ensure_pin(GPIO_PIN_7, GPIO_PIN_SET);
+
+  // 12. Configure SCL/SDA as Alternate function Open-Drain
+  GPIO_InitStructure.Mode = GPIO_MODE_AF_OD;
+  GPIO_InitStructure.Pull = GPIO_NOPULL;
+  GPIO_InitStructure.Speed = GPIO_SPEED_FREQ_LOW;
+  GPIO_InitStructure.Alternate = GPIO_AF4_I2C1;
+  GPIO_InitStructure.Pin = GPIO_PIN_6 | GPIO_PIN_7;
+  HAL_GPIO_Init(GPIOB, &GPIO_InitStructure);
+  HAL_Delay(50);
+
+  // 13. Set SWRST bit in I2Cx_CR1 register
+  __HAL_RCC_I2C1_FORCE_RESET();
+  HAL_Delay(50);
+
+  // 14. Clear SWRST bit in I2Cx_CR1 register
+  __HAL_RCC_I2C1_RELEASE_RESET();
+
+  // 15. Enable the I2C peripheral
+  i2c_init();
+  HAL_Delay(10);
+}
+
+HAL_StatusTypeDef i2c_transmit(uint8_t addr, uint8_t *data, uint16_t len,
+                               uint32_t timeout) {
+  return HAL_I2C_Master_Transmit(&i2c_handle, addr, data, len, timeout);
+}
+HAL_StatusTypeDef i2c_receive(uint8_t addr, uint8_t *data, uint16_t len,
+                              uint32_t timeout) {
+  return HAL_I2C_Master_Receive(&i2c_handle, addr, data, len, timeout);
+}
diff --git a/core/embed/trezorhal/i2c.h b/core/embed/trezorhal/i2c.h
new file mode 100644
index 0000000000..cbf6c3d84c
--- /dev/null
+++ b/core/embed/trezorhal/i2c.h
@@ -0,0 +1,9 @@
+
+#include STM32_HAL_H
+
+void i2c_init(void);
+void i2c_cycle(void);
+HAL_StatusTypeDef i2c_transmit(uint8_t addr, uint8_t *data, uint16_t len,
+                               uint32_t timeout);
+HAL_StatusTypeDef i2c_receive(uint8_t addr, uint8_t *data, uint16_t len,
+                              uint32_t timeout);
diff --git a/core/embed/trezorhal/touch/ft6x36.c b/core/embed/trezorhal/touch/ft6x36.c
index f1b383c7be..319963fc0a 100644
--- a/core/embed/trezorhal/touch/ft6x36.c
+++ b/core/embed/trezorhal/touch/ft6x36.c
@@ -25,6 +25,7 @@
 #include "secbool.h"
 
 #include "ft6x36.h"
+#include "i2c.h"
 #include "touch.h"
 
 #define TOUCH_ADDRESS \
@@ -43,15 +44,11 @@
 #define EVENT_OLD_TIMEOUT_MS 50
 #define EVENT_MISSING_TIMEOUT_MS 50
 
-static I2C_HandleTypeDef i2c_handle;
-
 static void touch_default_pin_state(void) {
   // set power off and other pins as per section 3.5 of FT6236 datasheet
   HAL_GPIO_WritePin(GPIOB, GPIO_PIN_10,
                     GPIO_PIN_SET);  // CTP_ON/PB10 (active low) i.e.- CTPM power
                                     // off when set/high/log 1
-  HAL_GPIO_WritePin(GPIOB, GPIO_PIN_6, GPIO_PIN_RESET);  // CTP_I2C_SCL/PB6
-  HAL_GPIO_WritePin(GPIOB, GPIO_PIN_7, GPIO_PIN_RESET);  // CTP_I2C_SDA/PB7
   HAL_GPIO_WritePin(
       GPIOC, GPIO_PIN_4,
       GPIO_PIN_RESET);  // CTP_INT/PC4 normally an input, but drive low as an
@@ -66,7 +63,7 @@ static void touch_default_pin_state(void) {
   GPIO_InitStructure.Mode = GPIO_MODE_OUTPUT_PP;
   GPIO_InitStructure.Pull = GPIO_NOPULL;
   GPIO_InitStructure.Speed = GPIO_SPEED_FREQ_LOW;
-  GPIO_InitStructure.Pin = GPIO_PIN_10 | GPIO_PIN_6 | GPIO_PIN_7;
+  GPIO_InitStructure.Pin = GPIO_PIN_10;
   HAL_GPIO_Init(GPIOB, &GPIO_InitStructure);
   GPIO_InitStructure.Pin = GPIO_PIN_4 | GPIO_PIN_5;
   HAL_GPIO_Init(GPIOC, &GPIO_InitStructure);
@@ -84,16 +81,6 @@ static void touch_active_pin_state(void) {
 
   GPIO_InitTypeDef GPIO_InitStructure;
 
-  // configure CTP I2C SCL and SDA GPIO lines (PB6 & PB7)
-  GPIO_InitStructure.Mode = GPIO_MODE_AF_OD;
-  GPIO_InitStructure.Pull = GPIO_NOPULL;
-  GPIO_InitStructure.Speed =
-      GPIO_SPEED_FREQ_LOW;  // I2C is a KHz bus and low speed is still good into
-                            // the low MHz
-  GPIO_InitStructure.Alternate = GPIO_AF4_I2C1;
-  GPIO_InitStructure.Pin = GPIO_PIN_6 | GPIO_PIN_7;
-  HAL_GPIO_Init(GPIOB, &GPIO_InitStructure);
-
   // PC4 capacitive touch panel module (CTPM) interrupt (INT) input
   GPIO_InitStructure.Mode = GPIO_MODE_IT_RISING;
   GPIO_InitStructure.Pull = GPIO_PULLUP;
@@ -107,118 +94,16 @@ static void touch_active_pin_state(void) {
                    // 300ms, giving an extra 10ms
 }
 
-void HAL_I2C_MspInit(I2C_HandleTypeDef *hi2c) {
-  // enable I2C clock
-  __HAL_RCC_I2C1_CLK_ENABLE();
-  // GPIO have already been initialised by touch_init
-}
-
-void HAL_I2C_MspDeInit(I2C_HandleTypeDef *hi2c) {
-  __HAL_RCC_I2C1_CLK_DISABLE();
-}
-
-static void _i2c_init(void) {
-  if (i2c_handle.Instance) {
-    return;
-  }
-
-  i2c_handle.Instance = I2C1;
-  i2c_handle.Init.ClockSpeed = 200000;
-  i2c_handle.Init.DutyCycle = I2C_DUTYCYCLE_16_9;
-  i2c_handle.Init.OwnAddress1 = 0xFE;  // master
-  i2c_handle.Init.AddressingMode = I2C_ADDRESSINGMODE_7BIT;
-  i2c_handle.Init.DualAddressMode = I2C_DUALADDRESS_DISABLE;
-  i2c_handle.Init.OwnAddress2 = 0;
-  i2c_handle.Init.GeneralCallMode = I2C_GENERALCALL_DISABLE;
-  i2c_handle.Init.NoStretchMode = I2C_NOSTRETCH_DISABLE;
-
-  if (HAL_OK != HAL_I2C_Init(&i2c_handle)) {
-    ensure(secfalse, "Touch screen panel was not loaded properly.");
-    return;
-  }
-}
-
-static void _i2c_deinit(void) {
-  if (i2c_handle.Instance) {
-    HAL_I2C_DeInit(&i2c_handle);
-    i2c_handle.Instance = NULL;
-  }
-}
-
-static void _i2c_ensure_pin(uint16_t GPIO_Pin, GPIO_PinState PinState) {
-  HAL_GPIO_WritePin(GPIOB, GPIO_Pin, PinState);
-  while (HAL_GPIO_ReadPin(GPIOB, GPIO_Pin) != PinState)
-    ;
-}
-
-// I2C cycle described in section 2.9.7 of STM CD00288116 Errata sheet
-//
-// https://www.st.com/content/ccc/resource/technical/document/errata_sheet/7f/05/b0/bc/34/2f/4c/21/CD00288116.pdf/files/CD00288116.pdf/jcr:content/translations/en.CD00288116.pdf
-
-static void _i2c_cycle(void) {
-  // PIN6 is SCL, PIN7 is SDA
-
-  // 1. Disable I2C peripheral
-  _i2c_deinit();
-
-  // 2. Configure SCL/SDA as GPIO OUTPUT Open Drain
-  GPIO_InitTypeDef GPIO_InitStructure;
-  GPIO_InitStructure.Mode = GPIO_MODE_OUTPUT_OD;
-  GPIO_InitStructure.Pull = GPIO_NOPULL;
-  GPIO_InitStructure.Speed = GPIO_SPEED_FREQ_LOW;
-  GPIO_InitStructure.Pin = GPIO_PIN_6 | GPIO_PIN_7;
-  HAL_GPIO_Init(GPIOB, &GPIO_InitStructure);
-  HAL_Delay(50);
-
-  // 3. Check SCL and SDA High level
-  _i2c_ensure_pin(GPIO_PIN_6, GPIO_PIN_SET);
-  _i2c_ensure_pin(GPIO_PIN_7, GPIO_PIN_SET);
-  // 4+5. Check SDA Low level
-  _i2c_ensure_pin(GPIO_PIN_7, GPIO_PIN_RESET);
-  // 6+7. Check SCL Low level
-  _i2c_ensure_pin(GPIO_PIN_6, GPIO_PIN_RESET);
-  // 8+9. Check SCL High level
-  _i2c_ensure_pin(GPIO_PIN_6, GPIO_PIN_SET);
-  // 10+11.  Check SDA High level
-  _i2c_ensure_pin(GPIO_PIN_7, GPIO_PIN_SET);
-
-  // 12. Configure SCL/SDA as Alternate function Open-Drain
-  GPIO_InitStructure.Mode = GPIO_MODE_AF_OD;
-  GPIO_InitStructure.Pull = GPIO_NOPULL;
-  GPIO_InitStructure.Speed = GPIO_SPEED_FREQ_LOW;
-  GPIO_InitStructure.Alternate = GPIO_AF4_I2C1;
-  GPIO_InitStructure.Pin = GPIO_PIN_6 | GPIO_PIN_7;
-  HAL_GPIO_Init(GPIOB, &GPIO_InitStructure);
-  HAL_Delay(50);
-
-  // 13. Set SWRST bit in I2Cx_CR1 register
-  __HAL_RCC_I2C1_FORCE_RESET();
-  HAL_Delay(50);
-
-  // 14. Clear SWRST bit in I2Cx_CR1 register
-  __HAL_RCC_I2C1_RELEASE_RESET();
-
-  // 15. Enable the I2C peripheral
-  _i2c_init();
-  HAL_Delay(10);
-}
-
 void touch_set_mode(void) {
   // set register 0xA4 G_MODE to interrupt trigger mode (0x01). basically, CTPM
   // generates a pulse when new data is available
   uint8_t touch_panel_config[] = {0xA4, 0x01};
-  ensure(
-      sectrue * (HAL_OK == HAL_I2C_Master_Transmit(
-                               &i2c_handle, TOUCH_ADDRESS, touch_panel_config,
-                               sizeof(touch_panel_config), 10)),
-      "Touch screen panel was not loaded properly.");
+  ensure(sectrue * (HAL_OK == i2c_transmit(TOUCH_ADDRESS, touch_panel_config,
+                                           sizeof(touch_panel_config), 10)),
+         "Touch screen panel was not loaded properly.");
 }
 
 void touch_power_on(void) {
-  if (i2c_handle.Instance) {
-    return;
-  }
-
   touch_default_pin_state();
 
   // turn on CTP circuitry
@@ -227,7 +112,6 @@ void touch_power_on(void) {
 }
 
 void touch_power_off(void) {
-  _i2c_deinit();
   // turn off CTP circuitry
   HAL_Delay(50);
   touch_default_pin_state();
@@ -236,9 +120,6 @@ void touch_power_off(void) {
 void touch_init(void) {
   GPIO_InitTypeDef GPIO_InitStructure;
 
-  // I2C device interface configuration
-  _i2c_init();
-
   // PC4 capacitive touch panel module (CTPM) interrupt (INT) input
   GPIO_InitStructure.Mode = GPIO_MODE_IT_RISING;
   GPIO_InitStructure.Pull = GPIO_PULLUP;
@@ -254,10 +135,8 @@ void touch_init(void) {
 void touch_sensitivity(uint8_t value) {
   // set panel threshold (TH_GROUP) - default value is 0x12
   uint8_t touch_panel_threshold[] = {0x80, value};
-  ensure(sectrue *
-             (HAL_OK == HAL_I2C_Master_Transmit(
-                            &i2c_handle, TOUCH_ADDRESS, touch_panel_threshold,
-                            sizeof(touch_panel_threshold), 10)),
+  ensure(sectrue * (HAL_OK == i2c_transmit(TOUCH_ADDRESS, touch_panel_threshold,
+                                           sizeof(touch_panel_threshold), 10)),
          NULL);
 }
 
@@ -321,15 +200,13 @@ uint32_t touch_read(void) {
   last_check_time = hal_ticks_ms();
 
   uint8_t outgoing[] = {0x00};  // start reading from address 0x00
-  int result = HAL_I2C_Master_Transmit(&i2c_handle, TOUCH_ADDRESS, outgoing,
-                                       sizeof(outgoing), 1);
+  int result = i2c_transmit(TOUCH_ADDRESS, outgoing, sizeof(outgoing), 1);
   if (result != HAL_OK) {
-    if (result == HAL_BUSY) _i2c_cycle();
+    if (result == HAL_BUSY) i2c_cycle();
     return 0;
   }
 
-  if (HAL_OK != HAL_I2C_Master_Receive(&i2c_handle, TOUCH_ADDRESS, touch_data,
-                                       TOUCH_PACKET_SIZE, 1)) {
+  if (HAL_OK != i2c_receive(TOUCH_ADDRESS, touch_data, TOUCH_PACKET_SIZE, 1)) {
     return 0;  // read failure
   }
 
diff --git a/core/site_scons/boards/trezor_t.py b/core/site_scons/boards/trezor_t.py
index 4f1c3ac696..54617f12d1 100644
--- a/core/site_scons/boards/trezor_t.py
+++ b/core/site_scons/boards/trezor_t.py
@@ -14,6 +14,7 @@ def configure(env, features_wanted, defines, sources):
     sources += [f'embed/trezorhal/displays/{display}', ]
 
     if "input" in features_wanted:
+        sources += ['embed/trezorhal/i2c.c', ]
         sources += ['embed/trezorhal/touch/touch.c', ]
         sources += ['embed/trezorhal/touch/ft6x36.c', ]
         features_available.append("touch")
diff --git a/tools/check-bitcoin-only b/tools/check-bitcoin-only
index 51e2e34bbe..8fe245c346 100755
--- a/tools/check-bitcoin-only
+++ b/tools/check-bitcoin-only
@@ -9,6 +9,7 @@ EXCEPTIONS+=( "cinema" "dash" "enemy" "float" "flock" "flower" "floor" "floral"
 EXCEPTIONS+=( "mnemonic" )  # has NEM in it
 EXCEPTIONS+=( "workflow" "overflow" )  # has Flo in it
 EXCEPTIONS+=( "SyntaxError" )  # has Axe in it
+EXCEPTIONS+=( "DKDNEM" )  # has NEM in it, some sort of weird coincidence
 
 GREP_ARGS=()
 for exception in "${EXCEPTIONS[@]}"; do