diff --git a/firmware/config/boards/arro_board.h b/firmware/config/boards/arro_board.h
index ad0e745640..bdfa986eb1 100644
--- a/firmware/config/boards/arro_board.h
+++ b/firmware/config/boards/arro_board.h
@@ -50,7 +50,7 @@
 #define STM32_PWM_USE_TIM9                  FALSE
 
 #define STM32_SPI_USE_SPI1                  TRUE
-#define STM32_SPI_USE_SPI2                  FALSE // external ADC
+#define STM32_SPI_USE_SPI2                  TRUE // external ADC
 #define STM32_SPI_USE_SPI3                  TRUE // potentiometer
 
 #define STM32_CAN_USE_CAN1                  TRUE
@@ -130,25 +130,8 @@
  */
 #define EFI_CUSTOM_PANIC_METHOD TRUE
 
-/*
- * 10 channel board is (from left to right):
- * ADC 15	PC5		TPS
- * ADC 14	PC4		MAP
- * ADC 7 	PA7		IAT
- * ADC 6	PA6		CLT
- * ADC 5	PA5		TIM2_CH1
- * ADC 4	PA4
- * ADC 3	PA3
- * ADC 2	PA2
- * ADC 1	PA1		vBatt
- * ADC 0	PA0		MAF
- */
-
-#define ADC_LOGIC_TPS_2 ADC_CHANNEL_IN0
-
 #define ADC_CHANNEL_VREF ADC_CHANNEL_IN14
 
-
 /**
  * currently ChibiOS uses only first and second channels of each timer for input capture
  *
diff --git a/firmware/config/efifeatures.h b/firmware/config/efifeatures.h
index c7f23de56b..5c6f24c42f 100644
--- a/firmware/config/efifeatures.h
+++ b/firmware/config/efifeatures.h
@@ -75,7 +75,7 @@
 
 #define EFI_MAX_31855 TRUE
 
-#define EFI_HIP_9011 FALSE
+#define EFI_HIP_9011 TRUE
 
 #define EFI_INTERNAL_ADC TRUE
 
diff --git a/firmware/console/status_loop.cpp b/firmware/console/status_loop.cpp
index 2d63263d7d..9bc6854bb4 100644
--- a/firmware/console/status_loop.cpp
+++ b/firmware/console/status_loop.cpp
@@ -134,7 +134,7 @@ void printSensors(Engine *engine) {
 	reportSensorF("baro", getBaroPressure(), 2);
 
 	reportSensorF("afr", getAfr(), 2);
-	reportSensorF("vref", getVRef(), 2);
+	reportSensorF("vref", getVRef(engineConfiguration), 2);
 	reportSensorF("vbatt", getVBatt(engineConfiguration), 2);
 
 	reportSensorF("TRG_0_DUTY", getTriggerDutyCycle(0), 2);
diff --git a/firmware/controllers/algo/auto_generated_enums.cpp b/firmware/controllers/algo/auto_generated_enums.cpp
index 7e705d8770..8714df364f 100644
--- a/firmware/controllers/algo/auto_generated_enums.cpp
+++ b/firmware/controllers/algo/auto_generated_enums.cpp
@@ -105,6 +105,10 @@ case INJECTOR_10_OUTPUT:
   return "INJECTOR_10_OUTPUT";
 case INJECTOR_6_OUTPUT:
   return "INJECTOR_6_OUTPUT";
+case SPI_CS_HIP9011:
+	return "SPI_CS_HIP9011";
+case HIP9011_INT_HOLD:
+	return "HIP9011_INT_HOLD";
 case SPI_CS_1:
   return "SPI_CS_1";
 case SPI_CS_3:
diff --git a/firmware/controllers/algo/engine_configuration.h b/firmware/controllers/algo/engine_configuration.h
index cdf3233eed..8c356ea9eb 100644
--- a/firmware/controllers/algo/engine_configuration.h
+++ b/firmware/controllers/algo/engine_configuration.h
@@ -204,6 +204,7 @@ typedef struct {
 	unsigned int isSdCardEnabled : 1; // bit 3
 	unsigned int isFastAdcEnabled : 1; // bit 4
 	unsigned int isEngineControlEnabled : 1; // bit 5
+	unsigned int isHip9011Enabled : 1; // bit 6
 
 	brain_pin_e logicAnalyzerPins[LOGIC_ANALYZER_CHANNEL_COUNT];
 	/**
@@ -240,7 +241,9 @@ typedef struct {
 
 	short int fsioFrequency[LE_COMMAND_COUNT];
 
-	int unusedbs[41];
+	brain_pin_e hip9011CsPin;
+	brain_pin_e hip9011IntHoldPin;
+	int unusedbs[39];
 
 	le_formula_t le_formulas[LE_COMMAND_COUNT];
 
@@ -518,7 +521,9 @@ typedef struct {
 	short int acIdleRpmBump;
 	short int unusedShort;
 
-	int unused3[88];
+	adc_channel_e vRefAdcChannel;
+
+	int unused3[87];
 
 } engine_configuration_s;
 
diff --git a/firmware/controllers/algo/io_pins.h b/firmware/controllers/algo/io_pins.h
index 85dfc2e403..6487db5c43 100644
--- a/firmware/controllers/algo/io_pins.h
+++ b/firmware/controllers/algo/io_pins.h
@@ -131,6 +131,9 @@ typedef enum {
 	SPI_CS_3,
 	SPI_CS_4,
 	SPI_CS_SD_MODULE,
+	SPI_CS_HIP9011,
+
+	HIP9011_INT_HOLD,
 
 	MAIN_RELAY,
 
diff --git a/firmware/controllers/engine_controller.cpp b/firmware/controllers/engine_controller.cpp
index 702e397a34..7471bd828f 100644
--- a/firmware/controllers/engine_controller.cpp
+++ b/firmware/controllers/engine_controller.cpp
@@ -72,8 +72,8 @@ extern OutputPin outputs[IO_PIN_COUNT];
 extern pin_output_mode_e *pinDefaultState[IO_PIN_COUNT];
 extern bool hasFirmwareErrorFlag;
 
-static LEElement * fsioLogics[LE_COMMAND_COUNT];
-static SimplePwm fsioPwm[LE_COMMAND_COUNT];
+static LEElement * fsioLogics[LE_COMMAND_COUNT] CCM_OPTIONAL;
+static SimplePwm fsioPwm[LE_COMMAND_COUNT] CCM_OPTIONAL;
 
 persistent_config_container_s persistentState CCM_OPTIONAL;
 
diff --git a/firmware/controllers/sensors/voltage.cpp b/firmware/controllers/sensors/voltage.cpp
index c235b7335e..a1e4808ee9 100644
--- a/firmware/controllers/sensors/voltage.cpp
+++ b/firmware/controllers/sensors/voltage.cpp
@@ -15,9 +15,8 @@
 
 extern engine_configuration_s *engineConfiguration;
 
-float getVRef(void) {
-//	return getAdcValue(ADC_CHANNEL_VREF);
-	return getVoltageDivided((adc_channel_e)ADC_CHANNEL_VREF);
+float getVRef(engine_configuration_s *engineConfiguration) {
+	return getVoltageDivided(engineConfiguration->vRefAdcChannel);
 }
 
 float getVBatt(engine_configuration_s *engineConfiguration) {
diff --git a/firmware/controllers/sensors/voltage.h b/firmware/controllers/sensors/voltage.h
index 68c1c3f48c..4fe70ff54b 100644
--- a/firmware/controllers/sensors/voltage.h
+++ b/firmware/controllers/sensors/voltage.h
@@ -13,16 +13,7 @@
 #include "main.h"
 #include "engine_configuration.h"
 
-#ifdef __cplusplus
-extern "C"
-{
-#endif /* __cplusplus */
-
-float getVRef(void);
+float getVRef(engine_configuration_s *engineConfiguration);
 float getVBatt(engine_configuration_s *engineConfiguration);
 
-#ifdef __cplusplus
-}
-#endif /* __cplusplus */
-
 #endif
diff --git a/firmware/hw_layer/HIP9011.cpp b/firmware/hw_layer/HIP9011.cpp
index 5334f44280..655434e533 100644
--- a/firmware/hw_layer/HIP9011.cpp
+++ b/firmware/hw_layer/HIP9011.cpp
@@ -18,6 +18,7 @@
  */
 
 #include "main.h"
+#include "engine.h"
 
 #if EFI_HIP_9011
 
@@ -64,7 +65,7 @@ static msg_t ivThread(int param) {
 
 	tx_buff[0] = HIP_ADVANCED_MODE;
 
-	tx_buff[4] = 0xF8;// 0b11111000;
+	tx_buff[4] = 0xF8; // 0b11111000;
 
 	while (TRUE) {
 		chThdSleepMilliseconds(10);
@@ -82,7 +83,12 @@ static msg_t ivThread(int param) {
 #endif
 }
 
+EXTERN_ENGINE
+;
+
 void initHip9011(void) {
+	if (!boardConfiguration->isHip9011Enabled)
+		return;
 	initLogging(&logger, "HIP driver");
 
 	print("Starting HIP9011/TPIC8101 driver\r\n");
diff --git a/firmware/hw_layer/hardware.cpp b/firmware/hw_layer/hardware.cpp
index b347b54388..d6943aba79 100644
--- a/firmware/hw_layer/hardware.cpp
+++ b/firmware/hw_layer/hardware.cpp
@@ -292,7 +292,7 @@ SPIDriver * getSpiDevice(spi_device_e spiDevice) {
 	}
 #endif
 #if STM32_SPI_USE_SPI2 || defined(__DOXYGEN__)
-	if (spiDevic e== SPI_DEVICE_2) {
+	if (spiDevice == SPI_DEVICE_2) {
 		return &SPID2;
 	}
 #endif
diff --git a/firmware/rusefi.cpp b/firmware/rusefi.cpp
index 812ff4ea7e..45ce59fea8 100644
--- a/firmware/rusefi.cpp
+++ b/firmware/rusefi.cpp
@@ -265,5 +265,5 @@ int getRusEfiVersion(void) {
 		return 1; // this is here to make the compiler happy about the unused array
 	if (UNUSED_CCM_SIZE == 0)
 		return 1; // this is here to make the compiler happy about the unused array
-	return 20141204;
+	return 20141205;
 }