MPX4250A series (MPX4250A, MPXA4250A)

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MPX4250A series (MPX4250A, MPXA4250A) is a pressure sensor IC (20 to 250 kPa) made by NXP Semiconductors. This posting will provide the OSS-ECAL(Open Source Software for Electronic Components Abstraction Layer) for MPX4250A series .
MCU interface : ADC

CAUTION:Please be sure to refer to the latest version of the Datasheet prior to actual design.

MPX4250A series (MPX4250A, MPXA4250A)

General description

The MPX4250A/MPXA4250A Manifold Absolute Pressure (MAP) sensor for engine control is designed to sense absolute air pressure within the intake manifold. This measurement can be used to compute the amount of fuel required for each cylinder. The MPX4250A/MPXA4250A piezoresistive transducer is a state-of-the-art monolithic silicon pressure sensor designed for a wide range of applications, particularly those employing a microcontroller or microprocessor with A/D inputs. This transducer combines advanced micromachining techniques, thin-film metallization, and bipolar processing to provide an accurate, high-level analog output signal that is proportional to the applied pressure. The small form factor and high reliability of on-chip integration make the NXP sensor a logical and economical choice for the automotive system engineer.

Feature

1.5 % maximum error over 0 °C to 85 °C
Specifically designed for intake manifold absolute pressure sensing in engine control systems
Patented silicon shear stress strain gauge
Temperature compensated over –40 °C to +125 °C
Offers reduction in weight and volume compared to existing hybrid modules
Durable epoxy unibody element or thermoplastic small outline, surface mount package
Ideal for non-automotive applications
Available in three small outline packages and two unibody packages

Application

Turbo boost engine control
Ideally suited for microprocessor or microcontroller-based systems

OSS-ECAL specification

API Function

etSTS oMPX4250A( etCMD cmd, float32* rlt )

Return value
Parameter IN
Parameter OUT

etSTS
etCMD cmd
float32* rlt

OSS-ECAL status code
OSS-ECAL command code
Pressure 20 to 250 [kPa]

etCMD
eCMD_START

Feature :
Command to start AD conversion.

Process :
1. AD conversion start.

Command API function :
etSTS oMPX4250A_START( void )

Return value :
eSTS_FIN
eSTS_ERR_HAL_ADC
eSTS_ERR_COMMAND_CODE
eSTS_ERR_OTHERS_RUN
eSTS_ERR_ADC_OBJECT

NOTE :
Arduino, Mbeb, ModusToolbox not supported.

eCMD_READ

Feature :
Command that reads the AD conversion value, converts the AD conversion value to a characteristic Pressure, and stores the Pressure in rlt.

Process :
1. Read AD conversion value.
2. Convert AD conversion value to Pressure.
Voltage value = (AD conversion value × VDD) / (2^{AD bit} )
Pressure = ((voltage value – voltage offset value) / gain) + Pressure offset value (Min, Max Limit)
3. Store Pressure to rlt.

Command API function :
etSTS oMPX4250A_READ( float32* rlt )

Return value :
eSTS_FIN
eSTS_ERR_MIN
eSTS_ERR_MAX
eSTS_ERR_HAL_ADC
eSTS_ERR_COMMAND_CODE
eSTS_ERR_OTHERS_RUN
eSTS_ERR_ADC_OBJECT

NOTE :
Please execute this API function after starting AD conversion.
Arduino, Mbeb, ModusToolbox not supported.

eCMD_START_READ

Feature :
Command that starts AD conversion, waits for AD conversion to finish, reads out the AD conversion value, converts the AD conversion value to a characteristic Pressure, and stores the Pressure in rlt.

Process :
1. Read AD conversion value.
2. Wait until AD conversion is completed.
3. Read AD conversion value.
4. Convert AD conversion value to Pressure.
Voltage value = (AD conversion value × VDD) / (2^{AD bit} )
Pressure = ((voltage value – voltage offset value) / gain) + Pressure offset value (Min, Max Limit)
5. Store Pressure to rlt.

Command API function :
etSTS oMPX4250A_START_READ( float32* rlt )

Return value :
eSTS_FIN
eSTS_ERR_MIN
eSTS_ERR_MAX
eSTS_ERR_HAL_ADC
eSTS_ERR_COMMAND_CODE
eSTS_ERR_OTHERS_RUN
eSTS_ERR_ADC_OBJECT

NOTE :

Files

Folder^*	File	summary
MPX4250A_HALNAME/sample	sample.c (.cpp)	Sample Application Program
	sample.h	Sample Application Header
MPX4250A_HALNAME	oMPX4250A.c (.cpp)	OSS-ECAL Program for MPX4250A series
	oMPX4250A.h	OSS-ECAL Header for MPX4250A series
	oss_ecal.h	OSS-ECAL Common Header (Ver 01.00.00 or later)
	user_setting.c (.cpp)	Const and Table of User setting
	user_setting.h	Header of User setting
	readme.md	Readme
	OSS-ECAL Terms of Use.txt	OSS-ECAL Terms of Use

* For HALNAME, please refer to HAL Support.

HAL Support　List

MCU/Board manufacturer	HAL	MCU*	Development environment*	HALNAME
Arduino	Arduino 1.8.6	ATmega2560 ATmega328P	Mega 2560 Rev3 Arduino Pro Mini 3.3V	ARDUINO
ARM	Mbed 6.17.0	STM32F401RETx	STM32 Nucleo-64 boards	MBED
Infineon	ModusToolbox HAL Cat1 2.4.3	CYBLE-416045-02	CY8CPROTO-063-BLE PSoC 6 BLE Prototyping Kit	ModusToolbox
NXP	MCUXpresso SDK iMXRT1051B_1052B ksdk2_0	CYBLE-416045-02	IMXRT1050-EVKB	iMXRT1051B1052B
Renesas	SSP 2.4.0	R7FS7G27H3A01CFC	S7G2 SK	SSP
STM	STM32Cube FW_F4 V1.27.1	STM32F401RETx	STM32 Nucleo-64 boards	STM32F4
NXP	AUTOSAR (MCAL)	MPC574XG-100DS	MPC574XG-MB( Motherboard) MPC574XG-100DS(Daughter boards)	MCAL

* MCU and development environment at the time of development. Even if the same HAL is used, different MCUs and development environments may not work together.

OSS-ECAL Download

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HAL	Download　OSS-ECAL Ver
Arduino 1.8.6	Download MPX4250A_ARDUINO_010000.zip 11.64 KB 0 count
Mbed 6.17.0	Download MPX4250A_MBED_010000.zip 11.79 KB 0 count
ModusToolbox HAL Cat1 2.4.3	Download MPX4250A_ModusToolbox_010000.zip 12.03 KB 0 count
MCUXpresso SDK iMXRT1051B_1052B ksdk2_0	Download MPX4250A_iMXRT1051B1052B_010000.zip 12.69 KB 0 count
SSP 2.4.0	Download MPX4250A_SSP_010000.zip 12.29 KB 0 count
STM32Cube FW_F4 V1.27.1	Download MPX4250A_STM32F4_010000.zip 12.35 KB 0 count
MCAL	under development

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