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Product overview

Description

The ST72F321 and ST72321 devices are members of the ST7 microcontroller family designed for mid-range applications. All devices are based on a common industry-standard 8-bit core, featuring an enhanced instruction set and are available with FLASH or ROM program memory.
Under software control, all devices can be placed in WAIT, SLOW, ACTIVE-HALT or HALT mode, reducing power consumption when the application is in idle or stand-by state.
The enhanced instruction set and addressing modes of the ST7 offer both power and flexibility to software developers, enabling the design of highly efficient and compact application code. In addition to standard 8-bit data management, all ST7 microcontrollers feature true bit manipulation, 8x8 unsigned multiplication and indirect addressing modes.

All features
1 Analog peripheral10-bit ADC with up to 16 input ports

3 Communications InterfacesSPI synchronous serial interfaceSCI asynchronous serial interfaceI²C multimaster interface

Development ToolsFull hardware/software development packageIn-Circuit Testing capability

Memories32K to 60K dual voltage High Density Flash (HDFlash) or ROM with read-out protection capability. In-Application Programming and In-Circuit Programming for HDFlash devices1K to 2K RAMHDFlash endurance: 100 cycles, data retention: 20 years at 55 ^oC

Interrupt ManagementNested interrupt controller14 interrupt vectors plus TRAP and RESETTop Level Interrupt (TLI) pin on 64-pin devices15 external interrupt lines (on 4 vectors)

Clock, Reset And Supply ManagementEnhanced low voltage supervisor (LVD) for main supply and auxiliary voltage detector (AVD) with interrupt capabilityClock sources: crystal/ceramic resonator oscillators, internal RC oscillator, clock security system and bypass for external clockPLL for 2x frequency multiplicationFour Power Saving Modes: Halt, Active-Halt,Wait and Slow

5 TimersMain Clock Controller with: Real time base, Beep and Clock-out capabilitiesConfigurable watchdog timerTwo 16-bit timers with: 2 input captures, 2 output compares, external clock input on one timer, PWM and pulse generator modes8-bit PWM Auto-reload timer with: 2 input captures, 4 PWM outputs, output compare and time base interrupt, external clock with event detector

Instruction Set8-bit Data Manipulation63 Basic Instructions17 main Addressing Modes8 x 8 Unsigned Multiply Instruction

Up to 48 I/O Ports48/32 multifunctional bidirectional I/O lines34/22 alternate function lines16/12 high sink outputs
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Circuit Diagram

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All tools & software

MCU & MPU Embedded Software

Part number	Status	Description	Type	Supplier
STSW-ST7020	Active	HDFlash IAP C-Driver Compatible with Metrowerks and Cosmic compilers.	Legacy MCUs Embedded Software	ST	STSW-ST7020 Description: HDFlash IAP C-Driver Compatible with Metrowerks and Cosmic compilers.
STSW-ST7025	Active	ST7 USB Low Speed EvalKit Firmware	Legacy MCUs Embedded Software	ST	STSW-ST7025 Description: ST7 USB Low Speed EvalKit Firmware
STSW-ST7029	Active	ST7 XFLASH IAP example with the ST7FOPTIONS-EVAL board	Legacy MCUs Embedded Software	ST	STSW-ST7029 Description: ST7 XFLASH IAP example with the ST7FOPTIONS-EVAL board
STSW-ST7030	Active	XFlash IAP C-Driver Compatible with Metrowerks and Cosmic compilers.	Legacy MCUs Embedded Software	ST	STSW-ST7030 Description: XFlash IAP C-Driver Compatible with Metrowerks and Cosmic compilers.
STSW-ST7031	Active	S/W Implementation of I2C Bus master	Legacy MCUs Embedded Software	ST	STSW-ST7031 Description: S/W Implementation of I2C Bus master
STSW-ST7032	Active	Checksum self checking capability	Legacy MCUs Embedded Software	ST	STSW-ST7032 Description: Checksum self checking capability
STSW-ST7033	Active	ST72141 BLDC motor control software and flowchart example	Legacy MCUs Embedded Software	ST	STSW-ST7033 Description: ST72141 BLDC motor control software and flowchart example
STSW-ST7034	Active	Translating assembly code from HC05 to ST7	Legacy MCUs Embedded Software	ST	STSW-ST7034 Description: Translating assembly code from HC05 to ST7
STSW-ST7035	Active	Handling suspend mode on a USB mouse	Legacy MCUs Embedded Software	ST	STSW-ST7035 Description: Handling suspend mode on a USB mouse
STSW-ST7038	Active	Workaround to ISP mode limitation on the ST7MDT1-DVP2 and ST7MDT2-DVP2	Legacy MCUs Embedded Software	ST	STSW-ST7038 Description: Workaround to ISP mode limitation on the ST7MDT1-DVP2 and ST7MDT2-DVP2
STSW-ST7041	Active	ST7MC Three-Phase AC Induction Motor Ccontrol Software Library	Legacy MCUs Embedded Software	ST	STSW-ST7041 Description: ST7MC Three-Phase AC Induction Motor Ccontrol Software Library
STSW-ST7046	Active	Ekey-Udisk solution	Legacy MCUs Embedded Software	ST	STSW-ST7046 Description: Ekey-Udisk solution
STSW-ST7058	Active	ST Visual Develop (STVD 3.3.2), core debugger source files	Legacy MCUs Embedded Software	ST	STSW-ST7058 Description: ST Visual Develop (STVD 3.3.2), core debugger source files
STSW-ST7060	Active	Half Duplex USB-to-Serial bridge using the ST72611 USB microcontroller	Legacy MCUs Embedded Software	ST	STSW-ST7060 Description: Half Duplex USB-to-Serial bridge using the ST72611 USB microcontroller
STSW-ST7061	Active	LIN (Local Interconnect Network) Solutions	Legacy MCUs Embedded Software	ST	STSW-ST7061 Description: LIN (Local Interconnect Network) Solutions
STSW-ST7062	Active	Emulated data EEPROM with ST7 HDFlash memory	Legacy MCUs Embedded Software	ST	STSW-ST7062 Description: Emulated data EEPROM with ST7 HDFlash memory
STSW-ST7065	Active	ST7 Software Examples	Legacy MCUs Embedded Software	ST	STSW-ST7065 Description: ST7 Software Examples
STSW-ST7066	Active	ST7 Software Library	Legacy MCUs Embedded Software	ST	STSW-ST7066 Description: ST7 Software Library
STSW-ST7072	Active	ST7MDT20 Training Exercises	Legacy MCUs Embedded Software	ST	STSW-ST7072 Description: ST7MDT20 Training Exercises
STSW-ST7079	Active	ST7 HDFLASH IAP example with the ST7MDT2-TRAIN board	Legacy MCUs Embedded Software	ST	STSW-ST7079 Description: ST7 HDFLASH IAP example with the ST7MDT2-TRAIN board
STSW-ST7085	Active	ST7 math utility routines	Legacy MCUs Embedded Software	ST	STSW-ST7085 Description: ST7 math utility routines
STSW-ST7086	Active	ST7 routine for I2C slave mode management	Legacy MCUs Embedded Software	ST	STSW-ST7086 Description: ST7 routine for I2C slave mode management
STSW-ST7087	Active	ST7 UART emulation software	Legacy MCUs Embedded Software	ST	STSW-ST7087 Description: ST7 UART emulation software
STSW-ST7088	Active	ST7 Software LCD driver	Legacy MCUs Embedded Software	ST	STSW-ST7088 Description: ST7 Software LCD driver
STSW-ST7089	Active	ST7 timer PWM duty cycle switch for true 0% or 100% duty cycle	Legacy MCUs Embedded Software	ST	STSW-ST7089 Description: ST7 timer PWM duty cycle switch for true 0% or 100% duty cycle
STSW-ST7090	Active	ST7 pCAN Peripheral Driver	Legacy MCUs Embedded Software	ST	STSW-ST7090 Description: ST7 pCAN Peripheral Driver
STSW-ST7091	Active	Software Techniques for compensating ST7 ADC Errors	Legacy MCUs Embedded Software	ST	STSW-ST7091 Description: Software Techniques for compensating ST7 ADC Errors
STSW-ST7092	Active	Generating a high resolution sinewave using ST7 PWMART	Legacy MCUs Embedded Software	ST	STSW-ST7092 Description: Generating a high resolution sinewave using ST7 PWMART
STSW-ST7093	Active	SMBus Slave Driver for ST7 I2C Peripherals	Legacy MCUs Embedded Software	ST	STSW-ST7093 Description: SMBus Slave Driver for ST7 I2C Peripherals
STSW-ST7094	Active	Software UART using ST7 12-Bit Autoreload Timer	Legacy MCUs Embedded Software	ST	STSW-ST7094 Description: Software UART using ST7 12-Bit Autoreload Timer
STSW-ST7096	Active	SCI communication between ST7 and PC	Legacy MCUs Embedded Software	ST	STSW-ST7096 Description: SCI communication between ST7 and PC
STSW-ST7097	Active	SPI Communication between ST7 and EEPROM	Legacy MCUs Embedded Software	ST	STSW-ST7097 Description: SPI Communication between ST7 and EEPROM
STSW-ST7098	Active	I2C Communication between ST7 and M24Cxx EEPROM	Legacy MCUs Embedded Software	ST	STSW-ST7098 Description: I2C Communication between ST7 and M24Cxx EEPROM
STSW-ST7099	Active	ST7 software SPI master communication	Legacy MCUs Embedded Software	ST	STSW-ST7099 Description: ST7 software SPI master communication
STSW-ST7100	Active	Real time clock with ST7 timer output compare	Legacy MCUs Embedded Software	ST	STSW-ST7100 Description: Real time clock with ST7 timer output compare
STSW-ST7101	Active	ST7 - Driving an analog keyboard with the ST7 ADC	Legacy MCUs Embedded Software	ST	STSW-ST7101 Description: ST7 - Driving an analog keyboard with the ST7 ADC

Software Development Tools

Part number	Status	Description	Type	Supplier
RIDE-STR	Active	Raisonance branded integrated development environment for ST7, STR7 and STR9 MCUs	Legacy MCUs IDEs	Raisonance	RIDE-STR Description: Raisonance branded integrated development environment for ST7, STR7 and STR9 MCUs
STSW-ST7009	Active	DFU Development Kit package (Device Firmware Upgrade).Contains all sources for the GUI and the DFU protocol layer.	Legacy MCUs Programmers	ST	STSW-ST7009 Description: DFU Development Kit package (Device Firmware Upgrade).Contains all sources for the GUI and the DFU protocol layer.
STVD-ST7	Active	ST Visual IDE for developing ST7 applications	Legacy MCUs Programmers	ST	STVD-ST7 Description: ST Visual IDE for developing ST7 applications
STVP-LIB-ST7	Active	STVP programming toolkit: C++ source files for creating PC programming interface	Legacy MCUs Programmers	ST	STVP-LIB-ST7 Description: STVP programming toolkit: C++ source files for creating PC programming interface
STVP-ST7	Active	ST Visual Programmer ST7	Legacy MCUs Programmers	ST	STVP-ST7 Description: ST Visual Programmer ST7

All resources

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	Resource title		Latest update

Product Specifications (1)

	Resource title		Latest update
PDF	DS3835 64/44-pin 8-bit MCU with 32 to 60K Flash/ROM, ADC, five timers, SPI, SCI, I2C interface 2.2		19 Sep 2016	19 Sep 2016 DS3835 64/44-pin 8-bit MCU with 32 to 60K Flash/ROM, ADC, five timers, SPI, SCI, I2C interface 2.2

Application Notes (5 of 63)

Technical Notes & Articles (1)

	Resource title		Latest update
PDF	TN1163 Description of WLCSP for microcontrollers and recommendations for its use 4.0		11 Jul 2017	11 Jul 2017 TN1163 Description of WLCSP for microcontrollers and recommendations for its use 4.0

User Manuals (2)

	Resource title		Latest update
PDF	UM0015 ST7 8-bit MCU family user guide 1.5		21 Jun 2019	21 Jun 2019 UM0015 ST7 8-bit MCU family user guide 1.5
PDF	UM0402 Single-phase multi tariff energy meter 1.3		09 May 2017	09 May 2017 UM0402 Single-phase multi tariff energy meter 1.3

Programming Manuals (4)

	Resource title	Latest update
PDF	PM0018 ST7 Flash programming quick reference guide 6.5	05 Feb 2021	05 Feb 2021 PM0018 ST7 Flash programming quick reference guide 6.5
PDF	PM0011 ST7 family Flash programming reference manual 2.5	17 May 2018	17 May 2018 PM0011 ST7 family Flash programming reference manual 2.5
PDF	PM0012 ST7 family ICC protocol reference manual 3.4	17 May 2018	17 May 2018 PM0012 ST7 family ICC protocol reference manual 3.4
PDF	PM0002 ST7 family programming manual 2.5	17 May 2018	17 May 2018 PM0002 ST7 family programming manual 2.5

Application Notes for related Tools & Software (5 of 7)

	Resource title	Latest update
PDF	AN2271 Ekey-Udisk solution 1.5	13 Sep 2018	13 Sep 2018 AN2271 Ekey-Udisk solution 1.5
PDF	AN971 I2C communication between ST7 and M24CXX EEPROM 1.7	01 Feb 2019	01 Feb 2019 AN971 I2C communication between ST7 and M24CXX EEPROM 1.7
PDF	AN1105 ST7 pCAN peripheral driver 1.7	16 May 2018	16 May 2018 AN1105 ST7 pCAN peripheral driver 1.7
PDF	AN1904 ST7MC three-phase AC induction motor control software library 3.4	13 Sep 2018	13 Sep 2018 AN1904 ST7MC three-phase AC induction motor control software library 3.4
PDF	AN1753 Software UART using ST7LITE0 12-bit autoreload timer 2.2	04 Jun 2019	04 Jun 2019 AN1753 Software UART using ST7LITE0 12-bit autoreload timer 2.2
PDF	AN1106 Translating assembly code from HC05 to ST7 1.7	10 Jul 2020	10 Jul 2020 AN1106 Translating assembly code from HC05 to ST7 1.7
PDF	AN1363/0701 Workaround to ISP mode limitation on the ST7MDT1-DVP2 and ST7MDT2-DVP2 1.5	16 Aug 2019	16 Aug 2019 AN1363/0701 Workaround to ISP mode limitation on the ST7MDT1-DVP2 and ST7MDT2-DVP2 1.5

Training Material (5 of 9)

	Resource title	Latest update
PDF	ST7 Training Part 1 : Introduction 1.0	30 Mar 2017	30 Mar 2017 ST7 Training Part 1 : Introduction 1.0
PDF	ST7 Training Part 2 : Core 1.0	30 Mar 2017	30 Mar 2017 ST7 Training Part 2 : Core 1.0
PDF	ST7 Training Part 3 : Addressing Modes 1.0	30 Mar 2017	30 Mar 2017 ST7 Training Part 3 : Addressing Modes 1.0
PDF	ST7 Training Part 4 : Assembly Toolchain 1.0	30 Mar 2017	30 Mar 2017 ST7 Training Part 4 : Assembly Toolchain 1.0
PDF	ST7 Training Part 5 : Debugger 1.0	30 Mar 2017	30 Mar 2017 ST7 Training Part 5 : Debugger 1.0
PDF	ST7 Training Part 6 : Hardware Tools 1.0	30 Mar 2017	30 Mar 2017 ST7 Training Part 6 : Hardware Tools 1.0
PDF	ST7 Training Part 7 : Peripherals 1.0	30 Mar 2017	30 Mar 2017 ST7 Training Part 7 : Peripherals 1.0
PDF	ST7 Training Part 8 : Realizer 1.0	30 Mar 2017	30 Mar 2017 ST7 Training Part 8 : Realizer 1.0
PDF	ST7 Training Part 9 : Cosmic Compiler 1.0	30 Mar 2017	30 Mar 2017 ST7 Training Part 9 : Cosmic Compiler 1.0

Product Certifications (1)

	Resource title		Latest update
PDF	ST72F324B Qualification Certificate 1.0		30 Mar 2017	30 Mar 2017 ST72F324B Qualification Certificate 1.0

EDA Symbols, Footprints and 3D Models

All resources

Expand all categories

	Resource title		Latest update

Board Manufacturing Specifications (1)

	Resource title		Latest update
ZIP	Gerber files for PIR PCB (AN1828) 1.0		31 Mar 2016	31 Mar 2016 Gerber files for PIR PCB (AN1828) 1.0

Quality and Reliability

Part Number	Marketing Status	Package	Grade	RoHS Compliance Grade	Material Declaration**
ST72F321AR6T3	NRND	LQFP 64 10x10x1.4 mm	Industrial	Ecopack2
ST72F321AR6T6	NRND	LQFP 64 10x10x1.4 mm	Industrial	Ecopack2

ST72F321AR6T3

Package:

LQFP 64 10x10x1.4 mm

Material Declaration**:

More Info

ST72F321AR6T6

Package:

LQFP 64 10x10x1.4 mm

Material Declaration**:

More Info

(**) The Material Declaration forms available on st.com may be generic documents based on the most commonly used package within a package family. For this reason, they may not be 100% accurate for a specific device. Please contact our sales support for information on specific devices.

Sample & Buy

Part Number	Order from Distributors	Order from ST	Marketing Status	ECCN (US)	ECCN (EU)	Packing Type	Package	Temperature (°C)		Country of Origin	Budgetary Price (US$)*/Qty
Part Number	Order from Distributors	Order from ST	Marketing Status	ECCN (US)	ECCN (EU)	Packing Type	Package	min	max	Country of Origin	Budgetary Price (US$)*/Qty
ST72F321AR6T6	No availability of distributors reported, please contact our sales office		NRND	EAR99	NEC	Tray	LQFP 64 10x10x1.4 mm	-40	85	MALAYSIA
ST72F321AR6T3	No availability of distributors reported, please contact our sales office		NRND	EAR99	NEC	Tray	LQFP 64 10x10x1.4 mm	-40	125	MALAYSIA

ST72F321AR6T6

Marketing Status

NRND

ECCN (US)

EAR99

More Info

Budgetary Price (US$)*/Qty

ST72F321AR6T3

Marketing Status

NRND

ECCN (US)

EAR99

More Info

Budgetary Price (US$)*/Qty

(*) Suggested Resale Price per unit (USD) for BUDGETARY USE ONLY. For quotes, prices in local currency, please contact your local ST Sales Office or our Distributors