STM32C031K6

ARM Cortex-M0+ 32-bit MCU

The STM32C031K6 is a arm cortex-m0+ 32-bit mcu from STMicroelectronics. View the full STM32C031K6 datasheet below including key specifications, electrical characteristics, absolute maximum ratings.

Manufacturer

STMicroelectronics

Key Specifications

Parameter	Value
Connectivity	I2C, IrDA, LINbus, SPI, UART/USART
Core Processor	ARM® Cortex®-M0+
Core Size	32-Bit
Data Converters	A/D 17x12b SAR
DigiKey Programmable	Not Verified
Mounting Type	Surface Mount
Number of I/O	26
Operating Temperature	-40°C ~ 85°C (TA)
Oscillator Type	External, Internal
Package / Case	28-UFQFN
Peripherals	Brown-out Detect/Reset, POR, PWM, Temp Sensor, WDT
Flash Memory Size	32KB (32K x 8)
Program Memory Type	FLASH
RAM Size	12K x 8 B
Clock Speed	48MHz
Supplier Device Package	28-UFQFPN (4x4)
Supply Voltage	2V ~ 3.6V

Overview

Part: STM32C031x4/x6 — STMicroelectronics

Type: ARM Cortex-M0+ 32-bit MCU

Description: 32-bit ARM Cortex-M0+ MCU operating at up to 48 MHz with up to 32 KB Flash, 12 KB SRAM, 2 USARTs, 1 SPI, 1 I2C, 12-bit ADC, and multiple timers.

Operating Conditions:

Supply voltage: 2.0 V to 3.6 V
Operating temperature: -40 to 85 °C (suffix-dependent — see Features for grade-specific ranges)
CPU frequency: up to 48 MHz

Absolute Maximum Ratings:

Max supply voltage: 4.0 V (VDD, VDDA)
Max junction/storage temperature: 150 °C

Key Specs:

CPU: Arm Cortex-M0+
Max CPU frequency: 48 MHz
Flash memory: up to 32 Kbytes
SRAM: 12 Kbytes with parity check
ADC resolution: 12-bit
ADC conversion rate: 0.4 μs (2.5 MSps)
I2C speed: 1 Mbit/s (Fast-mode Plus)
SPI speed: 24 Mbit/s

Features:

Memory protection unit (MPU)
Low-power modes: Sleep, Stop, Standby, Shutdown
Clock management: 4-48 MHz crystal oscillator, 32 kHz crystal oscillator, internal 48 MHz RC oscillator (±1%), internal 32 kHz RC oscillator (±5%)
Up to 45 fast I/Os, all 5 V-tolerant
3-channel DMA controller
8 timers: 1 advanced motor control (16-bit), 4 general-purpose (16-bit), 2 watchdogs, SysTick
Calendar RTC with alarm
Serial wire debug (SWD)

Applications:

Consumer
Industrial
Appliance
Internet of Things (IoT) solutions

Package:

TSSOP20
UFQFPN28
LQFP32
UFQFPN32
LQFP48
UFQFPN48

Features

Includes ST state-of-the-art patented technology
Core: Arm ® 32-bit Cortex ® -M0+ CPU, frequency up to 48 MHz
-40°C to 85°C/105°C/125°C operating temperature
Memories
-Up to 32 Kbytes of flash memory with protection
-12 Kbytes of SRAM with hardware parity check
CRC calculation unit
Reset and power management
-Voltage range: 2.0 V to 3.6 V
-Power-on / power-down reset (POR/PDR)
-Programmable brownout reset (BOR)
-Low-power modes: Sleep, Stop, Standby, Shutdown
Clock management
-4 to 48 MHz crystal oscillator
-32 kHz crystal oscillator with calibration
-Internal 48 MHz RC oscillator (±1 %)
-Internal 32 kHz RC oscillator (±5 %)
Up to 45 fast I/Os
-All mappable on external interrupt vectors
-All 5 V-tolerant
3-channel DMA controller with flexible mapping
12-bit, 0.4 μs ADC (up to 19 ext. channels) -Conversion range: 0 to 3.6 V
8 timers: 16-bit for advanced motor control, four 16-bit general-purpose, two watchdogs, SysTick timer
Calendar RTC with alarm

Pin Configuration

Figure 3. STM32C031FxP TSSOP20 pinout

Figure 4. STM32C031GxU UFQFPN28 pinout

Figure 5. STM32C031KxT LQFP32 pinout

Figure 6. STM32C031KxU UFQFPN32 pinout

Figure 7. STM32C031CxT LQFP48 pinout

Figure 8. STM32C031CxU UFQFPN48 pinout

Table 11. Terms and symbols used in the pin assignment table

Column	Definition to its by-default function at reset, unless otherwise pin name.	Symbol Pin name Terminal name corresponds parenthesis under the
Supply pin	Supply pin
I	Input only pin pin FT 5 V tolerant I/O	Pin type
Functions Functions	Functions Functions Options for FT I/Os	RST
	_a	_a
	Note set as analog inputs, unless otherwise specified.	Upon reset, all I/Os are Pin functions
	Alternate functions	selected through GPIOx_AFR registers
Additional functions	directly selected/enabled through peripheral registers	directly selected/enabled through peripheral registers

Table 12. Pin assignment and description

Pin	Pin	Pin	Pin	Pin	Pin
TSSOP20	UFQFPN28	LQFP32	UFQFPN32	LQFP48	UFQFPN48
-	-	-	-	1	1
-	-	-	-	2	2
2	1	2	2	-	-
3	2	3	3	3	3
-	-	-	-	4	4

Table 12. Pin assignment and description

Table 12. Pin assignment and description (continued)

Pin	Pin	Pin	Pin	Pin	Pin
TSSOP20	UFQFPN28	LQFP32	UFQFPN32	LQFP48	UFQFPN48
-	-	-	-	5	5
4	3	4	4	6	6
5	4	5	5	7	7
-	-	-	-	8	8
-	-	-	-	9	9
6	5	6	6	10	10
7	6	7	7	11	11
8	7	8	8	12	12
9	8	9	9	13	13
10	9	10	10	14	14
-	-	-	-	15	15
11	10	11	11	-	-
12	11	12	12	16	16
13	12	13	13	17	17
14	13	14	14	18	18
-	14	15	15	19	19
-	15	16	16	20	20
-	-	17	17	21	21
-	-	-	-	22	22

Table 12. Pin assignment and description (continued)

Electrical Characteristics

The definition and values of input/output AC characteristics are given in Figure 20 and Table 52 , respectively.

Unless otherwise specified, the parameters given are derived from tests performed under the ambient temperature and supply voltage conditions summarized in Table 24: General operating conditions .

Table 52. I/O AC characteristics (1)(2)

Symbol	Parameter	Conditions	Min	Max	Unit
Fmax	Maximum frequency	C=50 pF, 2.7 V ≤ V DD ≤ 3.6 V	-	2	MHz
Fmax	Maximum frequency	C=50 pF, 2 V ≤ V DD ≤ 2.7 V	-	0.35	MHz
Fmax	Maximum frequency	C=10 pF, 2.7 V ≤ V DD ≤ 3.6 V	-	3	MHz
Fmax	Maximum frequency	C=10 pF, 2 V ≤ V DD ≤ 2.7 V	-	0.45	MHz
Tr/Tf	Output rise and fall time (3)	C=50 pF,2.7 V ≤ V DD ≤ 3.6 V	-	100	ns
Tr/Tf	Output rise and fall time (3)	C=50 pF, 2 V ≤ V DD ≤ 2.7 V	-	225	ns
Tr/Tf	Output rise and fall time (3)	C=10 pF, 2.7 V ≤ V DD ≤ 3.6 V	-	75	ns
Tr/Tf	Output rise and fall time (3)	C=10 pF, 2 V ≤ V DD ≤ 2.7 V	-	150	ns

Table 52. I/O AC characteristics (1)(2)

Table 52. I/O AC characteristics (1)(2) (continued)

Speed	Symbol	Parameter	Conditions	Min	Max	Unit
01			C=50 pF, 2.7 V ≤ V DD ≤ 3.6 V	-	10.00	MHz
01	Fmax	Maximum frequency	C=50 pF, 2 V ≤ V DD ≤ 2.7 V	-	2.00	MHz
01			C=10 pF, 2.7 V ≤ V DD ≤ 3.6 V	-	15.00	MHz
01			C=10 pF, 2 V ≤ V DD ≤ 2.7 V	-	2.50	MHz
	Tr/Tf	rise and fall time (3)	C=50 pF, 2.7 V ≤ V DD ≤ 3.6 V	-	30.00	ns
	Tr/Tf	rise and fall time (3)	C=50 pF, 2 V ≤ V DD ≤ 2.7 V	-	60.00	ns
	Tr/Tf	rise and fall time (3)	C=10 pF, 2.7 V ≤ V DD ≤ 3.6 V	-	15.00	ns
	Tr/Tf	rise and fall time (3)	C=10 pF, 2 V ≤ V DD ≤ 2.7 V	-	30.00	ns
10	Fmax	Maximum frequency C=50 C=50	pF, 2.7 V ≤ V DD ≤ 3.6 V	-	30.00	MHz
10	Fmax	Maximum frequency C=50 C=50	pF, 2 V ≤ V DD ≤ 2.7 V	-	15.00	MHz
10	Fmax	Maximum frequency C=50 C=50	C=10 pF, 2.7 V ≤ V DD ≤ 3.6 V	-	60.00 (4)	MHz
10	Fmax	Maximum frequency C=50 C=50	C=10 pF, 2 V ≤ V DD ≤ 2.7 V	-	30.00	MHz
10	Tr/Tf	rise and fall time (3)	C=50 pF, 2.7 V ≤ V DD ≤ 3.6 V	-	11.00	ns
10	Tr/Tf	rise and fall time (3)	C=50 pF, 2 V ≤ V DD ≤ 2.7 V	-	22.00	ns
10	Tr/Tf	rise and fall time (3)	C=10 pF, 2.7 V ≤ V DD ≤ 3.6 V	-	4.00	ns
10	Tr/Tf	rise and fall time (3)	C=10 pF, 2 V ≤ V DD ≤ 2.7 V	-	8.00	ns
11	Fmax	Maximum frequency	C=30 pF, 2.7 V ≤ V DD ≤ 3.6 V	-	60.00 (4)	MHz
11	Fmax	Maximum frequency	C=30 pF, 2 V ≤ V DD ≤ 2.7 V	-	30.00	MHz
11	Fmax	Maximum frequency	C=10 pF, 2.7 V ≤ V DD ≤ 3.6 V	-	80.00 (4)	MHz
11	Fmax	Maximum frequency	C=10 pF, 2 V ≤ V DD ≤ 2.7 V	-	40.00	MHz
		rise and fall time (3) C=30 C=30	pF, 2.7 V ≤ V DD ≤ 3.6 V	-	5.50	ns
	Tr/Tf	rise and fall time (3) C=30 C=30	pF, 2 V ≤ V DD ≤ 2.7 V	-	11.00	ns
		rise and fall time (3) C=30 C=30	C=10 pF, 2.7 V ≤ V DD ≤ 3.6 V	-	2.50	ns
		rise and fall time (3) C=30 C=30	C=10 pF, 2 V ≤ V DD ≤ 2.7 V	-	5.00	ns

The fall time is defined between 70% and 30% of the output waveform, according to I 2 C specification.
This value represents the I/O capability but the maximum system frequency is limited to 48 MHz.

Figure 20. I/O AC characteristics definition (1)

Refer to Table 52: I/O AC characteristics .

Absolute Maximum Ratings

Stresses above the absolute maximum ratings listed in Table 21 , Table 22 and Table 23 may cause permanent damage to the device. These are stress ratings only and functional operation of the device at these conditions is not implied. Exposure to maximum rating conditions for extended periods may affect device reliability. The device mission profile (application conditions) is compliant with the JEDEC JESD47 qualification standard.

All voltages are defined with respect to V SS .

Table 21. Voltage characteristics

Symbol	Ratings	Min	Max	Unit
V DD - V SS	External supply voltage	- 0.3	4.0	V
V REF+	External voltage on VREF+ pin	- 0.3	Min(V DD + 0.4, 4.0)	V
V IN (1)	Input voltage on pin	- 0.3	V DD + 4.0 (2)(3)	V

Table 22. Current characteristics

Symbol	Ratings	Max	Unit
I VDD/VDDA	Current into VDD/VDDA power pin (source)	100	mA
I VSS/VSSA	Current out of VSS/VSSA ground pin (sink)	100	mA
I IO(PIN)	Output current sunk by any I/O and control pin	20	mA
I IO(PIN)	Output current sourced by any I/O and control pin	20	mA
∑ I (PIN)	Total output current sunk by sum of all I/Os and control pins (1)	80	mA
∑ I (PIN)	Total output current sourced by sum of all I/Os and control pins (1)	80	mA
I INJ(PIN) (1)(2)	Injected current on a FT_xx pin	-5 / 0	mA
∑ I INJ(PIN)	Total injected current (sum of all I/Os and control pins) (3)	-25	mA

Table 23. Thermal characteristics

Symbol	Ratings	Value	Unit
T STG	Storage temperature range	-65 to +150	°C
T J	Maximum junction temperature	130	°C

Table 23. Thermal characteristics

Thermal Information

The operating junction temperature T J must never exceed the maximum given in Table 24: General operating conditions .

The maximum junction temperature in °C that the device can reach if respecting the operating conditions, is:

Package Information

In order to meet environmental requirements, ST offers these devices in different grades of ECOPACK packages, depending on their level of environmental compliance. ECOPACK specifications, grade definitions and product status are available at: www.st.com . ECOPACK is an ST trademark.

Related Variants

The following components are covered by the same datasheet.

Part Number	Manufacturer	Package
STM32C031C4	STMicroelectronics	—
STM32C031C6	STMicroelectronics	—
STM32C031F4	STMicroelectronics	—
STM32C031F6	STMicroelectronics	—
STM32C031G4	STMicroelectronics	—
STM32C031G6	STMicroelectronics	—
STM32C031G6U6	STMicroelectronics	28-UFQFN
STM32C031K4	STMicroelectronics	—
STM32C031X4/X6	STMicroelectronics	—

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