STM32L422xx
Ultra-low-power Arm
®
Cortex
®
-M4 32-bit MCU+FPU, 100DMIPS,
128KB Flash, 40KB SRAM, analog, AES
Datasheet
-
production data
Features
•
Ultra-low-power with FlexPowerControl
– 1.71 V to 3.6 V power supply
– -40 °C to 85/125 °C temperature range
– 300 nA in V
BAT
mode: supply for RTC and
32x32-bit backup registers
– 16 nA Shutdown mode (4 wakeup pins)
– 32 nA Standby mode (4 wakeup pins)
– 245 nA Standby mode with RTC
– 0.7 µA Stop 2 mode, 0.95 µA with RTC
– 79 µA/MHz run mode (LDO Mode)
– Batch acquisition mode (BAM)
– 4 µs wakeup from Stop mode
– Brown out reset (BOR)
– Interconnect matrix
•
Core: Arm
®
32-bit Cortex
®
-M4 CPU with FPU,
Adaptive real-time accelerator (ART
Accelerator™) allowing 0-wait-state execution
from Flash memory, frequency up to 80 MHz,
MPU, 100DMIPS and DSP instructions
•
Performance benchmark
– 1.25 DMIPS/MHz (Drystone 2.1)
– 273.55 CoreMark
®
(3.42 CoreMark/MHz @
80 MHz)
•
Energy benchmark
– 442 ULPMark-CP
®
– 165 ULPMark-PP
®
•
Clock Sources
– 4 to 48 MHz crystal oscillator
– 32 kHz crystal oscillator for RTC (LSE)
– Internal 16 MHz factory-trimmed RC (±1%)
– Internal low-power 32 kHz RC (±5%)
– Internal multispeed 100 kHz to 48 MHz
oscillator, auto-trimmed by LSE (better than
±0.25 % accuracy)
– Internal 48 MHz with clock recovery
– PLL for system clock
LQFP32 (7x7 mm) UFBGA64 (5x5 mm) UFQFPN32 (5x5 mm)
LQFP48 (7x7 mm)
UFQFPN48 (7x7 mm)
LQFP64 (10x10 mm)
WLCSP36
(2.6x3.1 mm)
•
Up to 52 fast I/Os, most 5 V-tolerant
•
RTC with HW calendar, alarms and calibration
•
Up to 12 capacitive sensing channels: support
touchkey, linear and rotary touch sensors
•
10x timers: 1x 16-bit advanced motor-control,
1x 32-bit and 2x 16-bit general purpose, 1x 16-
bit basic, 2x low-power 16-bit timers (available
in Stop mode), 2x watchdogs, SysTick timer
•
Memories
– 128 KB single bank Flash, proprietary code
readout protection
– 40 KB of SRAM including 8 KB with
hardware parity check
– Quad SPI memory interface with XIP
capability
•
Rich analog peripherals (independent supply)
– 2x 12-bit ADC 5 Msps, up to 16-bit with
hardware oversampling, 200 µA/Msps
– 2x operational amplifiers with built-in PGA
– 1x ultra-low-power comparator
– Accurate 2.5 V or 2.048 V reference
voltage buffered output
•
AES: 128/256-bit key encryption hardware
accelerator
•
12x communication interfaces
– USB 2.0 full-speed crystal less solution
with LPM and BCD
– 3x I2C FM+(1 Mbit/s), SMBus/PMBus
– 3x USARTs (ISO 7816, LIN, IrDA, modem)
– 1x LPUART (Stop 2 wake-up)
– 2x SPIs (and 1x Quad SPI)
– IRTIM (Infrared interface)
•
14-channel DMA controller
June 2019
This is information on a product in full production.
DS12470 Rev 5
1/184
www.st.com
STM32L422xx
•
True random number generator
•
CRC calculation unit, 96-bit unique ID
•
Development support: serial wire debug
(SWD), JTAG, Embedded Trace Macrocell™
•
All packages are ECOPACK2
®
compliant
Table 1. Device summary
Part numbers
Reference
STM32L422xx
STM32L422CB, STM32L422KB, STM32L422RB, STM32L422TB
2/184
DS12470 Rev 5
STM32L422xx
Contents
Contents
1
2
3
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Functional overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
3.1
3.2
3.3
3.4
3.5
3.6
3.7
3.8
3.9
Arm
®
Cortex
®
-M4 core with FPU . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Adaptive real-time memory accelerator (ART Accelerator™) . . . . . . . . . 16
Memory protection unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Embedded Flash memory . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Embedded SRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Firewall . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Boot modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Cyclic redundancy check calculation unit (CRC) . . . . . . . . . . . . . . . . . . . 19
Power supply management . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
3.9.1
3.9.2
3.9.3
3.9.4
3.9.5
3.9.6
Power supply schemes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Power supply supervisor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Voltage regulator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Low-power modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Reset mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
VBAT operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
3.10
3.11
3.12
3.13
3.14
Interconnect matrix . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Clocks and startup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
General-purpose inputs/outputs (GPIOs) . . . . . . . . . . . . . . . . . . . . . . . . . 35
Direct memory access controller (DMA) . . . . . . . . . . . . . . . . . . . . . . . . . . 35
Interrupts and events . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
3.14.1
3.14.2
Nested vectored interrupt controller (NVIC) . . . . . . . . . . . . . . . . . . . . . . 36
Extended interrupt/event controller (EXTI) . . . . . . . . . . . . . . . . . . . . . . 36
Temperature sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
Internal voltage reference (VREFINT) . . . . . . . . . . . . . . . . . . . . . . . . . . 38
VBAT battery voltage monitoring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
3.15
Analog to digital converter (ADC) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
3.15.1
3.15.2
3.15.3
3.16
Comparators (COMP) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
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Contents
STM32L422xx
3.17
3.18
3.19
3.20
3.21
Operational amplifier (OPAMP) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
Touch sensing controller (TSC) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
Random number generator (RNG) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
Advanced encryption standard hardware accelerator (AES) . . . . . . . . . . 40
Timers and watchdogs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
3.21.1
3.21.2
3.21.3
3.21.4
3.21.5
3.21.6
3.21.7
3.21.8
Advanced-control timer (TIM1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
General-purpose timers (TIM2, TIM15, TIM16) . . . . . . . . . . . . . . . . . . . 42
Basic timer (TIM6) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
Low-power timer (LPTIM1 and LPTIM2) . . . . . . . . . . . . . . . . . . . . . . . . 42
Infrared interface (IRTIM) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
Independent watchdog (IWDG) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
System window watchdog (WWDG) . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
SysTick timer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
3.22
3.23
3.24
3.25
3.26
3.27
3.28
3.29
3.30
Real-time clock (RTC) and backup registers . . . . . . . . . . . . . . . . . . . . . . 44
Inter-integrated circuit interface (I
2
C) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
Universal synchronous/asynchronous receiver transmitter (USART) . . . 46
Low-power universal asynchronous receiver transmitter (LPUART) . . . . 47
Serial peripheral interface (SPI) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
Universal serial bus (USB) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
Clock recovery system (CRS) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
Quad SPI memory interface (QUADSPI) . . . . . . . . . . . . . . . . . . . . . . . . . 48
Development support . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
3.30.1
3.30.2
Serial wire JTAG debug port (SWJ-DP) . . . . . . . . . . . . . . . . . . . . . . . . . 50
Embedded Trace Macrocell™ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
4
5
6
Pinouts and pin description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
Memory mapping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67
Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71
6.1
Parameter conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71
6.1.1
6.1.2
6.1.3
6.1.4
6.1.5
Minimum and maximum values . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71
Typical values . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71
Typical curves . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71
Loading capacitor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71
Pin input voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71
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6.1.7
Contents
Power supply scheme . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72
Current consumption measurement . . . . . . . . . . . . . . . . . . . . . . . . . . . 73
6.2
6.3
Absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73
Operating conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75
6.3.1
6.3.2
6.3.3
6.3.4
6.3.5
6.3.6
6.3.7
6.3.8
6.3.9
6.3.10
6.3.11
6.3.12
6.3.13
6.3.14
6.3.15
6.3.16
6.3.17
6.3.18
6.3.19
6.3.20
6.3.21
6.3.22
6.3.23
6.3.24
General operating conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75
Operating conditions at power-up / power-down . . . . . . . . . . . . . . . . . . 76
Embedded reset and power control block characteristics . . . . . . . . . . . 76
Embedded voltage reference . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 79
Supply current characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81
Wakeup time from low-power modes and voltage scaling
transition times . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 102
External clock source characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . 105
Internal clock source characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . 110
PLL characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 117
Flash memory characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 118
EMC characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 119
Electrical sensitivity characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . 120
I/O current injection characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . 121
I/O port characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 122
NRST pin characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 127
Extended interrupt and event controller input (EXTI) characteristics . . 128
Analog switches booster . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 128
Analog-to-Digital converter characteristics . . . . . . . . . . . . . . . . . . . . . 129
Comparator characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 142
Operational amplifiers characteristics . . . . . . . . . . . . . . . . . . . . . . . . . 143
Temperature sensor characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . 146
V
BAT
monitoring characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 147
Timer characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 147
Communication interfaces characteristics . . . . . . . . . . . . . . . . . . . . . . 148
7
Package information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 156
7.1
7.2
7.3
7.4
7.5
LQFP64 package information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 156
UFBGA64 package information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 159
LQFP48 package information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 162
UFQFPN48 package information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 166
WLCSP36 package information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 169
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