STM32L151x6/8/B
STM32L152x6/8/B
Ultra-low-power 32-bit MCU ARM®-based Cortex®-M3,
128KB Flash, 16KB SRAM, 4KB EEPROM, LCD, USB, ADC, DAC
Datasheet - production data
Features
• Ultra-low-power platform
– 1.65 V to 3.6 V power supply
– -40°C to 85°C/105°C temperature range
– 0.3 µA Standby mode (3 wakeup pins)
– 0.9 µA Standby mode + RTC
– 0.57 µA Stop mode (16 wakeup lines)
– 1.2 µA Stop mode + RTC
– 9 µA Low-power run mode
– 214 µA/MHz Run mode
– 10 nA ultra-low I/O leakage
– < 8 µs wakeup time
• Core: ARM® Cortex®-M3 32-bit CPU
– From 32 kHz up to 32 MHz max
– 1.25 DMIPS/MHz (Dhrystone 2.1)
– Memory protection unit
• Reset and supply management
– Ultra-safe, low-power BOR (brownout
reset) with 5 selectable thresholds
– Ultra-low-power POR/PDR
– Programmable voltage detector (PVD)
• Clock sources
– 1 to 24 MHz crystal oscillator
– 32 kHz oscillator for RTC with calibration
– High Speed Internal 16 MHz factorytrimmed RC (+/- 1%)
– Internal low-power 37 kHz RC
– Internal multispeed low-power 65 kHz to
4.2 MHz
– PLL for CPU clock and USB (48 MHz)
• Pre-programmed bootloader
– USART supported
• Development support
– Serial wire debug supported
– JTAG and trace supported
• Up to 83 fast I/Os (73 I/Os 5V tolerant), all
mappable on 16 external interrupt vectors
• Memories
– Up to 128 KB Flash with ECC
– Up to 16 KB RAM
January 2015
This is information on a product in full production.
LQFP100 14 × 14 mm UFBGA100 7 × 7 mm UFQFPN48 7 × 7 mm
LQFP64 10 × 10 mm
TFBGA64 5 × 5 mm
LQFP48 7 × 7 mm
– Up to 4 KB of true EEPROM with ECC
– 80 Byte backup register
• LCD Driver (except STM32L151x/6/8/B
devices) for up to 8x40 segments
– Support contrast adjustment
– Support blinking mode
– Step-up converter on board
• Rich analog peripherals (down to 1.8 V)
– 12-bit ADC 1 Msps up to 24 channels
– 12-bit DAC 2 channels with output buffers
– 2x ultra-low-power-comparators
(window mode and wake up capability)
• DMA controller 7x channels
• 8x peripherals communication interface
– 1x USB 2.0 (internal 48 MHz PLL)
– 3x USART (ISO 7816, IrDA)
– 2x SPI 16 Mbits/s
– 2x I2C (SMBus/PMBus)
• 10x timers: 6x 16-bit with up to 4 IC/OC/PWM
channels, 2x 16-bit basic timers, 2x watchdog
timers (independent and window)
• Up to 20 capacitive sensing channels
supporting touchkey, linear and rotary touch
sensors
• CRC calculation unit, 96-bit unique ID
Table 1. Device summary
Reference
Part number
STM32L151x6/8/B
STM32L151CB, STM32L151C8,
STM32L151C6, STM32L151RB,
STM32L151R8, STM32L151R6,
STM32L151VB, STM32L151V8
STM32L152x6/8/B
STM32L152CB, STM32L152C8,
STM32L152C6, STM32L152RB,
STM32L152R8, STM32L152R6,
STM32L152VB, STM32L152V8
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www.st.com
Contents
STM32L151x6/8/B, STM32L152x6/8/B
Contents
1
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
2
Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
3
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2.1
Device overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11
2.2
Ultra-low-power device continuum . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
2.2.1
Performance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
2.2.2
Shared peripherals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
2.2.3
Common system strategy . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
2.2.4
Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Functional overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
3.1
Low power modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
3.2
ARM® Cortex®-M3 core with MPU . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
3.3
Reset and supply management . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
3.3.1
Power supply schemes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
3.3.2
Power supply supervisor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
3.3.3
Voltage regulator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
3.3.4
Boot modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
3.4
Clock management . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
3.5
Low power real-time clock and backup registers . . . . . . . . . . . . . . . . . . . 23
3.6
GPIOs (general-purpose inputs/outputs) . . . . . . . . . . . . . . . . . . . . . . . . . 23
3.7
Memories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
3.8
DMA (direct memory access) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
3.9
LCD (liquid crystal display) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
3.10
ADC (analog-to-digital converter) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
3.10.1
Temperature sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
3.10.2
Internal voltage reference (VREFINT) . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
3.11
DAC (digital-to-analog converter) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
3.12
Ultra-low-power comparators and reference voltage . . . . . . . . . . . . . . . . 26
3.13
Routing interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
3.14
Touch sensing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
3.15
Timers and watchdogs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
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Contents
3.15.1
General-purpose timers (TIM2, TIM3, TIM4, TIM9, TIM10 and TIM11) . 28
3.15.2
Basic timers (TIM6 and TIM7) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
3.15.3
SysTick timer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
3.15.4
Independent watchdog (IWDG) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
3.15.5
Window watchdog (WWDG) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Communication interfaces . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
3.16.1
I²C bus . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
3.16.2
Universal synchronous/asynchronous receiver transmitter (USART) . . 29
3.16.3
Serial peripheral interface (SPI) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
3.16.4
Universal serial bus (USB) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
3.17
CRC (cyclic redundancy check) calculation unit . . . . . . . . . . . . . . . . . . . 30
3.18
Development support . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
4
Pin descriptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
5
Memory mapping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
6
Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
6.1
Parameter conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
6.1.1
Minimum and maximum values . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
6.1.2
Typical values . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
6.1.3
Typical curves . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
6.1.4
Loading capacitor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
6.1.5
Pin input voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
6.1.6
Power supply scheme . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
6.1.7
Optional LCD power supply scheme . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
6.1.8
Current consumption measurement . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
6.2
Absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
6.3
Operating conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
6.3.1
General operating conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
6.3.2
Embedded reset and power control block characteristics . . . . . . . . . . . 54
6.3.3
Embedded internal reference voltage . . . . . . . . . . . . . . . . . . . . . . . . . . 56
6.3.4
Supply current characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
6.3.5
Wakeup time from Low power mode . . . . . . . . . . . . . . . . . . . . . . . . . . . 69
6.3.6
External clock source characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . 70
6.3.7
Internal clock source characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . 75
6.3.8
PLL characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77
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STM32L151x6/8/B, STM32L152x6/8/B
6.3.9
Memory characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 78
6.3.10
EMC characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 79
6.3.11
Electrical sensitivity characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81
6.3.12
I/O current injection characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81
6.3.13
I/O port characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83
6.3.14
NRST pin characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 86
6.3.15
TIM timer characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 87
6.3.16
Communication interfaces . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 88
6.3.17
12-bit ADC characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 94
6.3.18
DAC electrical specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100
6.3.19
Temperature sensor characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . 102
6.3.20
Comparator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 103
6.3.21
LCD controller (STM32L152xx only) . . . . . . . . . . . . . . . . . . . . . . . . . . 105
Package characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 106
7.1
Package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 106
7.2
Thermal characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 123
7.2.1
Reference document . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 124
8
Part numbering . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 125
9
Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 126
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List of tables
List of tables
Table 1.
Table 2.
Table 3.
Table 4.
Table 5.
Table 6.
Table 7.
Table 8.
Table 9.
Table 10.
Table 11.
Table 12.
Table 13.
Table 14.
Table 15.
Table 16.
Table 17.
Table 18.
Table 19.
Table 20.
Table 21.
Table 22.
Table 23.
Table 24.
Table 25.
Table 26.
Table 27.
Table 28.
Table 29.
Table 30.
Table 31.
Table 32.
Table 33.
Table 34.
Table 35.
Table 36.
Table 37.
Table 38.
Table 39.
Table 40.
Table 41.
Table 42.
Table 43.
Table 44.
Table 45.
Table 46.
Table 47.
Device summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Ultra-low-power STM32L151x6/8/B and STM32L152x6/8/B device features and
peripheral counts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Functionalities depending on the operating power supply range . . . . . . . . . . . . . . . . . . . . 15
CPU frequency range depending on dynamic voltage scaling . . . . . . . . . . . . . . . . . . . . . . 16
Working mode-dependent functionalities (from Run/active down to standby) . . . . . . . . . . 17
Timer feature comparison . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Legend/abbreviations used in the pinout table . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
STM32L151x6/8/B and STM32L152x6/8/B pin definitions . . . . . . . . . . . . . . . . . . . . . . . . . 37
Alternate function input/output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
Voltage characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
Current characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
Thermal characteristics. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
General operating conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
Embedded reset and power control block characteristics. . . . . . . . . . . . . . . . . . . . . . . . . . 54
Embedded internal reference voltage calibration values . . . . . . . . . . . . . . . . . . . . . . . . . . 56
Embedded internal reference voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56
Current consumption in Run mode, code with data processing running from Flash. . . . . . 58
Current consumption in Run mode, code with data processing running from RAM . . . . . . 59
Current consumption in Sleep mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60
Current consumption in Low power run mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62
Current consumption in Low power sleep mode. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63
Typical and maximum current consumptions in Stop mode . . . . . . . . . . . . . . . . . . . . . . . . 64
Typical and maximum current consumptions in Standby mode . . . . . . . . . . . . . . . . . . . . . 66
Peripheral current consumption . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67
Low-power mode wakeup timings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69
High-speed external user clock characteristics. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70
Low-speed external user clock characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71
HSE oscillator characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72
LSE oscillator characteristics (fLSE = 32.768 kHz) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73
HSI oscillator characteristics. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75
LSI oscillator characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75
MSI oscillator characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76
PLL characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77
RAM and hardware registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 78
Flash memory and data EEPROM characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 78
Flash memory, data EEPROM endurance and data retention . . . . . . . . . . . . . . . . . . . . . . 79
EMS characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 79
EMI characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 80
ESD absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81
Electrical sensitivities . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81
I/O current injection susceptibility . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82
I/O static characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83
Output voltage characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 84
I/O AC characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 85
NRST pin characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 86
TIMx characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 87
I2C characteristics. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 88
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List of tables
Table 48.
Table 49.
Table 50.
Table 51.
Table 52.
Table 53.
Table 54.
Table 55.
Table 56.
Table 57.
Table 58.
Table 59.
Table 60.
Table 61.
Table 62.
Table 63.
Table 64.
Table 65.
Table 66.
Table 67.
Table 68.
Table 69.
Table 70.
Table 71.
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SCL frequency (fPCLK1= 32 MHz, VDD = VDD_I2C = 3.3 V). . . . . . . . . . . . . . . . . . . . . . . . 89
SPI characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 90
USB startup time. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 92
USB DC electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 93
USB: full speed electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 93
ADC clock frequency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 94
ADC characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 94
ADC accuracy . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 96
Maximum source impedance RAIN max . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 98
DAC characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100
Temperature sensor calibration values. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 102
Temperature sensor characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 102
Comparator 1 characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 103
Comparator 2 characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 104
LCD controller characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 105
LQPF100 14 x 14 mm, 100-pin low-profile quad flat package
mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 108
LQFP64 10 x 10 mm 64-pin low-profile quad flat package mechanical data . . . . . . . . . . 111
LQFP48 7 x 7 mm, 48-pin low-profile quad flat package mechanical data. . . . . . . . . . . . 114
UFQFPN48 7 x 7 mm, 0.5 mm pitch, ultra thin fine-pitch quad flat no-lead
package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 117
UFBGA100 7 x 7 x 0.6 mm 0.5 mm pitch, ultra thin fine-pitch ball grid array
package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 119
TFBGA64 5.0x5.0x1.2 mm, 0.5 mm pitch thin fine-pitch ball grid array
package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 120
Thermal characteristics. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 123
Ordering information scheme . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 125
Document revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 126
DocID17659 Rev 11
STM32L151x6/8/B, STM32L152x6/8/B
List of figures
List of figures
Figure 1.
Figure 2.
Figure 3.
Figure 4.
Figure 5.
Figure 6.
Figure 7.
Figure 8.
Figure 9.
Figure 10.
Figure 11.
Figure 12.
Figure 13.
Figure 14.
Figure 15.
Figure 16.
Figure 17.
Figure 18.
Figure 19.
Figure 20.
Figure 21.
Figure 22.
Figure 23.
Figure 24.
Figure 25.
Figure 26.
Figure 27.
Figure 28.
Figure 29.
Figure 30.
Figure 31.
Figure 32.
Figure 33.
Figure 34.
Figure 35.
Figure 36.
Figure 37.
Figure 38.
Figure 39.
Figure 40.
Figure 41.
Figure 42.
Figure 43.
Figure 44.
Figure 45.
Ultra-low-power STM32L151x6/8/B and STM32L152x6/8/B block diagram. . . . . . . . . . . . 13
Clock tree . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
STM32L15xVx UFBGA100 ballout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
STM32L15xVx LQFP100 pinout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
STM32L15xRx TFBGA64 ballout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
STM32L15xRx LQFP64 pinout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
STM32L15xCx LQFP48 pinout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
STM32L15xCx UFQFPN48 pinout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
Memory map . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
Pin loading conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
Pin input voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
Power supply scheme. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
Optional LCD power supply scheme . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
Current consumption measurement scheme . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
High-speed external clock source AC timing diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70
Low-speed external clock source AC timing diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71
HSE oscillator circuit diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73
Typical application with a 32.768 kHz crystal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74
I/O AC characteristics definition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 86
Recommended NRST pin protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 87
I2C bus AC waveforms and measurement circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 89
SPI timing diagram - slave mode and CPHA = 0 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 91
SPI timing diagram - slave mode and CPHA = 1(1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 91
SPI timing diagram - master mode(1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 92
USB timings: definition of data signal rise and fall time . . . . . . . . . . . . . . . . . . . . . . . . . . . 93
ADC accuracy characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 97
Typical connection diagram using the ADC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 97
Maximum dynamic current consumption on VREF+ supply pin during ADC
conversion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 98
Power supply and reference decoupling (VREF+ not connected to VDDA). . . . . . . . . . . . . . 99
Power supply and reference decoupling (VREF+ connected to VDDA). . . . . . . . . . . . . . . . . 99
12-bit buffered /non-buffered DAC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 102
LQFP100 14 x 14 mm, 100-pin low-profile quad flat package outline . . . . . . . . . . . . . . . 107
LQFP100 recommended footprint . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 109
LQFP100 marking example (package top view) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 109
LQFP64 10 x 10 mm, 64-pin low-profile quad flat package outline . . . . . . . . . . . . . . . . . 110
LQFP64 recommended footprint . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 111
LQFP64 marking example (package top view) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 112
LQFP48 7 x 7 mm, 48-pin low-profile quad flat package outline . . . . . . . . . . . . . . . . . . . 113
LQFP48 recommended footprint . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 114
LQFP48 marking example (package top view) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 115
UFQFPN48 7 x 7 mm 0.5 mm pitch, ultra thin fine-pitch quad flat no-lead
package outline. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 116
UFQFPN48 recommended footprint . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 117
UFQFPN48 marking example (package top view) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 118
UFBGA100 7 x 7 x 0.6 mm 0.5 mm pitch, ultra thin fine-pitch ball grid array
package outline. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 118
UFBGA100 marking example (package top view) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 119
DocID17659 Rev 11
7/132
8
List of figures
Figure 46.
Figure 47.
Figure 48.
Figure 49.
8/132
STM32L151x6/8/B, STM32L152x6/8/B
TFBGA64 - 5.0x5.0x1.2 mm, 0.5 mm pitch, thin fine-pitch ball grid array
package outline. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 120
TFBGA64 marking example (package top view) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 121
Recommended PCB design rules for pads (0.5 mm pitch BGA) . . . . . . . . . . . . . . . . . . . 122
Thermal resistance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 124
DocID17659 Rev 11
STM32L151x6/8/B, STM32L152x6/8/B
1
Introduction
Introduction
This datasheet provides the ordering information and mechanical device characteristics of
the STM32L151x6/8/B and STM32L152x6/8/B ultra-low-power ARM® Cortex®-M3 based
microcontrollers product line.
The ultra-low-power STM32L151x6/8/B and STM32L152x6/8/B family includes devices in 3
different package types: from 48 to 100 pins. Depending on the device chosen, different sets
of peripherals are included, the description below gives an overview of the complete range
of peripherals proposed in this family.
These features make the ultra-low-power STM32L151x6/8/B and STM32L152x6/8/B
microcontroller family suitable for a wide range of applications:
•
Medical and handheld equipment
•
Application control and user interface
•
PC peripherals, gaming, GPS and sport equipment
•
Alarm systems, Wired and wireless sensors, Video intercom
•
Utility metering
This STM32L151x6/8/B and STM32L152x6/8/B datasheet should be read in conjunction
with the STM32L1xxxx reference manual (RM0038).
The document "Getting started with STM32L1xxxx hardware development” AN3216 gives a
hardware implementation overview. Both documents are available from the
STMicroelectronics website www.st.com.
For information on the ARM® Cortex®-M3 core please refer to the Cortex®-M3 Technical
Reference Manual, available from the www.arm.com website.
Figure 1 shows the general block diagram of the device family.
Caution:
This datasheet does not apply to STM32L15xx6/8/B-A covered by a separate datasheet.
DocID17659 Rev 11
9/132
48
Description
2
STM32L151x6/8/B, STM32L152x6/8/B
Description
The ultra-low-power STM32L151x6/8/B and STM32L152x6/8/B devices incorporate the
connectivity power of the universal serial bus (USB) with the high-performance ARM®
Cortex®-M3 32-bit RISC core operating at 32 MHz frequency (33.3 DMIPS), a memory
protection unit (MPU), high-speed embedded memories (Flash memory up to 128 Kbytes
and RAM up to 16 Kbytes) and an extensive range of enhanced I/Os and peripherals
connected to two APB buses.
All devices offer a 12-bit ADC, 2 DACs and 2 ultra-low-power comparators, six generalpurpose 16-bit timers and two basic timers, which can be used as time bases.
Moreover, the STM32L151x6/8/B and STM32L152x6/8/B devices contain standard and
advanced communication interfaces: up to two I2Cs and SPIs, three USARTs and a USB.
The STM32L151x6/8/B and STM32L152x6/8/B devices offer up to 20 capacitive sensing
channels to simply add touch sensing functionality to any application.
They also include a real-time clock and a set of backup registers that remain powered in
Standby mode.
Finally, the integrated LCD controller (except STM32L151x6/8/B devices) has a built-in LCD
voltage generator that allows to drive up to 8 multiplexed LCDs with contrast independent of
the supply voltage.
The ultra-low-power STM32L151x6/8/B and STM32L152x6/8/B devices operate from a 1.8
to 3.6 V power supply (down to 1.65 V at power down) with BOR and from a 1.65 to 3.6 V
power supply without BOR option. It is available in the -40 to +85 °C temperature range,
extended to 105°C in low power dissipation state. A comprehensive set of power-saving
modes allows the design of low-power applications.
10/132
DocID17659 Rev 11
STM32L151x6/8/B, STM32L152x6/8/B
2.1
Description
Device overview
Table 2. Ultra-low-power STM32L151x6/8/B and STM32L152x6/8/B device features and
peripheral counts
Peripheral
Flash (Kbytes)
STM32L15xCx
32
64
128
STM32L15xRx
32
Data EEPROM (Kbytes)
RAM (Kbytes)
Timers
Communication
interfaces
10
16
10
10
Generalpurpose
6
Basic
2
SPI
2
I2C
2
USART
3
USB
1
12-bit synchronized ADC
Number of channels
Operating temperatures
16
10
16
83
1
14 channels
1
20 channels
1
24 channels
2
2
4x32
8x28
4x18
4x44
8x40
2
13
20
Max. CPU frequency
Operating voltage
128
51
Comparator
Capacitive sensing channels
64
37
12-bit DAC
Number of channels
LCD (STM32L152xx Only)
COM x SEG
128
4
10
GPIOs
Packages
64
STM32L15xVx
32 MHz
1.8 V to 3.6 V (down to 1.65 V at power-down) with BOR option
1.65 V to 3.6 V without BOR option
Ambient temperatures: –40 to +85 °C
Junction temperature: –40 to + 105 °C
LQFP48, UFQFPN48
DocID17659 Rev 11
LQFP64, BGA64
LQFP100, BGA100
11/132
48
Description
2.2
STM32L151x6/8/B, STM32L152x6/8/B
Ultra-low-power device continuum
The ultra-low-power STM32L151x6/8/B and STM32L152x6/8/B devices are fully pin-to-pin
and software compatible. Besides the full compatibility within the family, the devices are part
of STMicroelectronics microcontrollers ultra-low-power strategy which also includes
STM8L101xx and STM8L15xx devices. The STM8L and STM32L families allow a
continuum of performance, peripherals, system architecture and features.
They are all based on STMicroelectronics ultra-low leakage process.
Note:
The ultra-low-power STM32L and general-purpose STM32Fxxxx families are pin-to-pin
compatible. The STM8L15xxx devices are pin-to-pin compatible with the STM8L101xx
devices. Please refer to the STM32F and STM8L documentation for more information on
these devices.
2.2.1
Performance
All families incorporate highly energy-efficient cores with both Harvard architecture and
pipelined execution: advanced STM8 core for STM8L families and ARM® Cortex®-M3 core
for STM32L family. In addition specific care for the design architecture has been taken to
optimize the mA/DMIPS and mA/MHz ratios.
This allows the ultra-low-power performance to range from 5 up to 33.3 DMIPs.
2.2.2
Shared peripherals
STM8L15xxx and STM32L1xxxx share identical peripherals which ensure a very easy
migration from one family to another:
2.2.3
•
Analog peripherals: ADC, DAC and comparators
•
Digital peripherals: RTC and some communication interfaces
Common system strategy
To offer flexibility and optimize performance, the STM8L15xx and STM32L1xxxx families
use a common architecture:
2.2.4
•
Same power supply range from 1.65 V to 3.6 V, (1.65 V at power down only for
STM8L15xx devices)
•
Architecture optimized to reach ultra-low consumption both in low power modes and
Run mode
•
Fast startup strategy from low power modes
•
Flexible system clock
•
Ultrasafe reset: same reset strategy including power-on reset, power-down reset,
brownout reset and programmable voltage detector.
Features
ST ultra-low-power continuum also lies in feature compatibility:
12/132
•
More than 10 packages with pin count from 20 to 144 pins and size down to 3 x 3 mm
•
Memory density ranging from 4 to 384 Kbytes
DocID17659 Rev 11
STM32L151x6/8/B, STM32L152x6/8/B
Functional overview
Figure 1 shows the block diagrams.
Figure 1. Ultra-low-power STM32L151x6/8/B and STM32L152x6/8/B block diagram
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Functional overview
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48
Functional overview
3.1
STM32L151x6/8/B, STM32L152x6/8/B
Low power modes
The ultra-low-power STM32L151x6/8/B and STM32L152x6/8/B devices support dynamic
voltage scaling to optimize its power consumption in run mode. The voltage from the internal
low-drop regulator that supplies the logic can be adjusted according to the system’s
maximum operating frequency and the external voltage supply:
•
In Range 1 (VDD range limited to 1.71-3.6 V), the CPU runs at up to 32 MHz (refer to
Table 17 for consumption).
•
In Range 2 (full VDD range), the CPU runs at up to 16 MHz (refer to Table 17 for
consumption)
•
In Range 3 (full VDD range), the CPU runs at up to 4 MHz (generated only with the
multispeed internal RC oscillator clock source). Refer to Table 17 for consumption.
Seven low power modes are provided to achieve the best compromise between low power
consumption, short startup time and available wakeup sources:
•
Sleep mode
In Sleep mode, only the CPU is stopped. All peripherals continue to operate and can
wake up the CPU when an interrupt/event occurs.
Sleep mode power consumption: refer to Table 19.
•
Low power run mode
This mode is achieved with the multispeed internal (MSI) RC oscillator set to the
minimum clock (65 kHz), execution from SRAM or Flash memory, and internal
regulator in low power mode to minimize the regulator's operating current. In the Low
power run mode, the clock frequency and the number of enabled peripherals are both
limited.
Low power run mode consumption: refer to Table 20: Current consumption in Low
power run mode.
•
Low power sleep mode
This mode is achieved by entering the Sleep mode with the internal voltage regulator in
Low power mode to minimize the regulator’s operating current. In the Low power sleep
mode, both the clock frequency and the number of enabled peripherals are limited; a
typical example would be to have a timer running at 32 kHz.
When wakeup is triggered by an event or an interrupt, the system reverts to the run
mode with the regulator on.
Low power sleep mode consumption: refer to Table 21: Current consumption in Low
power sleep mode.
•
Stop mode with RTC
Stop mode achieves the lowest power consumption while retaining the RAM and
register contents and real time clock. All clocks in the VCORE domain are stopped, the
PLL, MSI RC, HSI RC and HSE crystal oscillators are disabled. The LSE or LSI is still
running. The voltage regulator is in the low power mode.
The device can be woken up from Stop mode by any of the EXTI line, in 8 µs. The EXTI
line source can be one of the 16 external lines. It can be the PVD output, the
Comparator 1 event or Comparator 2 event (if internal reference voltage is on), it can
be the RTC alarm(s), the USB wakeup, the RTC tamper events, the RTC timestamp
event or the RTC wakeup.
•
Stop mode without RTC
Stop mode achieves the lowest power consumption while retaining the RAM and
register contents. All clocks are stopped, the PLL, MSI RC, HSI and LSI RC, LSE and
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DocID17659 Rev 11
STM32L151x6/8/B, STM32L152x6/8/B
Functional overview
HSE crystal oscillators are disabled. The voltage regulator is in the low power mode.
The device can be woken up from Stop mode by any of the EXTI line, in 8 µs. The EXTI
line source can be one of the 16 external lines. It can be the PVD output, the
Comparator 1 event or Comparator 2 event (if internal reference voltage is on). It can
also be wakened by the USB wakeup.
Stop mode consumption: refer to Table 22: Typical and maximum current
consumptions in Stop mode.
•
Standby mode with RTC
Standby mode is used to achieve the lowest power consumption and real time clock.
The internal voltage regulator is switched off so that the entire VCORE domain is
powered off. The PLL, MSI RC, HSI RC and HSE crystal oscillators are also switched
off. The LSE or LSI is still running. After entering Standby mode, the RAM and register
contents are lost except for registers in the Standby circuitry (wakeup logic, IWDG,
RTC, LSI, LSE Crystal 32K osc, RCC_CSR).
The device exits Standby mode in 60 µs when an external reset (NRST pin), an IWDG
reset, a rising edge on one of the three WKUP pins, RTC alarm (Alarm A or Alarm B),
RTC tamper event, RTC timestamp event or RTC Wakeup event occurs.
•
Standby mode without RTC
Standby mode is used to achieve the lowest power consumption. The internal voltage
regulator is switched off so that the entire VCORE domain is powered off. The PLL, MSI,
RC, HSI and LSI RC, HSE and LSE crystal oscillators are also switched off. After
entering Standby mode, the RAM and register contents are lost except for registers in
the Standby circuitry (wakeup logic, IWDG, RTC, LSI, LSE Crystal 32K osc,
RCC_CSR).
The device exits Standby mode in 60 µs when an external reset (NRST pin) or a rising
edge on one of the three WKUP pin occurs.
Standby mode consumption: refer to Table 23.
Note:
The RTC, the IWDG, and the corresponding clock sources are not stopped by entering the
Stop or Standby mode.
Table 3. Functionalities depending on the operating power supply range
Functionalities depending on the operating power supply range
Operating power
supply range
DAC and ADC
operation
USB
Dynamic voltage
scaling range
I/O operation
VDD = 1.65 to 1.71 V
Not functional
Not functional
Range 2 or
Range 3
Degraded speed
performance
VDD = 1.71 to 1.8 V(1)
Not functional
Not functional
Range 1,
Range 2 or
Range 3
Degraded speed
performance
VDD = 1.8 to 2.0 V(1)
Conversion time
up to 500 Ksps
Not functional
Range 1,
Range 2 or
Range 3
Degraded speed
performance
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Functional overview
STM32L151x6/8/B, STM32L152x6/8/B
Table 3. Functionalities depending on the operating power supply range (continued)
Functionalities depending on the operating power supply range
Operating power
supply range
DAC and ADC
operation
USB
Dynamic voltage
scaling range
I/O operation
VDD = 2.0 to 2.4 V
Conversion time
up to 500 Ksps
Functional(2)
Range 1,
Range 2 or
Range 3
Full speed operation
VDD = 2.4 to 3.6 V
Conversion time
up to 1 Msps
Functional(2)
Range 1,
Range 2 or
Range 3
Full speed operation
1. The CPU frequency changes from initial to final must respect "FCPU initial < 4*FCPU final" to limit VCORE
drop due to current consumption peak when frequency increases. It must also respect 5 µs delay between
two changes. For example to switch from 4.2 MHz to 32 MHz, you can switch from 4.2 MHz to 16 MHz,
wait 5 µs, then switch from 16 MHz to 32 MHz.
2. Should be USB compliant from I/O voltage standpoint, the minimum VDD is 3.0 V.
Table 4. CPU frequency range depending on dynamic voltage scaling
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CPU frequency range
Dynamic voltage scaling range
16 MHz to 32 MHz (1ws)
32 kHz to 16 MHz (0ws)
Range 1
8 MHz to 16 MHz (1ws)
32 kHz to 8 MHz (0ws)
Range 2
2.1 MHz to 4.2 MHz (1ws)
32 kHz to 2.1 MHz (0ws)
Range 3
DocID17659 Rev 11
STM32L151x6/8/B, STM32L152x6/8/B
Functional overview
Table 5. Working mode-dependent functionalities (from Run/active down to standby)
Standby
Run/Active
Sleep
CPU
Y
-
Y
-
-
-
-
-
Flash
Y
Y
Y
Y
-
-
-
-
RAM
Y
Y
Y
Y
Y
-
-
-
Backup Registers
Y
Y
Y
Y
Y
-
Y
-
EEPROM
Y
-
Y
Y
Y
-
-
-
Brown-out rest
(BOR)
Y
Y
Y
Y
Y
Y
Y
-
DMA
Y
Y
Y
Y
-
-
-
-
Programmable
Voltage Detector
(PVD)
Y
Y
Y
Y
Y
Y
Y
-
Power On Reset
(POR)
Y
Y
Y
Y
Y
Y
Y
-
Power Down Rest
(PDR)
Y
Y
Y
Y
Y
-
Y
-
High Speed
Internal (HSI)
Y
Y
-
-
-
-
-
-
High Speed
External (HSE)
Y
Y
-
-
-
-
-
-
Low Speed Internal
(LSI)
Y
Y
Y
Y
Y
-
-
-
Low Speed
External (LSE)
Y
Y
Y
Y
Y
-
-
-
Multi-Speed
Internal (MSI)
Y
Y
Y
Y
-
-
-
-
Inter-Connect
Controller
Y
Y
Y
Y
-
-
-
-
RTC
Y
Y
Y
Y
Y
Y
Y
-
RTC Tamper
Y
Y
Y
Y
Y
Y
Y
Y
Auto Wakeup
(AWU)
Y
Y
Y
Y
Y
Y
Y
Y
LCD
Y
Y
Y
Y
Y
-
-
-
USB
Y
Y
-
-
-
Y
-
-
-
-
Ips
Lowpower
Sleep
Stop
Lowpower
Run
Wakeup
capability
Wakeup
capability
USART
Y
Y
Y
Y
Y
(1)
SPI
Y
Y
Y
Y
-
-
-
-
I2C
Y
Y
Y
Y
-
(1)
-
-
ADC
Y
Y
-
-
-
-
-
-
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Functional overview
STM32L151x6/8/B, STM32L152x6/8/B
Table 5. Working mode-dependent functionalities (from Run/active down to standby) (continued)
Standby
Run/Active
Sleep
DAC
Y
Y
Y
Y
Y
-
-
-
Temperature
sensor
Y
Y
Y
Y
Y
-
-
-
Comparators
Y
Y
Y
Y
Y
Y
-
-
16-bit and 32-bit
Timers
Y
Y
Y
Y
-
-
-
-
IWDG
Y
Y
Y
Y
Y
Y
Y
Y
WWDG
Y
Y
Y
Y
-
-
-
-
Touch sensing
Y
-
-
-
-
-
-
-
Systick Timer
Y
Y
Y
Y
-
-
-
-
GPIOs
Y
Y
Y
Y
Y
Y
-
3 Pins
0 µs
0.36 µs
3 µs
32 µs
Ips
Wakeup time to
Run mode
Lowpower
Sleep
Stop
Lowpower
Run
Wakeup
capability
< 8 µs
Wakeup
capability
50 µs
0.3 µA (No RTC)
0.5 µA (No
VDD=1.8V
RTC) VDD=1.8V
Consumption
VDD=1.8V to 3.6V
(Typ)
Down to
214 µA/MHz
(from Flash)
Down to
50 µA/MHz
(from Flash)
Down to
9 µA
Down to
4.4 µA
1.4 µA (with
RTC) VDD=1.8V
1 µA (with RTC)
VDD=1.8V
0.5 µA (No
0.3 µA (No RTC)
RTC) VDD=3.0V
VDD=3.0V
1.6 µA (with
RTC) VDD=3.0V
1.3 µA (with
RTC) VDD=3.0V
1. The startup on communication line wakes the CPU which was made possible by an EXTI, this induces a delay before
entering run mode.
3.2
ARM® Cortex®-M3 core with MPU
The ARM® Cortex®-M3 processor is the industry leading processor for embedded systems.
It has been developed to provide a low-cost platform that meets the needs of MCU
implementation, with a reduced pin count and low-power consumption, while delivering
outstanding computational performance and an advanced system response to interrupts.
The ARM® Cortex®-M3 32-bit RISC processor features exceptional code-efficiency,
delivering the high-performance expected from an ARM core in the memory size usually
associated with 8- and 16-bit devices.
The memory protection unit (MPU) improves system reliability by defining the memory
attributes (such as read/write access permissions) for different memory regions. It provides
up to eight different regions and an optional predefined background region.
Owing to its embedded ARM core, the STM32L151x6/8/B and STM32L152x6/8/B devices
are compatible with all ARM tools and software.
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STM32L151x6/8/B, STM32L152x6/8/B
Functional overview
Nested vectored interrupt controller (NVIC)
The ultra-low-power STM32L151x6/8/B and STM32L152x6/8/B devices embed a nested
vectored interrupt controller able to handle up to 45 maskable interrupt channels (not
including the 16 interrupt lines of Cortex®-M3) and 16 priority levels.
•
Closely coupled NVIC gives low-latency interrupt processing
•
Interrupt entry vector table address passed directly to the core
•
Closely coupled NVIC core interface
•
Allows early processing of interrupts
•
Processing of late arriving, higher-priority interrupts
•
Support for tail-chaining
•
Processor state automatically saved
•
Interrupt entry restored on interrupt exit with no instruction overhead
This hardware block provides flexible interrupt management features with minimal interrupt
latency.
3.3
Reset and supply management
3.3.1
Power supply schemes
3.3.2
•
VDD = 1.65 to 3.6 V: external power supply for I/Os and the internal regulator.
Provided externally through VDD pins.
•
VSSA, VDDA = 1.65 to 3.6 V: external analog power supplies for ADC, reset blocks, RCs
and PLL (minimum voltage to be applied to VDDA is 1.8 V when the ADC is used).
VDDA and VSSA must be connected to VDD and VSS, respectively.
Power supply supervisor
The device has an integrated ZEROPOWER power-on reset (POR)/power-down reset
(PDR) that can be coupled with a brownout reset (BOR) circuitry.
The device exists in two versions:
•
The version with BOR activated at power-on operates between 1.8 V and 3.6 V.
•
The other version without BOR operates between 1.65 V and 3.6 V.
After the VDD threshold is reached (1.65 V or 1.8 V depending on the BOR which is active or
not at power-on), the option byte loading process starts, either to confirm or modify default
thresholds, or to disable the BOR permanently: in this case, the VDD min value becomes
1.65 V (whatever the version, BOR active or not, at power-on).
When BOR is active at power-on, it ensures proper operation starting from 1.8 V whatever
the power ramp-up phase before it reaches 1.8 V. When BOR is not active at power-up, the
power ramp-up should guarantee that 1.65 V is reached on VDD at least 1 ms after it exits
the POR area.
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48
Functional overview
STM32L151x6/8/B, STM32L152x6/8/B
Five BOR thresholds are available through option bytes, starting from 1.8 V to 3 V. To
reduce the power consumption in Stop mode, it is possible to automatically switch off the
internal reference voltage (VREFINT) in Stop mode. The device remains in reset mode when
VDD is below a specified threshold, VPOR/PDR or VBOR, without the need for any external
reset circuit.
Note:
The start-up time at power-on is typically 3.3 ms when BOR is active at power-up, the startup time at power-on can be decreased down to 1 ms typically for devices with BOR inactive
at power-up.
The device features an embedded programmable voltage detector (PVD) that monitors the
VDD/VDDA power supply and compares it to the VPVD threshold. This PVD offers 7 different
levels between 1.85 V and 3.05 V, chosen by software, with a step around 200 mV. An
interrupt can be generated when VDD/VDDA drops below the VPVD threshold and/or when
VDD/VDDA is higher than the VPVD threshold. The interrupt service routine can then generate
a warning message and/or put the MCU into a safe state. The PVD is enabled by software.
3.3.3
Voltage regulator
The regulator has three operation modes: main (MR), low power (LPR) and power down.
3.3.4
•
MR is used in Run mode (nominal regulation)
•
LPR is used in the Low-power run, Low-power sleep and Stop modes
•
Power down is used in Standby mode. The regulator output is high impedance, the
kernel circuitry is powered down, inducing zero consumption but the contents of the
registers and RAM are lost are lost except for the standby circuitry (wakeup logic,
IWDG, RTC, LSI, LSE crystal 32K osc, RCC_CSR).
Boot modes
At startup, boot pins are used to select one of three boot options:
•
Boot from Flash memory
•
Boot from System Memory
•
Boot from embedded RAM
The boot loader is located in System Memory. It is used to reprogram the Flash memory by
using USART1 or USART2. See STM32™ microcontroller system memory boot mode
AN2606 for details.
20/132
DocID17659 Rev 11
STM32L151x6/8/B, STM32L152x6/8/B
3.4
Functional overview
Clock management
The clock controller distributes the clocks coming from different oscillators to the core and
the peripherals. It also manages clock gating for low power modes and ensures clock
robustness. It features:
•
Clock prescaler: to get the best trade-off between speed and current consumption, the
clock frequency to the CPU and peripherals can be adjusted by a programmable
prescaler
•
Safe clock switching: clock sources can be changed safely on the fly in run mode
through a configuration register.
•
Clock management: to reduce power consumption, the clock controller can stop the
clock to the core, individual peripherals or memory.
•
Master clock source: three different clock sources can be used to drive the master
clock:
•
–
1-24 MHz high-speed external crystal (HSE), that can supply a PLL
–
16 MHz high-speed internal RC oscillator (HSI), trimmable by software, that can
supply a PLL
–
Multispeed internal RC oscillator (MSI), trimmable by software, able to generate 7
frequencies (65.5 kHz, 131 kHz, 262 kHz, 524 kHz, 1.05 MHz, 2.1 MHz, 4.2 MHz)
with a consumption proportional to speed, down to 750 nA typical. When a
32.768 kHz clock source is available in the system (LSE), the MSI frequency can
be trimmed by software down to a ±0.5% accuracy.
Auxiliary clock source: two ultra-low-power clock sources that can be used to drive
the LCD controller and the real-time clock:
–
32.768 kHz low-speed external crystal (LSE)
–
37 kHz low-speed internal RC (LSI), also used to drive the independent watchdog.
The LSI clock can be measured using the high-speed internal RC oscillator for
greater precision.
•
RTC and LCD clock sources: the LSI, LSE or HSE sources can be chosen to clock
the RTC and the LCD, whatever the system clock.
•
USB clock source: the embedded PLL has a dedicated 48 MHz clock output to supply
the USB interface.
•
Startup clock: after reset, the microcontroller restarts by default with an internal
2.1 MHz clock (MSI). The prescaler ratio and clock source can be changed by the
application program as soon as the code execution starts.
•
Clock security system (CSS): this feature can be enabled by software. If a HSE clock
failure occurs, the master clock is automatically switched to HSI and a software
interrupt is generated if enabled.
•
Clock-out capability (MCO: microcontroller clock output): it outputs one of the
internal clocks for external use by the application.
Several prescalers allow the configuration of the AHB frequency, the high-speed APB
(APB2) and the low-speed APB (APB1) domains. The maximum frequency of the AHB and
the APB domains is 32 MHz. See Figure 2 for details on the clock tree.
DocID17659 Rev 11
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48
Functional overview
STM32L151x6/8/B, STM32L152x6/8/B
Figure 2. Clock tree
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1. For the USB function to be available, both HSE and PLL must be enabled, with the CPU running at either
24 MHz or 32 MHz.
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DocID17659 Rev 11
STM32L151x6/8/B, STM32L152x6/8/B
3.5
Functional overview
Low power real-time clock and backup registers
The real-time clock (RTC) is an independent BCD timer/counter. Dedicated registers contain
the second, minute, hour (12/24 hour), week day, date, month, year, in BCD (binary-coded
decimal) format. Correction for 28, 29 (leap year), 30, and 31 day of the month are made
automatically. The RTC provides a programmable alarm and programmable periodic
interrupts with wakeup from Stop and Standby modes.
•
The programmable wakeup time ranges from 120 µs to 36 hours
•
Stop mode consumption with LSI and Auto-wakeup: 1.2 µA (at 1.8 V) and 1.4 µA (at
3.0 V)
•
Stop mode consumption with LSE, calendar and Auto-wakeup: 1.3 µA (at 1.8V), 1.6 µA
(at 3.0 V)
The RTC can be calibrated with an external 512 Hz output, and a digital compensation
circuit helps reduce drift due to crystal deviation.
There are twenty 32-bit backup registers provided to store 80 bytes of user application data.
They are cleared in case of tamper detection.
3.6
GPIOs (general-purpose inputs/outputs)
Each of the GPIO pins can be configured by software as output (push-pull or open-drain), as
input (with or without pull-up or pull-down) or as peripheral alternate function. Most of the
GPIO pins are shared with digital or analog alternate functions, and can be individually
remapped using dedicated AFIO registers. All GPIOs are high current capable. The
alternate function configuration of I/Os can be locked if needed following a specific
sequence in order to avoid spurious writing to the I/O registers. The I/O controller is
connected to the AHB with a toggling speed of up to 16 MHz.
External interrupt/event controller (EXTI)
The external interrupt/event controller consists of 23 edge detector lines used to generate
interrupt/event requests. Each line can be individually configured to select the trigger event
(rising edge, falling edge, both) and can be masked independently. A pending register
maintains the status of the interrupt requests. The EXTI can detect an external line with a
pulse width shorter than the Internal APB2 clock period. Up to 83 GPIOs can be connected
to the 16 external interrupt lines. The 7 other lines are connected to RTC, PVD, USB or
Comparator events.
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48
Functional overview
3.7
STM32L151x6/8/B, STM32L152x6/8/B
Memories
The STM32L151x6/8/B and STM32L152x6/8/B devices have the following features:
•
Up to 16 Kbyte of embedded RAM accessed (read/write) at CPU clock speed with 0
wait states. With the enhanced bus matrix, operating the RAM does not lead to any
performance penalty during accesses to the system bus (AHB and APB buses).
•
The non-volatile memory is divided into three arrays:
–
32, 64 or 128 Kbyte of embedded Flash program memory
–
4 Kbyte of data EEPROM
–
Options bytes
The options bytes are used to write-protect the memory (with 4 KB granularity) and/or
readout-protect the whole memory with the following options:
–
Level 0: no readout protection
–
Level 1: memory readout protection, the Flash memory cannot be read from or
written to if either debug features are connected or boot in RAM is selected
–
Level 2: chip readout protection, debug features (Cortex®-M3 JTAG and serial
wire) and boot in RAM selection disabled (JTAG fuse)
The whole non-volatile memory embeds the error correction code (ECC) feature.
3.8
DMA (direct memory access)
The flexible 7-channel, general-purpose DMA is able to manage memory-to-memory,
peripheral-to-memory and memory-to-peripheral transfers. The DMA controller supports
circular buffer management, avoiding the generation of interrupts when the controller
reaches the end of the buffer.
Each channel is connected to dedicated hardware DMA requests, with software trigger
support for each channel. Configuration is done by software and transfer sizes between
source and destination are independent.
The DMA can be used with the main peripherals: SPI, I2C, USART, general-purpose timers
and ADC.
3.9
LCD (liquid crystal display)
The LCD drives up to 8 common terminals and 44 segment terminals to drive up to 320
pixels.
24/132
•
Internal step-up converter to guarantee functionality and contrast control irrespective of
VDD. This converter can be deactivated, in which case the VLCD pin is used to provide
the voltage to the LCD
•
Supports static, 1/2, 1/3, 1/4 and 1/8 duty
•
Supports static, 1/2, 1/3 and 1/4 bias
•
Phase inversion to reduce power consumption and EMI
•
Up to 8 pixels can be programmed to blink
•
Unneeded segments and common pins can be used as general I/O pins
•
LCD RAM can be updated at any time owing to a double-buffer
•
The LCD controller can operate in Stop mode
DocID17659 Rev 11
STM32L151x6/8/B, STM32L152x6/8/B
3.10
Functional overview
ADC (analog-to-digital converter)
A 12-bit analog-to-digital converters is embedded into STM32L151x6/8/B and
STM32L152x6/8/B devices with up to 24 external channels, performing conversions in
single-shot or scan mode. In scan mode, automatic conversion is performed on a selected
group of analog inputs.
The ADC can be served by the DMA controller.
An analog watchdog feature allows very precise monitoring of the converted voltage of one,
some or all selected channels. An interrupt is generated when the converted voltage is
outside the programmed thresholds.
The events generated by the general-purpose timers (TIMx) can be internally connected to
the ADC start trigger and injection trigger, to allow the application to synchronize A/D
conversions and timers. An injection mode allows high priority conversions to be done by
interrupting a scan mode which runs in as a background task.
The ADC includes a specific low power mode. The converter is able to operate at maximum
speed even if the CPU is operating at a very low frequency and has an auto-shutdown
function. The ADC’s runtime and analog front-end current consumption are thus minimized
whatever the MCU operating mode.
3.10.1
Temperature sensor
The temperature sensor (TS) generates a voltage VSENSE that varies linearly with
temperature.
The temperature sensor is internally connected to the ADC_IN16 input channel which is
used to convert the sensor output voltage into a digital value.
The sensor provides good linearity but it has to be calibrated to obtain good overall
accuracy of the temperature measurement. As the offset of the temperature sensor varies
from chip to chip due to process variation, the uncalibrated internal temperature sensor is
suitable for applications that detect temperature changes only.
To improve the accuracy of the temperature sensor measurement, each device is
individually factory-calibrated by ST. The temperature sensor factory calibration data are
stored by ST in the system memory area, accessible in read-only mode, see Table 58:
Temperature sensor calibration values.
3.10.2
Internal voltage reference (VREFINT)
The internal voltage reference (VREFINT) provides a stable (bandgap) voltage output for the
ADC and Comparators. VREFINT is internally connected to the ADC_IN17 input channel. It
enables accurate monitoring of the VDD value (when no external voltage, VREF+, is
available for ADC). The precise voltage of VREFINT is individually measured for each part by
ST during production test and stored in the system memory area. It is accessible in readonly mode see Table 16: Embedded internal reference voltage.
3.11
DAC (digital-to-analog converter)
The two 12-bit buffered DAC channels can be used to convert two digital signals into two
analog voltage signal outputs. The chosen design structure is composed of integrated
resistor strings and an amplifier in non-inverting configuration.
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48
Functional overview
STM32L151x6/8/B, STM32L152x6/8/B
This dual digital Interface supports the following features:
•
two DAC converters: one for each output channel
•
left or right data alignment in 12-bit mode
•
synchronized update capability
•
noise-wave generation
•
triangular-wave generation
•
dual DAC channels’ independent or simultaneous conversions
•
DMA capability for each channel (including the underrun interrupt)
•
external triggers for conversion
•
input reference voltage VREF+
Eight DAC trigger inputs are used in the STM32L151x6/8/B and STM32L152x6/8/B devices.
The DAC channels are triggered through the timer update outputs that are also connected
to different DMA channels.
3.12
Ultra-low-power comparators and reference voltage
The STM32L151x6/8/B and STM32L152x6/8/B devices embed two comparators sharing
the same current bias and reference voltage. The reference voltage can be internal or
external (coming from an I/O).
•
one comparator with fixed threshold
•
one comparator with rail-to-rail inputs, fast or slow mode. The threshold can be one of
the following:
–
DAC output
–
External I/O
–
Internal reference voltage (VREFINT) or VREFINT submultiple (1/4, 1/2, 3/4)
Both comparators can wake up from Stop mode, and be combined into a window
comparator.
The internal reference voltage is available externally via a low power / low current output
buffer (driving current capability of 1 µA typical).
3.13
Routing interface
This interface controls the internal routing of I/Os to TIM2, TIM3, TIM4 and to the
comparator and reference voltage output.
3.14
Touch sensing
The STM32L151x6/8/B and STM32L152x6/8/B devices provide a simple solution for adding
capacitive sensing functionality to any application. These devices offer up to 20 capacitive
sensing channels distributed over 10 analog I/O groups. Only software capacitive sensing
acquisition mode is supported.
Capacitive sensing technology is able to detect the presence of a finger near a sensor which
is protected from direct touch by a dielectric (glass, plastic, ...). The capacitive variation
introduced by the finger (or any conductive object) is measured using a proven
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STM32L151x6/8/B, STM32L152x6/8/B
Functional overview
implementation based on a surface charge transfer acquisition principle. It consists of
charging the sensor capacitance and then transferring a part of the accumulated charges
into a sampling capacitor until the voltage across this capacitor has reached a specific
threshold. The capacitive sensing acquisition only requires few external components to
operate.
Reliable touch sensing functionality can be quickly and easily implemented using the free
STM32L1xx STMTouch touch sensing firmware library.
3.15
Timers and watchdogs
The ultra-low-power STM32L151x6/8/B and STM32L152x6/8/B devices include six generalpurpose timers, two basic timers and two watchdog timers.
Table 6 compares the features of the general-purpose and basic timers.
Table 6. Timer feature comparison
Timer
Counter
resolution
Counter
type
Prescaler
factor
DMA request Capture/compare Complementary
generation
channels
outputs
TIM2,
TIM3,
TIM4
16-bit
Up,
down,
up/down
Any integer
between 1
and 65536
Yes
4
No
TIM9
16-bit
Up
Any integer
between 1
and 65536
No
2
No
TIM10,
TIM11
16-bit
Up
Any integer
between 1
and 65536
No
1
No
TIM6,
TIM7
16-bit
Up
Any integer
between 1
and 65536
Yes
0
No
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48
Functional overview
3.15.1
STM32L151x6/8/B, STM32L152x6/8/B
General-purpose timers (TIM2, TIM3, TIM4, TIM9, TIM10 and TIM11)
There are six synchronizable general-purpose timers embedded in the STM32L151x6/8/B
and STM32L152x6/8/B devices (see Table 6 for differences).
TIM2, TIM3, TIM4
These timers are based on a 16-bit auto-reload up/down-counter and a 16-bit prescaler.
They feature 4 independent channels each for input capture/output compare, PWM or onepulse mode output. This gives up to 12 input captures/output compares/PWMs on the
largest packages.
The TIM2, TIM3, TIM4 general-purpose timers can work together or with the TIM10, TIM11
and TIM9 general-purpose timers via the Timer Link feature for synchronization or event
chaining. Their counter can be frozen in debug mode. Any of the general-purpose timers
can be used to generate PWM outputs.
TIM2, TIM3, TIM4 all have independent DMA request generation.
These timers are capable of handling quadrature (incremental) encoder signals and the
digital outputs from 1 to 3 hall-effect sensors.
TIM10, TIM11 and TIM9
These timers are based on a 16-bit auto-reload up-counter and a 16-bit prescaler. They
include a 16-bit prescaler. TIM10 and TIM11 feature one independent channel, whereas
TIM9 has two independent channels for input capture/output compare, PWM or one-pulse
mode output. They can be synchronized with the TIM2, TIM3, TIM4 full-featured generalpurpose timers.
They can also be used as simple time bases and be clocked by the LSE clock source
(32.768 kHz) to provide time bases independent from the main CPU clock.
3.15.2
Basic timers (TIM6 and TIM7)
These timers are mainly used for DAC trigger generation. They can also be used as generic
16-bit time bases.
3.15.3
SysTick timer
This timer is dedicated to the OS, but could also be used as a standard downcounter. It is
based on a 24-bit down-counter with autoreload capability and a programmable clock
source. It features a maskable system interrupt generation when the counter reaches 0.
3.15.4
Independent watchdog (IWDG)
The independent watchdog is based on a 12-bit down-counter and 8-bit prescaler. It is
clocked from an independent 37 kHz internal RC and, as it operates independently of the
main clock, it can operate in Stop and Standby modes. It can be used either as a watchdog
to reset the device when a problem occurs, or as a free-running timer for application timeout
management. It is hardware- or software-configurable through the option bytes. The counter
can be frozen in debug mode.
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3.15.5
Functional overview
Window watchdog (WWDG)
The window watchdog is based on a 7-bit down-counter that can be set as free-running. It
can be used as a watchdog to reset the device when a problem occurs. It is clocked from
the main clock. It has an early warning interrupt capability and the counter can be frozen in
debug mode.
3.16
Communication interfaces
3.16.1
I²C bus
Up to two I²C bus interfaces can operate in multimaster and slave modes. They can support
standard and fast modes.
They support dual slave addressing (7-bit only) and both 7- and 10-bit addressing in master
mode. A hardware CRC generation/verification is embedded.
They can be served by DMA and they support SM Bus 2.0/PM Bus.
3.16.2
Universal synchronous/asynchronous receiver transmitter (USART)
All USART interfaces are able to communicate at speeds of up to 4 Mbit/s. They provide
hardware management of the CTS and RTS signals and are ISO 7816 compliant. They
support IrDA SIR ENDEC and have LIN Master/Slave capability.
All USART interfaces can be served by the DMA controller.
3.16.3
Serial peripheral interface (SPI)
Up to two SPIs are able to communicate at up to 16 Mbits/s in slave and master modes in
full-duplex and half-duplex communication modes. The 3-bit prescaler gives 8 master mode
frequencies and the frame is configurable to 8 bits or 16 bits. The hardware CRC
generation/verification supports basic SD Card/MMC modes.
Both SPIs can be served by the DMA controller.
3.16.4
Universal serial bus (USB)
The STM32L151x6/8/B and STM32L152x6/8/B devices embed a USB device peripheral
compatible with the USB full speed 12 Mbit/s. The USB interface implements a full speed
(12 Mbit/s) function interface. It has software-configurable endpoint setting and supports
suspend/resume. The dedicated 48 MHz clock is generated from the internal main PLL (the
clock source must use a HSE crystal oscillator).
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48
Functional overview
3.17
STM32L151x6/8/B, STM32L152x6/8/B
CRC (cyclic redundancy check) calculation unit
The CRC (cyclic redundancy check) calculation unit is used to get a CRC code from a 32-bit
data word and a fixed generator polynomial.
Among other applications, CRC-based techniques are used to verify data transmission or
storage integrity. In the scope of the EN/IEC 60335-1 standard, they offer a means of
verifying the Flash memory integrity. The CRC calculation unit helps compute a signature of
the software during runtime, to be compared with a reference signature generated at linktime and stored at a given memory location.
3.18
Development support
Serial wire JTAG debug port (SWJ-DP)
The ARM SWJ-DP interface is embedded, and is a combined JTAG and serial wire debug
port that enables either a serial wire debug or a JTAG probe to be connected to the target.
The JTAG JTMS and JTCK pins are shared with SWDAT and SWCLK, respectively, and a
specific sequence on the JTMS pin is used to switch between JTAG-DP and SW-DP.
The JTAG port can be permanently disabled with a JTAG fuse.
Embedded Trace Macrocell™
The ARM Embedded Trace Macrocell provides a greater visibility of the instruction and data
flow inside the CPU core by streaming compressed data at a very high rate from the
STM32L151x6/8/B and STM32L152x6/8/B device through a small number of ETM pins to
an external hardware trace port analyzer (TPA) device. The TPA is connected to a host
computer using USB, Ethernet, or any other high-speed channel. Real-time instruction and
data flow activity can be recorded and then formatted for display on the host computer
running debugger software. TPA hardware is commercially available from common
development tool vendors. It operates with third party debugger software tools.
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STM32L151x6/8/B, STM32L152x6/8/B
4
Pin descriptions
Pin descriptions
Figure 3. STM32L15xVx UFBGA100 ballout
$
3(
3(
3%
%227
3'
3'
3%
3%
3$
3$
3$
3$
%
3(
3(
3%
3%
3%
3'
3'
3'
3'
3&
3&
3$
&
3&
:.83
3(
3(
3'
3'
3&
3+
3$
966B
3$
3$
3&
966B
3&
3&
3&
966B
966B
9''B
9''B
'
(
3(
3&
26&B,1 :8.3
3&
9/&'
26&B287
9''B
3%
)
3+
26&B,1
*
3+
9''B
26&B287
+
3&
1567
9''B
3'
3'
3'
-
966$
3&
3&
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3'
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.
95()
3&
3$
3$
3&
/
95()
3$
:.83
3$
3$
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3%
0
9''$
3$
3$
3$
3%
3%
966B
3'
3'
3%
3%
3%
3(
3(
3(
3%
3%
3%
3(
3(
3(
3(
3(
3(
AIF
1. This figure shows the package top view.
DocID17659 Rev 11
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48
Pin descriptions
STM32L151x6/8/B, STM32L152x6/8/B
6$$?
633?
0%
0%
0"
0"
"//4
0"
0"
0"
0"
0"
0$
0$
0$
0$
0$
0$
0$
0$
0#
0#
0#
0!
0!
Figure 4. STM32L15xVx LQFP100 pinout
,1&0
6$$?
633?
0(
0! 0!
0!
0!
0!
0!
0#
0#
0#
0#
0$
0$
0$
0$
0$
0$
0$
0$
0"
0"
0"
0"
0!
633?
6$$?
0!
0!
0!
0!
0#
0#
0"
0"
0"
0%
0%
0%
0%
0%
0%
0%
0%
0%
0"
0"
633?
6$$?
0%
0%
0%
0%
0%7+50
6,#$
0#7+50
0#/3#?).
0#/3#?/54
633?
6$$?
0(/3#?).
0(/3#?/54
.234
0#
0#
0#
0#
633!
62%&
62%&
6$$!
0!7+50
0!
0!
1. This figure shows the package top view.
32/132
DocID17659 Rev 11
AIC
STM32L151x6/8/B, STM32L152x6/8/B
Pin descriptions
Figure 5. STM32L15xRx TFBGA64 ballout
1
2
3
4
5
6
7
8
A
PC14OSC32_IN
PC13WKUP2
PB9
PB4
PB3
PA15
PA14
PA13
B
PC15OSC32_OUT
VLCD
PB8
BOOT0
PD2
PC11
PC10
PA12
C
PH0OSC_IN
VSS_4
PB7
PB5
PC12
PA10
PA9
PA11
D
PH1OSC_OUT
VDD_4
PB6
VSS_3
VSS_2
VSS_1
PA8
PC9
E
NRST
PC1
PC0
VDD_3
VDD_2
VDD_1
PC7
PC8
F
VSSA
PC2
PA2
PA5
PB0
PC6
PB15
PB14
G
VREF+
PA0-WKUP1
PA3
PA6
PB1
PB2
PB10
PB13
H
VDDA
PA1
PA4
PA7
PC4
PC5
PB11
PB12
AI16090c
1. This figure shows the package top view.
DocID17659 Rev 11
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48
Pin descriptions
STM32L151x6/8/B, STM32L152x6/8/B
3$
3$
3&
3&
3&
3'
3%
3%
3%
3%
3%
%227
3%
3%
966B
9''B
Figure 6. STM32L15xRx LQFP64 pinout
9''B
3&:.83
966B
3&26&B,1
3$
3&26&B287
3$
3+26&B,1
3$
3+26&B287
3$
1567
3$
3&
3$
3&
3&
3&
3&
3&
3&
966$
3&
9''$
3%
3$:.83
3%
3$
3%
3$
3%
966B
3%
3%
3%
3%
3%
3&
3&
3$
3$
3$
3$
9''B
3$
966B
/4)3
9''B
9/&'
DLG
1. This figure shows the package top view.
9''B
966B
3%
3%
%227
3%
3%
3%
3%
3%
3$
3$
Figure 7. STM32L15xCx LQFP48 pinout
9/&' 3&:.83 3&26&B,1 3&26&B287 3+26&B,1 3+26&B287 1567 966$ 9''$ 3$:.83 3$ 3$ /4)3
9''B
966B
3$
3$
3$
3$
3$
3$
3%
3%
3%
3%
3$
3$
3$
3$
3$
3%
3%
3%
3%
3%
966B
9''B
DLG
1. This figure shows the package top view.
34/132
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STM32L151x6/8/B, STM32L152x6/8/B
Pin descriptions
0!
6$$?
0#7+50
633?
0#/3#?).
0!
0#/3#?/54
0!
0(/3#?).
0!
0(/3#?/54
0!
.234
0!
633!
0!
6$$!
0"
0!7+50
0"
0!
0!
0"
0"
633?
0!
0"
0"
0"
0"
0"
0"
0"
0"
0!
0"
"//4
0"
0!
0"
0!
633?
0!
6,#$
0!
6$$?
Figure 8. STM32L15xCx UFQFPN48 pinout
6$$?
0"
5&1&0.
AID
1. This figure shows the package top view.
DocID17659 Rev 11
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48
Pin descriptions
STM32L151x6/8/B, STM32L152x6/8/B
Table 7. Legend/abbreviations used in the pinout table
Name
Pin name
Pin type
I/O structure
Notes
Abbreviation
Definition
Unless otherwise specified in brackets below the pin name, the pin function
during and after reset is the same as the actual pin name
S
Supply pin
I
Input only pin
I/O
Input / output pin
FT
5 V tolerant I/O
TC
Standard 3.3 V I/O
B
Dedicated BOOT0 pin
RST
Bidirectional reset pin with embedded weak pull-up resistor
Unless otherwise specified by a note, all I/Os are set as floating inputs during
and after reset
Alternate
Functions selected through GPIOx_AFR registers
functions
Pin
functions
36/132
Additional
Functions directly selected/enabled through peripheral registers
functions
DocID17659 Rev 11
STM32L151x6/8/B, STM32L152x6/8/B
Pin descriptions
Table 8. STM32L151x6/8/B and STM32L152x6/8/B pin definitions
LQFP64
TFBGA64
UFBGA100
LQFP48 or UFQFPN48
Pin type(1)
I/O structure
Pins functions
LQFP100
Pins
Main
function(2)
(after reset)
1
-
-
B2
-
PE2
I/O
FT
PE2
TRACECLK/LCD_SEG38/
TIM3_ETR
-
2
-
-
A1
-
PE3
I/O
FT
PE3
TRACED0/LCD_SEG39/
TIM3_CH1
-
3
-
-
B1
-
PE4
I/O
FT
PE4
TRACED1/TIM3_CH2
-
4
-
-
C2
-
PE5
I/O
FT
PE5
TRACED2/TIM9_CH1
-
5
-
-
D2
-
PE6-WKUP3 I/O
FT
PE6
TRACED3/TIM9_CH2
WKUP3
6
1
B2
E2
1
VLCD(3)
VLCD
-
-
PC13WKUP2
Pin name
S
Alternate functions
Additional
functions
I/O
FT
PC13
-
RTC_TAMP1/
RTC_TS/
RTC_OUT/
WKUP2
PC14I/O
OSC32_IN(4)
TC
PC14
-
OSC32_IN
TC
PC15
-
OSC32_OUT
S
-
VSS_5
-
-
VDD_5
S
-
VDD_5
-
-
5
PH0OSC_IN(5)
I/O
TC
PH0
-
OSC_IN
G1
6
PH1OSC_OUT
I/O
TC
PH1
-
OSC_OUT
E1
H2
7
NRST
NRST
-
-
8
E3
H1
-
PC0
I/O
FT
PC0
LCD_SEG18
ADC_IN10/
/COMP1_INP
16
9
E2
J2
-
PC1
I/O
FT
PC1
LCD_SEG19
ADC_IN11/
COMP1_INP
17
10 F2
J3
-
PC2
I/O
FT
PC2
LCD_SEG20
ADC_IN12/
COMP1_INP
18
11 -(6)
K2
-
PC3
I/O
TC
PC3
LCD_SEG21
ADC_IN13/
COMP1_INP
7
2
A2
C1
2
8
3
A1
D1
3
9
4
B1
E1
4
10
-
-
F2
-
VSS_5
11
-
-
G2
-
12
5
C1
F1
13
6
D1
14
7
15
PC15OSC32_OUT I/O
(4)
I/O RST
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48
Pin descriptions
STM32L151x6/8/B, STM32L152x6/8/B
Table 8. STM32L151x6/8/B and STM32L152x6/8/B pin definitions (continued)
UFBGA100
LQFP48 or UFQFPN48
12 F1
J1
8
I/O structure
TFBGA64
19
Pin type(1)
LQFP64
Pins functions
LQFP100
Pins
Main
function(2)
(after reset)
VSSA
S
-
VSSA
-
-
K1
-
VREF-
S
-
VREF-
-
-
(6)
L1
-
VREF+
S
-
VREF+
-
-
13 H1
M1
9
VDDA
S
-
VDDA
-
-
FT
PA0
USART2_CTS/
TIM2_CH1_ETR
WKUP1/
ADC_IN0/
COMP1_INP
20
-
21
-
22
G1
Pin name
PA0-WKUP1 I/O
Alternate functions
Additional
functions
23
14 G2
L2
10
24
15 H2
M2
11
PA1
I/O
FT
PA1
USART2_RTS/
TIM2_CH2/LCD_SEG0
ADC_IN1/
COMP1_INP
25
16 F3
K3
12
PA2
I/O
FT
PA2
USART2_TX/TIM2_CH3/
TIM9_CH1/LCD_SEG1
ADC_IN2/
COMP1_INP
26
17 G3
L3
13
PA3
I/O
TC
PA3
USART2_RX/TIM2_CH4/
TIM9_CH2/LCD_SEG2
ADC_IN3/
COMP1_INP
27
18 C2
E3
-
VSS_4
S
-
VSS_4
-
-
28
19 D2
H3
-
VDD_4
S
-
VDD_4
-
ADC_IN4/
DAC_OUT1/
COMP1_INP
29
20 H3
M3
14
PA4
I/O
TC
PA4
SPI1_NSS/USART2_CK
30
21 F4
K4
15
PA5
I/O
TC
PA5
SPI1_SCK/
TIM2_CH1_ETR
ADC_IN5/
DAC_OUT2/
COMP1_INP
31
22 G4
L4
16
PA6
I/O
FT
PA6
SPI1_MISO/TIM3_CH1/
LCD_SEG3/TIM10_CH1
ADC_IN6
/COMP1_INP
32
23 H4
M4
17
PA7
I/O
FT
PA7
SPI1_MOSI//TIM3_CH2/
LCD_SEG4/TIM11_CH1
ADC_IN7/
COMP1_INP
33
24 H5
K5
-
PC4
I/O
FT
PC4
LCD_SEG22
ADC_IN14/
COMP1_INP
34
25 H6
L5
-
PC5
I/O
FT
PC5
LCD_SEG23
ADC_IN15/
COMP1_INP
38/132
DocID17659 Rev 11
STM32L151x6/8/B, STM32L152x6/8/B
Pin descriptions
Table 8. STM32L151x6/8/B and STM32L152x6/8/B pin definitions (continued)
LQFP64
TFBGA64
UFBGA100
LQFP48 or UFQFPN48
Pin type(1)
I/O structure
Pins functions
LQFP100
Pins
Main
function(2)
(after reset)
35
26 F5
M5
18
PB0
I/O
TC
PB0
TIM3_CH3/LCD_SEG5
ADC_IN8/
COMP1_INP/
VREF_OUT
36
27 G5
M6
19
PB1
I/O
FT
PB1
TIM3_CH4/LCD_SEG6
ADC_IN9/
COMP1_INP/
VREF_OUT
37
28 G6
L6
20
PB2
I/O
FT
PB2/BOOT1
BOOT1
-
Pin name
Alternate functions
Additional
functions
38
-
-
M7
-
PE7
I/O
TC
PE7
-
ADC_IN22/
COMP1_INP
39
-
-
L7
-
PE8
I/O
TC
PE8
-
ADC_IN23/
COMP1_INP
40
-
-
M8
-
PE9
I/O
TC
PE9
TIM2_CH1_ETR
ADC_IN24/
COMP1_INP
41
-
-
L8
-
PE10
I/O
TC
PE10
TIM2_CH2
ADC_IN25/
COMP1_INP
42
-
-
M9
-
PE11
I/O
FT
PE11
TIM2_CH3
-
43
-
-
L9
-
PE12
I/O
FT
PE12
TIM2_CH4/SPI1_NSS
-
44
-
-
M10
-
PE13
I/O
FT
PE13
SPI1_SCK
-
45
-
-
M11
-
PE14
I/O
FT
PE14
SPI1_MISO
-
46
-
-
M12
-
PE15
I/O
FT
PE15
SPI1_MOSI
-
47
29 G7 L10
21
PB10
I/O
FT
PB10
I2C2_SCL/USART3_TX/
TIM2_CH3/LCD_SEG10
-
48
30 H7
L11
22
PB11
I/O
FT
PB11
I2C2_SDA/USART3_RX/
TIM2_CH4/LCD_SEG11
-
49
31 D6 F12
23
VSS_1
S
-
VSS_1
-
-
50
32 E6 G12
24
VDD_1
S
-
VDD_1
-
-
51
33 H8 L12
25
PB12
I/O
FT
PB12
SPI2_NSS/I2C2_SMBA/
USART3_CK/
LCD_SEG12/TIM10_CH1
ADC_IN18/
COMP1_INP
52
34 G8 K12
26
PB13
I/O
FT
PB13
SPI2_SCK/USART3_CTS/
LCD_SEG13/
TIM9_CH1
DocID17659 Rev 11
ADC_IN19/
COMP1_INP
39/132
48
Pin descriptions
STM32L151x6/8/B, STM32L152x6/8/B
Table 8. STM32L151x6/8/B and STM32L152x6/8/B pin definitions (continued)
54
27
36 F7 K10
PB14
I/O structure
K11
Pin name
Pin type(1)
35 F8
LQFP48 or UFQFPN48
LQFP64
53
Pins functions
UFBGA100
LQFP100
TFBGA64
Pins
Main
function(2)
(after reset)
I/O
FT
PB14
Alternate functions
Additional
functions
SPI2_MISO/
USART3_RTS/
LCD_SEG14//TIM9_CH2
ADC_IN20/
COMP1_INP
ADC_IN21/
COMP1_INP/
RTC_REFIN
28
PB15
I/O
FT
PB15
SPI2_MOSI/LCD_SEG15/
TIM11_CH1
55
-
-
K9
-
PD8
I/O
FT
PD8
USART3_TX/
LCD_SEG28
-
56
-
-
K8
-
PD9
I/O
FT
PD9
USART3_RX/
LCD_SEG29
-
57
-
-
J12
-
PD10
I/O
FT
PD10
USART3_CK/
LCD_SEG30
-
58
-
-
J11
-
PD11
I/O
FT
PD11
USART3_CTS/
LCD_SEG31
-
59
-
-
J10
-
PD12
I/O
FT
PD12
TIM4_CH1/
USART3_RTS/
LCD_SEG32
-
60
-
-
H12
-
PD13
I/O
FT
PD13
TIM4_CH2/LCD_SEG33
-
61
-
-
H11
-
PD14
I/O
FT
PD14
TIM4_CH3/LCD_SEG34
-
62
-
-
H10
-
PD15
I/O
FT
PD15
TIM4_CH4/LCD_SEG35
-
63
37 F6 E12
-
PC6
I/O
FT
PC6
TIM3_CH1/LCD_SEG24
-
64
38 E7
E11
-
PC7
I/O
FT
PC7
TIM3_CH2/LCD_SEG25
-
65
39 E8 E10
-
PC8
I/O
FT
PC8
TIM3_CH3/LCD_SEG26
-
66
40 D8 D12
-
PC9
I/O
FT
PC9
TIM3_CH4/LCD_SEG27
-
67
41 D7 D11
29
PA8
I/O
FT
PA8
USART1_CK/MCO/
LCD_COM0
-
68
42 C7 D10
30
PA9
I/O
FT
PA9
USART1_TX/LCD_COM1
-
69
43 C6 C12
31
PA10
I/O
FT
PA10
USART1_RX/LCD_COM2
-
70
44 C8 B12
32
PA11
I/O
FT
PA11
USART1_CTS/
SPI1_MISO
USB_DM
40/132
DocID17659 Rev 11
STM32L151x6/8/B, STM32L152x6/8/B
Pin descriptions
Table 8. STM32L151x6/8/B and STM32L152x6/8/B pin definitions (continued)
Pins functions
Pin type(1)
I/O structure
71
45 B8 A12
33
PA12
I/O
FT
PA12
USART1_RTS/
SPI1_MOSI
USB_DP
72
46 A8
A11
34
PA13
I/O
FT
JTMSSWDIO
JTMS-SWDIO
-
C11
-
PH2
I/O
FT
PH2
-
-
73
-
-
UFBGA100
LQFP64
Main
function(2)
(after reset)
TFBGA64
LQFP100
LQFP48 or UFQFPN48
Pins
Pin name
Alternate functions
Additional
functions
74
47 D5
F11
35
VSS_2
S
-
VSS_2
-
-
75
48 E5 G11
36
VDD_2
S
-
VDD_2
-
-
76
49 A7 A10
37
PA14
I/O
FT
JTCK
-SWCLK
JTCK-SWCLK
-
77
50 A6
A9
38
PA15
I/O
FT
JTDI
TIM2_CH1_ETR/PA15/
SPI1_NSS/
LCD_SEG17
-
78
51 B7
B11
-
PC10
I/O
FT
PC10
USART3_TX/LCD_SEG28
/LCD_SEG40/LCD_COM4
-
79
52 B6 C10
-
PC11
I/O
FT
PC11
USART3_RX/LCD_SEG29
/LCD_SEG41/LCD_COM5
-
80
53 C5 B10
-
PC12
I/O
FT
PC12
USART3_CK/LCD_SEG30
/LCD_SEG42/LCD_COM6
-
81
-
-
C9
-
PD0
I/O
FT
PD0
SPI2_NSS/TIM9_CH1
-
82
-
-
B9
-
PD1
I/O
FT
PD1
SPI2_SCK
-
C8
-
PD2
I/O
FT
PD2
TIM3_ETR/LCD_SEG31/
LCD_SEG43/LCD_COM7
-
83
54 B5
84
-
-
B8
-
PD3
I/O
FT
PD3
USART2_CTS/
SPI2_MISO
-
85
-
-
B7
-
PD4
I/O
FT
PD4
USART2_RTS/
SPI2_MOSI
-
86
-
-
A6
-
PD5
I/O
FT
PD5
USART2_TX
-
87
-
-
B6
-
PD6
I/O
FT
PD6
USART2_RX
-
88
-
-
A5
-
PD7
I/O
FT
PD7
USART2_CK/TIM9_CH2
-
A8
39
PB3
I/O
FT
JTDO
TIM2_CH2/PB3/
SPI1_SCK/LCD_SEG7/
JTDO
COMP2_INM
89
55 A5
DocID17659 Rev 11
41/132
48
Pin descriptions
STM32L151x6/8/B, STM32L152x6/8/B
Table 8. STM32L151x6/8/B and STM32L152x6/8/B pin definitions (continued)
LQFP64
TFBGA64
UFBGA100
LQFP48 or UFQFPN48
Pin type(1)
I/O structure
Pins functions
LQFP100
Pins
Main
function(2)
(after reset)
90
56 A4
A7
40
PB4
I/O
FT
NJTRST
TIM3_CH1/PB4/
SPI1_MISO/LCD_SEG8/
NJTRST
COMP2_INP
91
57 C4
C5
41
PB5
I/O
FT
PB5
I2C1_SMBA/TIM3_CH2/
SPI1_MOSI/LCD_SEG9
COMP2_INP
92
58 D3
B5
42
PB6
I/O
FT
PB6
I2C1_SCL/TIM4_CH1/
USART1_TX
93
59 C3
B4
43
PB7
I/O
FT
PB7
I2C1_SDA/TIM4_CH2/
USART1_RX
PVD_IN
94
60 B4
A4
44
BOOT0
I
B
BOOT0
-
-
95
61 B3
A3
45
PB8
I/O
FT
PB8
TIM4_CH3/I2C1_SCL/
LCD_SEG16/TIM10_CH1
-
96
62 A3
B3
46
PB9
I/O
FT
PB9
TIM4_CH4/I2C1_SDA/
LCD_COM3/TIM11_CH1
-
Pin name
Alternate functions
Additional
functions
97
-
-
C3
-
PE0
I/O
FT
PE0
TIM4_ETR/LCD_SEG36/
TIM10_CH1
-
98
-
-
A2
-
PE1
I/O
FT
PE1
LCD_SEG37/TIM11_CH1
-
63 D4
D3
47
VSS_3
S
-
VSS_3
-
-
100 64 E4
C4
48
VDD_3
S
-
VDD_3
-
-
99
1. I = input, O = output, S = supply.
2. Function availability depends on the chosen device. For devices having reduced peripheral counts, it is always the lower
number of peripheral that is included. For example, if a device has only one SPI and two USARTs, they will be called SPI1
and USART1 & USART2, respectively. Refer to Table 2 on page 11.
3. Applicable to STM32L152xx devices only. In STM32L151xx devices, this pin should be connected to VDD.
4. The PC14 and PC15 I/Os are only configured as OSC32_IN/OSC32_OUT when the LSE oscillator is on (by setting the
LSEON bit in the RCC_CSR register). The LSE oscillator pins OSC32_IN/OSC32_OUT can be used as general-purpose
PC14/PC15 I/Os, respectively, when the LSE oscillator is off (after reset, the LSE oscillator is off). The LSE has priority
over the GPIO function. For more details, refer to Using the OSC32_IN/OSC32_OUT pins as GPIO PC14/PC15 port pins
section in the STM32L1xxxx reference manual (RM0038).
5. The PH0 and PH1 I/Os are only configured as OSC_IN/OSC_OUT when the HSE oscillator is on (by setting the HSEON
bit in the RCC_CR register). The HSE oscillator pins OSC_IN/OSC_OUT can be used as general-purpose PH0/PH1 I/Os,
respectively, when the HSE oscillator is off (after reset, the HSE oscillator is off). The HSE has priority over the GPIO
function.
6. Unlike in the LQFP64 package, there is no PC3 in the TFBGA64 package. The VREF+ functionality is provided instead.
42/132
DocID17659 Rev 11
Digital alternate function number
AFIO0
AFIO1
AFIO2
AFIO3
AFIO4
AFIO5
AFOI6
AFIO7
AFIO8 AFIO9
AFIO11
AFIO12 AFIO13
AFIO14
AFIO15
Port name
Alternate function
SYSTEM
BOOT0
BOOT0
NRST
NRST
TIM2
TIM3/4
TIM9/10/11
I2C1/2
SPI1/2
N/A
USART1/2/3
N/A
N/A
LCD
N/A
N/A
RI
SYSTEM
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
DocID17659 Rev 11
-
-
-
-
-
-
-
-
-
-
-
-
PA0-WKUP1
-
TIM2_CH1_ETR
-
-
-
-
-
USART2_CTS
-
-
-
-
-
TIMx_IC1 EVENTOUT
PA1
-
TIM2_CH2
-
-
-
-
-
USART2_RTS
-
-
[SEG0]
-
-
TIMx_IC2 EVENTOUT
PA2
-
TIM2_CH3
-
TIM9_CH1
-
-
-
USART2_TX
-
-
[SEG1]
-
-
TIMx_IC3 EVENTOUT
PA3
-
TIM2_CH4
-
TIM9_CH2
-
USART2_RX
-
-
[SEG2]
-
-
TIMx_IC4 EVENTOUT
PA4
-
-
-
-
-
SPI1_NSS
-
USART2_CK
-
-
-
-
-
TIMx_IC1 EVENTOUT
PA5
-
TIM2_CH1_ETR
-
-
-
SPI1_SCK
-
-
-
-
-
-
-
TIMx_IC2 EVENTOUT
PA6
-
-
TIM3_CH1 TIM10_CH1
-
SPI1_MISO
-
-
-
-
[SEG3]
-
-
TIMx_IC3 EVENTOUT
TIM3_CH2 TIM11_CH1
-
-
-
PA7
-
-
-
SPI1_MOSI
-
-
-
[SEG4]
-
-
TIMx_IC4 EVENTOUT
PA8
MCO
-
-
-
-
-
-
USART1_CK
-
-
[COM0]
-
-
TIMx_IC1 EVENTOUT
PA9
-
-
-
-
-
-
-
USART1_TX
-
-
[COM1]
-
-
TIMx_IC2 EVENTOUT
PA10
-
-
-
-
-
-
-
USART1_RX
-
-
[COM2]
-
-
TIMx_IC3 EVENTOUT
PA11
-
-
-
-
-
SPI1_MISO
-
USART1_CTS
-
-
-
-
-
TIMx_IC4 EVENTOUT
PA12
-
-
-
-
-
SPI1_MOSI
-
USART1_RTS
-
-
-
-
-
TIMx_IC1 EVENTOUT
PA13
JTMSSWDIO
-
-
-
-
-
-
-
-
-
-
-
-
TIMx_IC2 EVENTOUT
PA14
JTCKSWCLK
-
-
-
-
-
-
-
-
-
-
-
-
TIMx_IC3 EVENTOUT
PA15
JTDI
TIMx_IC4 EVENTOUT
-
-
-
-
-
-
-
SEG17
-
-
-
-
TIM3_CH3
-
-
-
-
-
-
-
[SEG5]
-
-
-
EVENTOUT
PB1
-
-
TIM3_CH4
-
-
-
-
-
-
-
[SEG6]
-
-
-
EVENTOUT
-
-
-
-
-
-
-
-
-
-
-
-
EVENTOUT
-
-
-
SPI1_SCK
-
-
-
-
[SEG7]
-
-
-
EVENTOUT
TIM3_CH1
-
-
SPI1_MISO
-
-
-
-
[SEG8]
-
-
-
EVENTOUT
PB2
BOOT1
43/132
PB3
JTDO
PB4
NJTRST
TIM2_CH2
-
SPI1_NSS
-
Pin descriptions
TIM2_CH1_ETR
PB0
STM32L151x6/8/B, STM32L152x6/8/B
Table 9. Alternate function input/output
Digital alternate function number
AFIO0
AFIO1
AFIO2
AFIO3
AFIO4
AFIO5
AFOI6
AFIO7
AFIO8 AFIO9
AFIO11
AFIO12 AFIO13
AFIO14
AFIO15
Port name
Alternate function
SYSTEM
TIM2
TIM3/4
TIM9/10/11
I2C1/2
SPI1/2
N/A
USART1/2/3
N/A
N/A
PB5
-
-
TIM3_CH2
-
I2C1_
SMBA
SPI1_MOSI
-
-
-
-
PB6
-
-
TIM4_CH1
-
I2C1_SCL
-
-
USART1_TX
-
-
PB7
-
-
TIM4_CH2
-
I2C1_SDA
-
-
USART1_RX
-
-
LCD
N/A
N/A
RI
SYSTEM
-
-
-
EVENTOUT
-
-
-
-
EVENTOUT
-
-
-
-
EVENTOUT
[SEG9]
DocID17659 Rev 11
-
-
TIM4_CH3 TIM10_CH1* I2C1_SCL
-
-
-
-
-
SEG16
-
-
-
EVENTOUT
PB9
-
-
TIM4_CH4 TIM11_CH1*
I2C1_SDA
-
-
-
-
-
[COM3]
-
-
-
EVENTOUT
PB10
-
TIM2_CH3
-
-
I2C2_SCL
-
-
USART3_TX
-
-
SEG10
-
-
-
EVENTOUT
PB11
-
TIM2_CH4
-
-
I2C2_SDA
-
-
USART3_RX
-
-
SEG11
-
-
-
EVENTOUT
PB12
-
-
-
TIM10_CH1
PB13
-
-
-
PB14
-
-
PB15
-
PC0
PC1
I2C2_
SMBA
SPI2_NSS
-
USART3_CK
-
-
SEG12
-
-
-
EVENTOUT
TIM9_CH1
-
SPI2_SCK
-
USART3_CTS
-
-
SEG13
-
-
-
EVENTOUT
-
TIM9_CH2
-
SPI2_MISO
-
USART3_RTS
-
-
SEG14
-
-
-
EVENTOUT
-
-
TIM11_CH1
-
SPI2_MOSI
-
-
-
-
SEG15
-
-
-
EVENTOUT
-
-
-
-
-
-
-
-
-
-
SEG18
-
-
TIMx_IC1 EVENTOUT
-
-
-
-
-
-
-
-
-
-
SEG19
-
-
TIMx_IC2 EVENTOUT
PC2
-
-
-
-
-
-
-
-
-
-
SEG20
-
-
TIMx_IC3 EVENTOUT
PC3
-
-
-
-
-
-
-
-
-
-
SEG21
-
-
TIMx_IC4 EVENTOUT
PC4
-
-
-
-
-
-
-
-
-
-
SEG22
-
-
TIMx_IC1 EVENTOUT
PC5
-
-
-
-
-
-
-
-
-
-
SEG23
-
-
TIMx_IC2 EVENTOUT
PC6
-
-
TIM3_CH1
-
-
-
-
-
-
-
SEG24
-
-
TIMx_IC3 EVENTOUT
PC7
-
-
TIM3_CH2
-
-
-
-
-
-
-
SEG25
-
-
TIMx_IC4 EVENTOUT
PC8
-
-
TIM3_CH3
-
-
-
-
-
-
-
SEG26
-
-
TIMx_IC1 EVENTOUT
PC9
-
-
TIM3_CH4
-
-
-
-
-
-
-
SEG27
-
-
TIMx_IC2 EVENTOUT
PC10
-
-
-
-
-
-
-
-
-
COM4 /
SEG28 /
SEG40
-
-
TIMx_IC3 EVENTOUT
USART3_TX
STM32L151x6/8/B, STM32L152x6/8/B
PB8
Pin descriptions
44/132
Table 9. Alternate function input/output (continued)
Digital alternate function number
AFIO0
AFIO1
AFIO2
AFIO3
AFIO4
AFIO5
AFOI6
AFIO7
AFIO8 AFIO9
AFIO11
AFIO12 AFIO13
AFIO14
AFIO15
RI
SYSTEM
Port name
Alternate function
DocID17659 Rev 11
SYSTEM
TIM2
TIM3/4
TIM9/10/11
I2C1/2
SPI1/2
N/A
PC11
-
-
-
-
-
-
-
PC12
-
-
-
-
-
-
-
PC13WKUP2
-
-
-
-
-
-
-
PC14OSC32_IN
-
-
-
-
-
-
PC15OSC32_OUT
-
-
-
-
-
-
PD0
-
-
-
PD1
-
-
-
PD2
-
-
TIM3_ETR
TIM9_CH1
USART1/2/3
N/A
N/A
LCD
N/A
N/A
USART3_RX
-
-
COM5 /
SEG29 /
SEG41
-
-
TIMx_IC4 EVENTOUT
USART3_CK
-
-
COM6 /
SEG30 /
SEG42
-
-
TIMx_IC1 EVENTOUT
-
-
-
-
-
-
TIMx_IC2 EVENTOUT
-
-
-
-
-
-
-
TIMx_IC3 EVENTOUT
-
-
-
-
-
-
-
TIMx_IC4 EVENTOUT
-
SPI2_NSS
-
-
-
-
-
-
-
TIMx_IC1 EVENTOUT
-
-
SPI2_SCK
-
-
-
-
-
-
-
TIMx_IC2 EVENTOUT
-
-
-
-
-
-
COM7 /
SEG31 /
SEG43
-
-
TIMx_IC3 EVENTOUT
-
PD3
-
-
-
-
-
SPI2_MISO
-
USART2_CTS
-
-
-
-
-
TIMx_IC4 EVENTOUT
PD4
-
-
-
-
-
SPI2_MOSI
-
USART2_RTS
-
-
-
-
-
TIMx_IC1 EVENTOUT
PD5
-
-
-
-
-
-
-
USART2_TX
-
-
-
-
-
TIMx_IC2 EVENTOUT
PD6
-
-
-
-
-
-
-
USART2_RX
-
-
-
-
-
TIMx_IC3 EVENTOUT
-
-
-
-
-
-
USART2_CK
-
-
-
-
-
TIMx_IC4 EVENTOUT
PD8
-
-
-
TIM9_CH2
-
-
-
-
USART3_TX
-
-
-
-
-
TIMx_IC1 EVENTOUT
PD9
-
-
-
-
-
-
-
USART3_RX
-
-
-
-
-
TIMx_IC2 EVENTOUT
PD10
-
-
-
-
-
-
-
USART3_CK
-
-
-
-
-
TIMx_IC3 EVENTOUT
45/132
PD11
-
-
-
-
-
-
-
USART3_CTS
-
-
-
-
-
TIMx_IC4 EVENTOUT
PD12
-
-
TIM4_CH1
-
-
-
-
USART3_RTS
-
-
-
-
-
TIMx_IC1 EVENTOUT
Pin descriptions
PD7
STM32L151x6/8/B, STM32L152x6/8/B
Table 9. Alternate function input/output (continued)
Digital alternate function number
AFIO0
AFIO1
AFIO2
AFIO3
AFIO4
AFIO5
AFOI6
AFIO7
AFIO8 AFIO9
AFIO11
AFIO12 AFIO13
AFIO14
AFIO15
RI
SYSTEM
Port name
Alternate function
DocID17659 Rev 11
TIM2
TIM3/4
TIM9/10/11
I2C1/2
SPI1/2
N/A
USART1/2/3
N/A
N/A
LCD
N/A
N/A
PD13
-
-
TIM4_CH2
-
-
-
-
-
-
-
-
-
-
TIMx_IC2 EVENTOUT
PD14
-
-
TIM4_CH3
-
-
-
-
-
-
-
-
-
-
TIMx_IC3 EVENTOUT
PD15
-
-
TIM4_CH4
-
-
-
-
-
-
-
-
-
-
TIMx_IC4 EVENTOUT
PE0
-
-
TIM4_ETR TIM10_CH1
-
-
-
-
-
-
-
-
-
TIMx_IC1 EVENTOUT
PE1
-
-
TIM11_CH1
-
-
-
-
-
-
-
-
-
TIMx_IC2 EVENTOUT
PE2
TRACEC
K
-
TIM3_ETR
-
-
-
-
-
-
-
-
-
-
TIMx_IC3 EVENTOUT
PE3
TRACED
0
-
TIM3_CH1
-
-
-
-
-
-
-
-
-
-
TIMx_IC4 EVENTOUT
PE4
TRACED
1
-
TIM3_CH2
-
-
-
-
-
-
-
-
-
-
TIMx_IC1 EVENTOUT
PE5
TRACED
2
-
-
TIM9_CH1*
-
-
-
-
-
-
-
-
-
TIMx_IC2 EVENTOUT
PE6
TRACED
3
-
-
TIM9_CH2*
-
-
-
-
-
-
-
-
-
TIMx_IC3 EVENTOUT
PE7
-
-
-
-
-
-
-
-
-
-
-
-
-
TIMx_IC4 EVENTOUT
PE8
-
-
-
-
-
-
-
-
-
-
-
-
-
TIMx_IC1 EVENTOUT
PE9
-
TIM2_CH1_ETR
-
-
-
-
-
-
-
-
-
-
-
TIMx_IC2 EVENTOUT
PE10
-
TIM2_CH2
-
-
-
-
-
-
-
-
-
-
-
TIMx_IC3 EVENTOUT
PE11
-
TIM2_CH3
-
-
-
-
-
-
-
-
-
-
-
TIMx_IC4 EVENTOUT
PE12
-
TIM2_CH4
-
-
-
SPI1_NSS
-
-
-
-
-
-
-
TIMx_IC1 EVENTOUT
PE13
-
-
-
-
-
SPI1_SCK
-
-
-
-
-
-
-
TIMx_IC2 EVENTOUT
PE14
-
-
-
-
-
SPI1_MISO
-
-
-
-
-
-
-
TIMx_IC3 EVENTOUT
PE15
-
-
-
-
-
SPI1_MOSI
-
-
-
-
-
-
-
TIMx_IC4 EVENTOUT
PH0OSC_IN
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
STM32L151x6/8/B, STM32L152x6/8/B
SYSTEM
Pin descriptions
46/132
Table 9. Alternate function input/output (continued)
Digital alternate function number
AFIO0
AFIO1
AFIO2
AFIO3
AFIO4
AFIO5
AFOI6
AFIO7
AFIO8 AFIO9
AFIO11
AFIO12 AFIO13
AFIO14
AFIO15
Port name
Alternate function
SYSTEM
TIM2
TIM3/4
TIM9/10/11
I2C1/2
SPI1/2
N/A
USART1/2/3
N/A
N/A
LCD
N/A
N/A
RI
SYSTEM
PH1OSC_OUT
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
PH2
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
STM32L151x6/8/B, STM32L152x6/8/B
Table 9. Alternate function input/output (continued)
DocID17659 Rev 11
Pin descriptions
47/132
Memory mapping
5
STM32L151x6/8/B, STM32L152x6/8/B
Memory mapping
The memory map is shown in the following figure.
Figure 9. Memory map
!0"MEMORYSPACE
X&&&&&&&&
RESERVED
X%
X
X
X
X&&&&&&&&
X
X#
X%
X%
X
RESERVED
RESERVED
$-!
RESERVED
&LASH)NTERF ACE
2##
RESERVED
X
#ORTEX -)NTERNAL 0ERIPHERALS
X
X
X
X
X#
X
X#
X
X
#2#
RESERVED
0ORT(
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0ORT$
0ORT#
0ORT"
0ORT!
RESERVED
X#
X
X
X!
X
53!24
RESERVED
30)
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X
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X
X
X
X#
X
X
X&&&
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RESE RVED
X
X#
X&&
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3YSTEMMEMORY
X
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072
X
X
0ERIPHERALS
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X
BYTE
53"
53"2EG ISTERS
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X
RESE RVED
32!-
X
X#
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53!24
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RESE RVED
X
X#
X
X
X
RESERVED
30)
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)7$'
X
77$'
X#
&LASHMEMORY
2ESERVED
X
X
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!LIASEDTO&LASHORSYSTEM
MEMORYDEPENDINGON
X "//4PINS
X#
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X#
24#
,#$
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4)-
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X
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-36
48/132
DocID17659 Rev 11
STM32L151x6/8/B, STM32L152x6/8/B
Electrical characteristics
6
Electrical characteristics
6.1
Parameter conditions
Unless otherwise specified, all voltages are referenced to VSS.
6.1.1
Minimum and maximum values
Unless otherwise specified the minimum and maximum values are guaranteed in the worst
conditions of ambient temperature, supply voltage and frequencies by tests in production on
100% of the devices with an ambient temperature at TA = 25 °C and TA = TAmax (given by
the selected temperature range).
Data based on characterization results, design simulation and/or technology characteristics
are indicated in the table footnotes and are not tested in production. Based on
characterization, the minimum and maximum values refer to sample tests and represent the
mean value plus or minus three times the standard deviation (mean±3σ).
Please refer to device ErrataSheet for possible latest changes of electrical characteristics.
6.1.2
Typical values
Unless otherwise specified, typical data are based on TA = 25 °C, VDD = 3.6 V (for the
1.65 V ≤ VDD ≤ 3.6 V voltage range). They are given only as design guidelines and are not
tested.
Typical ADC accuracy values are determined by characterization of a batch of samples from
a standard diffusion lot over the full temperature range, where 95% of the devices have an
error less than or equal to the value indicated (mean±2σ).
6.1.3
Typical curves
Unless otherwise specified, all typical curves are given only as design guidelines and are
not tested.
6.1.4
Loading capacitor
The loading conditions used for pin parameter measurement are shown in Figure 10.
6.1.5
Pin input voltage
The input voltage measurement on a pin of the device is described in Figure 11.
DocID17659 Rev 11
49/132
105
Electrical characteristics
STM32L151x6/8/B, STM32L152x6/8/B
Figure 10. Pin loading conditions
Figure 11. Pin input voltage
0&8SLQ
0&8SLQ
& S)
9,1
069
6.1.6
069
Power supply scheme
Figure 12. Power supply scheme
287
*3,2V
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069
50/132
DocID17659 Rev 11
STM32L151x6/8/B, STM32L152x6/8/B
6.1.7
Electrical characteristics
Optional LCD power supply scheme
Figure 13. Optional LCD power supply scheme
VSEL
VDD
N x 100 nF
+ 1 x 10 μF
Option 1
VDD1/2/.../N
Step-up
Converter
VLCD
100 nF
LCD
VLCD
Option 2
CEXT
VSS1/2/.../N
MS32462V1
1. Option 1: LCD power supply is provided by a dedicated VLCD supply source, VSEL switch is open.
2. Option 2: LCD power supply is provided by the internal step-up converter, VSEL switch is closed, an
external capacitance is needed for correct behavior of this converter.
6.1.8
Current consumption measurement
Figure 14. Current consumption measurement scheme
$
1[Q)
[)
1[9''
1[966
9/&'
9''$
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)
95()
95()
966$
069
DocID17659 Rev 11
51/132
105
Electrical characteristics
6.2
STM32L151x6/8/B, STM32L152x6/8/B
Absolute maximum ratings
Stresses above the absolute maximum ratings listed in Table 10: Voltage characteristics,
Table 11: Current characteristics, and Table 12: Thermal characteristics 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.
Table 10. Voltage characteristics
Symbol
VDD–VSS
VIN(2)
Ratings
Min
Max
–0.3
4.0
Input voltage on five-volt tolerant pin
VSS −0.3
VDD+4.0
Input voltage on any other pin
VSS − 0.3
4.0
External main supply voltage
(including VDDA and VDD)(1)
|ΔVDDx|
Variations between different VDD power pins
-
50
|VSSX − VSS|
Variations between all different ground pins
-
50
-
0.4
VREF+ − VDDA Allowed voltage difference for VREF+ > VDDA
VESD(HBM)
Electrostatic discharge voltage
(human body model)
Unit
V
mV
V
see Section 6.3.11
-
1. All main power (VDD, VDDA) and ground (VSS, VSSA) pins must always be connected to the external power
supply, in the permitted range.
2.
VIN maximum must always be respected. Refer to Table 11 for maximum allowed injected current values.
Table 11. Current characteristics
Symbol
Ratings
Max.
IVDDΣ
Total current into VDD/VDDA power lines (source)(1)
80
IVSSΣ
Total current out of VSS ground lines (sink)(1)
80
Output current sunk by any I/O and control pin
25
IIO
IINJ(PIN) (2)
ΣIINJ(PIN)
Output current sourced by any I/O and control pin
Injected current on five-volt tolerant I/O
(3)
Unit
- 25
-5/+0
Injected current on any other pin (4)
±5
Total injected current (sum of all I/O and control pins)(5)
± 25
mA
1. All main power (VDD, VDDA) and ground (VSS, VSSA) pins must always be connected to the external power
supply, in the permitted range.
2. Negative injection disturbs the analog performance of the device. See note in Section 6.3.17.
3. Positive current injection is not possible on these I/Os. A negative injection is induced by VIN<VSS. IINJ(PIN)
must never be exceeded. Refer to Table 10 for maximum allowed input voltage values.
4. A positive injection is induced by VIN > VDD while a negative injection is induced by VIN < VSS. IINJ(PIN)
must never be exceeded. Refer to Table 10: Voltage characteristics for the maximum allowed input voltage
values.
5. When several inputs are submitted to a current injection, the maximum ΣIINJ(PIN) is the absolute sum of the
positive and negative injected currents (instantaneous values).
52/132
DocID17659 Rev 11
STM32L151x6/8/B, STM32L152x6/8/B
Electrical characteristics
Table 12. Thermal characteristics
Symbol
Ratings
TSTG
Storage temperature range
Value
Unit
–65 to +150
°C
150
°C
Maximum junction temperature
TJ
6.3
Operating conditions
6.3.1
General operating conditions
Table 13. General operating conditions
Symbol
Parameter
Conditions
Min
Max
Unit
fHCLK
Internal AHB clock frequency
-
0
32
fPCLK1
Internal APB1 clock frequency
-
0
32
fPCLK2
Internal APB2 clock frequency
-
0
32
BOR detector disabled
1.65
3.6
BOR detector enabled,
at power on
1.8
3.6
BOR detector disabled, after
power on
1.65
3.6
1.65
3.6
1.8
3.6
–0.3
–0.3
0
–0.3
5.5
5.25
5.5
VDD+0.3
V
-
339
mW
–40
85
Low power dissipation
–40
105
-40 °C ≤TA ≤105°C
–40
105
VDD
(1)
VDDA
Standard operating voltage
Analog operating voltage
(ADC and DAC not used)
Analog operating voltage
(ADC or DAC used)
Input voltage on FT pins(3)
VIN
Must be the same voltage as
VDD(2)
2.0 V ≤VDD ≤ 3.6 V
1.65 V ≤ VDD ≤ 2.0 V
Input voltage on BOOT0 pin
Input voltage on any other pin
PD
Power dissipation at
TA = 85 °C(4)
TA
Temperature range
TJ
Junction temperature range
BGA100 package
Maximum power dissipation
(5)
MHz
V
V
°C
°C
1. When the ADC is used, refer to Table 54: ADC characteristics.
2. It is recommended to power VDD and VDDA from the same source. A maximum difference of 300 mV between VDD and
VDDA can be tolerated during power-up and operation.
3. To sustain a voltage higher than VDD+0.3 V, the internal pull-up/pull-down resistors must be disabled.
4. If TA is lower, higher PD values are allowed as long as TJ does not exceed TJ max (see Table 12: Thermal characteristics
on page 53).
5. In low power dissipation state, TA can be extended to this range as long as TJ does not exceed TJ max (see Table 12:
Thermal characteristics on page 53).
DocID17659 Rev 11
53/132
105
Electrical characteristics
6.3.2
STM32L151x6/8/B, STM32L152x6/8/B
Embedded reset and power control block characteristics
The parameters given in the following table are derived from the tests performed under the
ambient temperature condition summarized in the following table.
Table 14. Embedded reset and power control block characteristics
Symbol
Parameter
VDD rise time rate
tVDD(1)
VDD fall time rate
TRSTTEMPO(1) Reset temporization
VPOR/PDR
Power on/power down reset
threshold
VBOR0
Brown-out reset threshold 0
VBOR1
Brown-out reset threshold 1
VBOR2
Brown-out reset threshold 2
VBOR3
Brown-out reset threshold 3
VBOR4
Brown-out reset threshold 4
54/132
Conditions
Min
Typ
Max
BOR detector enabled
0
-
∞
BOR detector disabled
0
-
1000
BOR detector enabled
20
-
∞
BOR detector disabled
0
-
1000
VDD rising, BOR enabled
-
2
3.3
0.4
0.7
1.6
Falling edge
1
1.5
1.65
Rising edge
1.3
1.5
1.65
Falling edge
1.67
1.7
1.74
Rising edge
1.69
1.76
1.8
Falling edge
1.87
1.93
1.97
Rising edge
1.96
2.03
2.07
Falling edge
2.22
2.30
2.35
Rising edge
2.31
2.41
2.44
Falling edge
2.45
2.55
2.60
Rising edge
2.54
2.66
2.7
Falling edge
2.68
2.8
2.85
Rising edge
2.78
2.9
2.95
VDD rising, BOR
DocID17659 Rev 11
disabled(2)
Unit
µs/V
ms
V
V
STM32L151x6/8/B, STM32L152x6/8/B
Electrical characteristics
Table 14. Embedded reset and power control block characteristics (continued)
Symbol
Parameter
Conditions
VPVD0
Programmable voltage detector
threshold 0
VPVD1
PVD threshold 1
VPVD2
PVD threshold 2
VPVD3
PVD threshold 3
VPVD4
PVD threshold 4
VPVD5
PVD threshold 5
VPVD6
PVD threshold 6
Vhyst
Hysteresis voltage
Min
Typ
Max
Falling edge
1.8
1.85
1.88
Rising edge
1.88
1.94
1.99
Falling edge
1.98
2.04
2.09
Rising edge
2.08
2.14
2.18
Falling edge
2.20
2.24
2.28
Rising edge
2.28
2.34
2.38
Falling edge
2.39
2.44
2.48
Rising edge
2.47
2.54
2.58
Falling edge
2.57
2.64
2.69
Rising edge
2.68
2.74
2.79
Falling edge
2.77
2.83
2.88
Rising edge
2.87
2.94
2.99
Falling edge
2.97
3.05
3.09
Rising edge
3.08
3.15
3.20
BOR0 threshold
-
40
-
All BOR and PVD thresholds
excepting BOR0
-
100
-
Unit
V
mV
1. Guaranteed by characterization, not tested in production.
2. Valid for device version without BOR at power up. Please see option "T" in Ordering information scheme for more details.
DocID17659 Rev 11
55/132
105
Electrical characteristics
6.3.3
STM32L151x6/8/B, STM32L152x6/8/B
Embedded internal reference voltage
The parameters given in the following table are based on characterization results, unless
otherwise specified.
Table 15. Embedded internal reference voltage calibration values
Calibration value name
Description
Memory address
Raw data acquired at
0x1FF8 0078-0x1FF8 0079
temperature of 30 °C, VDDA= 3 V
VREFINT_CAL
Table 16. Embedded internal reference voltage
Symbol
Parameter
VREFINT out(1)
Conditions
Internal reference voltage
Min
Typ
Max
– 40 °C < TJ < +105 °C 1.202 1.224 1.242
Unit
V
Internal reference current consumption
-
-
1.4
2.3
µA
Internal reference startup time
-
-
2
3
ms
VVREF_MEAS
VDDA and VREF+voltage during VREFINT
factory measure
-
2.99
3
3.01
V
AVREF_MEAS
Accuracy of factory-measured VREF
value (2)
Including uncertainties
due to ADC and
VDDA/VREF+ values
-
-
±5
mV
–40 °C < TJ < +105 °C
-
20
50
0 °C < TJ < +50 °C
-
-
20
IREFINT
TVREFINT
TCoeff(3)
Temperature coefficient
ACoeff(3)
Long-term stability
1000 hours, T= 25 °C
-
-
1000
ppm
Voltage coefficient
3.0 V < VDDA < 3.6 V
-
-
2000
ppm/V
VDDCoeff
(3)
ppm/°C
TS_vrefint(3)(4)
ADC sampling time when reading the
internal reference voltage
-
5
10
-
µs
TADC_BUF(3)
Startup time of reference voltage buffer
for ADC
-
-
-
10
µs
IBUF_ADC(3)
Consumption of reference voltage
buffer for ADC
-
-
13.5
25
µA
IVREF_OUT(3)
VREF_OUT output current(5)
-
-
-
1
µA
CVREF_OUT(3)
VREF_OUT output load
-
-
-
50
pF
Consumption of reference voltage
buffer for VREF_OUT and COMP
-
-
730
1200
nA
-
24
25
26
ILPBUF(3)
VREFINT_DIV1(3) 1/4 reference voltage
VREFINT_DIV2
(3)
1/2 reference voltage
-
49
50
51
VREFINT_DIV3
(3)
3/4 reference voltage
-
74
75
76
1. Tested in production.
2. The internal VREF value is individually measured in production and stored in dedicated EEPROM bytes.
3. Guaranteed by design, not tested in production.
4. Shortest sampling time can be determined in the application by multiple iterations.
5. To guarantee less than 1% VREF_OUT deviation.
56/132
DocID17659 Rev 11
% VREFINT
STM32L151x6/8/B, STM32L152x6/8/B
6.3.4
Electrical characteristics
Supply current characteristics
The current consumption is a function of several parameters and factors such as the
operating voltage, ambient temperature, I/O pin loading, device software configuration,
operating frequencies, I/O pin switching rate, program location in memory and executed
binary code. The current consumption is measured as described in Figure 14: Current
consumption measurement scheme.
All Run-mode current consumption measurements given in this section are performed with a
reduced code that gives a consumption equivalent to Dhrystone 2.1 code.
The current consumption values are derived from the tests performed under ambient
temperature TA=25°C and VDD supply voltage conditions summarized in Table 13: General
operating conditions, unless otherwise specified. The MCU is placed under the following
conditions:
The MCU is placed under the following conditions:
•
VDD = 3.6 V
•
All I/O pins are configured in analog input mode.
•
All peripherals are disabled except when explicitly mentioned
•
The Flash memory access time, 64-bit access and prefetch is adjusted depending on
fHCLK frequency and voltage range to provide the best CPU performance.
•
When the peripherals are enabled fAPB1 = fAPB2 = fAHB
•
When PLL is ON, the PLL inputs are equal to HSI = 16 MHz (if internal clock is used) or
HSE = 16 MHz (if HSE bypass mode is used).
•
The HSE user clock applied to OSC_IN input follows the characteristics specified in
Table 26: High-speed external user clock characteristics.
DocID17659 Rev 11
57/132
105
Electrical characteristics
STM32L151x6/8/B, STM32L152x6/8/B
Table 17. Current consumption in Run mode, code with data processing running from Flash
Max(1)
Symbol Parameter
Conditions
Range 3,
VCORE=1.2 V
VOS[1:0] = 11
IDD (Run
from
Flash)
Supply
current in
Run mode,
code
executed
from Flash
fHSE = fHCLK
up to 16 MHz,
included
fHSE = fHCLK/2
above 16 MHz
(PLL ON)(2)
HSI clock source
(16 MHz)
MSI clock, 65 kHz
MSI clock, 524 kHz
MSI clock, 4.2 MHz
Range 2,
VCORE=1.5 V
VOS[1:0] = 10
fHCLK
Typ
1 MHz
270
400
400
400
2 MHz
470
600
600
600
4 MHz
890
1025
1025
1025
4 MHz
1
1.3
1.3
1.3
8 MHz
2
2.5
2.5
2.5
16 MHz
3.9
5
5
5
Range 1,
VCORE=1.8 V
VOS[1:0] = 01
8 MHz
2.16
3
3
3
16 MHz
4.8
5.5
5.5
5.5
32 MHz
9.6
11
11
11
Range 2,
VCORE=1.5 V
VOS[1:0] = 10
16 MHz
4
5
5
5
Range 1,
VCORE=1.8 V
VOS[1:0] = 01
32 MHz
9.4
11
11
11
65 kHz
0.05
0.085
0.09
0.1
524 kHz
0.15
0.185
0.19
0.2
4.2 MHz
0.9
1
1
1
Range 3,
VCORE=1.2 V
VOS[1:0] = 11
1. Based on characterization, not tested in production, unless otherwise specified.
2. Oscillator bypassed (HSEBYP = 1 in RCC_CR register).
58/132
Unit
55 °C 85 °C 105 °C
DocID17659 Rev 11
µA
mA
STM32L151x6/8/B, STM32L152x6/8/B
Electrical characteristics
Table 18. Current consumption in Run mode, code with data processing running from RAM
Max(1)
Symbol
Parameter
Conditions
fHCLK
Typ
1 MHz
200
300
300
300
2 MHz
380
500
500
500
4 MHz
720
860
860
860(3)
4 MHz
0.9
1
1
1
8 MHz
1.65
2
2
2
16 MHz
3.2
3.7
3.7
3.7
8 MHz
2
2.5
2.5
2.5
16 MHz
4
4.5
4.5
4.5
32 MHz
7.7
8.5
8.5
8.5
Range 2,
VCORE=1.5 V
VOS[1:0] = 10
16 MHz
3.3
3.8
3.8
3.8
Range 1,
VCORE=1.8 V
VOS[1:0] = 01
32 MHz
7.8
9.2
9.2
9.2
65 kHz
40
60
60
80
524 kHz
110
140
140
160
4.2 MHz
700
800
800
820
Range 3,
VCORE=1.2 V
VOS[1:0] = 11
Supply current
in Run mode,
IDD (Run
code executed
from
from RAM,
RAM)
Flash switched
off
fHSE = fHCLK
up to 16 MHz,
included
fHSE = fHCLK/2
above 16 MHz
(PLL ON)(2)
Range 2,
VCORE=1.5 V
VOS[1:0] = 10
Range 1,
VCORE=1.8 V
VOS[1:0] = 01
HSI clock source
(16 MHz)
MSI clock, 65 kHz
Range 3,
MSI clock, 524 kHz VCORE=1.2 V
VOS[1:0] = 11
MSI clock, 4.2 MHz
Unit
55 °C 85 °C 105 °C
µA
mA
µA
1. Based on characterization, not tested in production, unless otherwise specified.
2. Oscillator bypassed (HSEBYP = 1 in RCC_CR register).
3. Tested in production.
DocID17659 Rev 11
59/132
105
Electrical characteristics
STM32L151x6/8/B, STM32L152x6/8/B
Table 19. Current consumption in Sleep mode
Max(1)
Symbol Parameter
Conditions
fHCLK
Typ
1 MHz
80
140
140
140
2 MHz
150
210
210
210
4 MHz
280
330
330
330(3)
4 MHz
280
400
400
400
8 MHz
450
550
550
550
16 MHz
900
1050
1050
1050
8 MHz
550
Range 3,
VCORE=1.2 V
VOS[1:0] = 11
fHSE = fHCLK up to
Range 2,
16 MHz included,
VCORE=1.5 V
fHSE = fHCLK/2
above 16 MHz (PLL VOS[1:0] = 10
ON)(2)
Supply
current in
Sleep
mode,
code
executed
from RAM,
Flash
switched
HSI clock source
OFF
(16 MHz)
Range 1,
VCORE=1.8 V
VOS[1:0] = 01
650
650
650
16 MHz 1050 1200
1200
1200
32 MHz 2300 2500
2500
2500
Range 2,
VCORE=1.5 V
VOS[1:0] = 10
16 MHz 1000 1100
1100
1100
Range 1,
VCORE=1.8 V
VOS[1:0] = 01
32 MHz 2300 2500
2500
2500
MSI clock, 65 kHz
Range 3,
MSI clock, 524 kHz VCORE=1.2 V
VOS[1:0] = 11
MSI clock, 4.2 MHz
IDD
(Sleep)
65 kHz
30
50
50
60
524 kHz
50
70
70
80
4.2 MHz
200
240
240
250
1 MHz
80
140
140
140
2 MHz
150
210
210
210
4 MHz
290
350
350
350
4 MHz
300
400
400
400
8 MHz
500
600
600
600
16 MHz 1000 1100
1100
1100
8 MHz
Range 3,
VCORE=1.2 V
VOS[1:0] = 11
Supply
current in
Sleep
mode,
code
executed
from Flash
fHSE = fHCLK up to
16 MHz included,
Range 2,
fHSE = fHCLK/2
VCORE=1.5 V
above 16 MHz (PLL VOS[1:0] = 10
ON)(2)
HSI clock source
(16 MHz)
60/132
Unit
55 °C 85 °C 105 °C
Range 1,
VCORE=1.8 V
VOS[1:0] = 01
650
650
650
16 MHz 1050 1200
1200
1200
32 MHz 2300 2500
2500
2500
Range 2,
VCORE=1.5 V
VOS[1:0] = 10
16 MHz 1000 1100
1100
1100
Range 1,
VCORE=1.8 V
VOS[1:0] = 01
32 MHz 2300 2500
2500
2500
DocID17659 Rev 11
550
µA
µA
STM32L151x6/8/B, STM32L152x6/8/B
Electrical characteristics
Table 19. Current consumption in Sleep mode (continued)
Max(1)
Symbol Parameter
IDD
(Sleep)
Conditions
Supply
MSI clock, 65 kHz
current in
MSI clock, 524 kHz
Sleep
Range 3,
mode,
VCORE=1.2V
VOS[1:0] = 11
code
MSI clock, 4.2 MHz
executed
from Flash
fHCLK
Typ
Unit
65 kHz
40
70
70
80
524 kHz
60
90
90
100
55 °C 85 °C 105 °C
µA
4.2 MHz
210
250
250
260
1. Based on characterization, not tested in production, unless otherwise specified.
2. Oscillator bypassed (HSEBYP = 1 in RCC_CR register)
3. Tested in production
DocID17659 Rev 11
61/132
105
Electrical characteristics
STM32L151x6/8/B, STM32L152x6/8/B
Table 20. Current consumption in Low power run mode
Symbol
Parameter
Conditions
All
peripherals
OFF, code
executed
from RAM,
Flash
switched
OFF, VDD
from 1.65 V
to 3.6 V
IDD (LP
Run)
Supply
current in
Low power
run mode
MSI clock, 65 kHz
fHCLK = 65 kHz
MSI clock, 131 kHz
fHCLK = 131 kHz
MSI clock, 65 kHz
fHCLK = 32 kHz
All
peripherals
OFF, code
executed
from Flash,
VDD from
1.65 V to
3.6 V
IDD Max
(LP
Run)(2)
MSI clock, 65 kHz
fHCLK = 32 kHz
Max allowed
VDD from
current in
1.65 V to
Low power
3.6 V
run mode
MSI clock, 65 kHz
fHCLK = 65 kHz
MSI clock, 131 kHz
fHCLK = 131 kHz
Typ
TA = -40 °C to 25 °C
Max
(1)
9
12
TA = 85 °C
17.5
24
TA = 105 °C
31
46
TA = -40 °C to 25 °C
14
17
TA = 85 °C
22
29
TA = 105 °C
35
51
TA = -40 °C to 25 °C
37
42
TA = 55 °C
37
42
TA = 85 °C
37
42
TA = 105 °C
48
65
TA = -40 °C to 25 °C
24
32
TA = 85 °C
33
42
TA = 105 °C
48
64
TA = -40 °C to 25 °C
31
40
TA = 85 °C
40
48
TA = 105 °C
54
70
TA = -40 °C to 25 °C
48
58
TA = 55 °C
54
63
TA = 85 °C
56
65
TA = 105 °C
70
90
-
200
-
-
1. Based on characterization, not tested in production, unless otherwise specified.
2. This limitation is related to the consumption of the CPU core and the peripherals that are powered by the regulator.
Consumption of the I/Os is not included in this limitation.
62/132
DocID17659 Rev 11
Unit
µA
STM32L151x6/8/B, STM32L152x6/8/B
Electrical characteristics
Table 21. Current consumption in Low power sleep mode
Symbol
Parameter
Conditions
MSI clock, 65 kHz
fHCLK = 32 kHz
Flash OFF
MSI clock, 65 kHz
fHCLK = 32 kHz
Flash ON
All
peripherals
OFF, VDD
MSI clock, 65 kHz
from 1.65 V f
HCLK = 65 kHz,
to 3.6 V
Flash ON
IDD (LP
Sleep)
Typ
TA = -40 °C to 25 °C
MSI clock, 65 kHz
fHCLK = 32 kHz
TIM9 and
USART1
enabled,
Flash ON,
VDD from
1.65 V to
3.6 V
MSI clock, 65 kHz
fHCLK = 65 kHz
TA = 85 °C
22
27
TA = 105 °C
31
39
TA = -40 °C to 25 °C
18
26
TA = 85 °C
23
28
TA = 105 °C
31
40
22
30
24
32
26
34
34
45
TA = -40 °C to 25 °C 17.5
25
TA = 85 °C
22
27
TA = 105 °C
31
39
TA = -40 °C to 25 °C
18
26
TA = 85 °C
23
28
TA = 105 °C
31
40
TA = -40 °C to 25 °C
22
30
24
32
26
34
34
45
-
200
MSI clock, 131 kHz TA = 55 °C
fHCLK = 131 kHz
TA = 85 °C
-
-
Unit
25
TA = 105 °C
Max
allowed
VDD from
IDD Max
current in
1.65 V to
(LP Sleep) Low power
3.6 V
Sleep
mode
(1)
TA = -40 °C to 25 °C 17.5
TA = -40 °C to 25 °C
MSI clock, 131 kHz T = 55 °C
A
fHCLK = 131 kHz,
T
A = 85 °C
Flash ON
TA = 105 °C
Supply
current in
Low power
sleep
mode
4.4
Max
µA
1. Based on characterization, not tested in production, unless otherwise specified.
DocID17659 Rev 11
63/132
105
Electrical characteristics
STM32L151x6/8/B, STM32L152x6/8/B
Table 22. Typical and maximum current consumptions in Stop mode
Symbol
Parameter
Typ
Max
TA = -40°C to 25°C
VDD = 1.8 V
1.2
2.75
TA = -40°C to 25°C
1.4
4
TA = 55°C
2.6
6
TA= 85°C
4.8
10
TA = 105°C
10.2
23
TA = -40°C to 25°C
3.3
6
4.5
8
6.6
12
TA = 105°C
13.6
27
TA = -40°C to 25°C
7.7
10
8.6
12
10.7
16
TA = 105°C
19.8
40
TA = -40°C to 25°C
1.6
4
TA = 55°C
2.7
6
TA= 85°C
4.8
10
TA = 105°C
10.3
23
TA = -40°C to 25°C
3.6
6
TA = 55°C
4.6
8
TA= 85°C
6.7
12
TA = 105°C
10.9
23
TA = -40°C to 25°C
7.6
10
8.6
12
10.7
16
19.8
40
Conditions
LCD
OFF
RTC clocked by LSI,
regulator in LP mode,
HSI and HSE OFF
(no independent
watchdog)
(1)
LCD ON T = 55°C
A
(static
duty)(3) TA= 85°C
LCD ON T = 55°C
A
(1/8
duty)(4) TA= 85°C
Supply current
IDD (Stop in Stop mode
with RTC) with RTC
enabled
LCD
OFF
RTC clocked by LSE
external clock (32.768
LCD ON
kHz), regulator in LP
(static
mode, HSI and HSE
duty)(3)
OFF (no independent
watchdog)
LCD ON T = 55°C
A
(1/8
duty)(4) TA= 85°C
TA = 105°C
RTC clocked by LSE
(no independent
watchdog)(5)
64/132
LCD
OFF
DocID17659 Rev 11
(1)(2)
TA = -40°C to 25°C
1.45
VDD = 1.8 V
-
TA = -40°C to 25°C
VDD = 3.0 V
1.9
-
TA = -40°C to 25°C
VDD = 3.6 V
2.2
-
Unit
µA
STM32L151x6/8/B, STM32L152x6/8/B
Electrical characteristics
Table 22. Typical and maximum current consumptions in Stop mode (continued)
Symbol
Parameter
Typ
Max
TA = -40°C to 25°C
1.1
2.2
TA = -40°C to 25°C
0.5
0.9
TA = 55°C
1.9
5
TA= 85°C
3.7
8
TA = 105°C
8.9
20(6)
2
-
1.45
-
Conditions
Regulator in LP mode, HSI and
HSE OFF, independent
watchdog and LSI enabled
Supply current
in Stop mode
IDD (Stop)
(RTC
Regulator in LP mode, LSI, HSI
disabled)
and HSE OFF (no independent
watchdog)
RMS (root
MSI = 4.2 MHz
mean square)
MSI = 1.05 MHz
supply current
IDD (WU
during wakeup
from Stop) time when
MSI = 65 kHz(7)
exiting from
Stop mode
(1)
VDD = 3.0 V
TA = -40°C to 25°C
Unit
(1)(2)
µA
mA
1.45
-
1. The typical values are given for VDD = 3.0 V and max values are given for VDD = 3.6 V, unless otherwise
specified.
2. Based on characterization, not tested in production, unless otherwise specified
3. LCD enabled with external VLCD, static duty, division ratio = 256, all pixels active, no LCD connected
4. LCD enabled with external VLCD, 1/8 duty, 1/3 bias, division ratio = 64, all pixels active, no LCD
connected.
5. Based on characterization done with a 32.768 kHz crystal (MC306-G-06Q-32.768, manufacturer JFVNY)
with two 6.8pF loading capacitors.
6. Tested in production
7. When MSI = 64 kHz, the RMS current is measured over the first 15 µs following the wakeup event. For the
remaining time of the wakeup period, the current is similar to the Run mode current.
DocID17659 Rev 11
65/132
105
Electrical characteristics
STM32L151x6/8/B, STM32L152x6/8/B
Table 23. Typical and maximum current consumptions in Standby mode
Symbol
Parameter
RTC clocked by LSI (no
independent watchdog)
IDD
(Standby
with RTC)
Supply current in Standby
mode with RTC enabled
RTC clocked by LSE (no
independent watchdog)(3)
Independent watchdog
and LSI enabled
IDD
(Standby)
Supply current in Standby
mode with RTC disabled
Independent watchdog
and LSI OFF
(1)(2)
TA = -40 °C to 25 °C
VDD = 1.8 V
0.9
-
TA = -40 °C to 25 °C
1.1
1.8
TA = 55 °C
1.42
2.5
TA= 85 °C
1.87
3
TA = 105 °C
2.78
5
TA = -40 °C to 25 °C
VDD = 1.8 V
1
-
TA = -40 °C to 25 °C
1.33
2.9
TA = 55 °C
1.59
3.4
TA= 85 °C
2.01
4.3
TA = 105 °C
3.27
6.3
TA = -40 °C to 25 °C
1.1
1.6
TA = -40 °C to 25 °C
0.3
0.55
TA = 55 °C
0.5
0.8
TA = 85 °C
1
1.7
2.5
4(4)
1
-
TA = 105 °C
IDD (WU
from
Standby)
RMS supply current during
wakeup time when exiting
from Standby mode
-
Max
Typ(1)
Conditions
VDD = 3.0 V
TA = -40 °C to 25 °C
Unit
µA
1. The typical values are given for VDD = 3.0 V and max values are given for VDD = 3.6 V, unless otherwise specified.
2. Based on characterization, not tested in production, unless otherwise specified.
3. Based on characterization done with a 32.768 kHz crystal (MC306-G-06Q-32.768, manufacturer JFVNY) with two 6.8pF
loading capacitors.
4. Tested in production.
On-chip peripheral current consumption
The current consumption of the on-chip peripherals is given in the following table. The MCU
is placed under the following conditions:
66/132
•
all I/O pins are in input mode with a static value at VDD or VSS (no load)
•
all peripherals are disabled unless otherwise mentioned
•
the given value is calculated by measuring the current consumption
–
with all peripherals clocked off
–
with only one peripheral clocked on
DocID17659 Rev 11
STM32L151x6/8/B, STM32L152x6/8/B
Electrical characteristics
Table 24. Peripheral current consumption(1)
Typical consumption, VDD = 3.0 V, TA = 25 °C
Peripheral
TIM2
13
10.5
8
10.5
TIM3
14
12
9
12
TIM4
12.5
10.5
8
11
TIM6
5.5
4.5
3.5
4.5
TIM7
5.5
5
3.5
4.5
LCD
5.5
5
3.5
5
4
3.5
2.5
3.5
5.5
5
4
5
USART2
9
8
5.5
8.5
USART3
10.5
9
6
8
I2C1
8.5
7
5.5
7.5
I2C2
8.5
7
5.5
6.5
USB
12.5
10
6.5
10
PWR
4.5
4
3
3.5
DAC
9
7.5
6
7
4.5
4
3.5
4.5
SYSCFG & RI
3
2.5
2
2.5
TIM9
9
7.5
6
7
TIM10
6.5
5.5
4.5
5.5
TIM11
7
6
4.5
5.5
ADC(2)
11.5
9.5
8
9
SPI1
5
4.5
3
4
USART1
9
7.5
6
7.5
WWDG
APB1
SPI2
COMP
APB2
Range 2,
Range 3,
Range 1,
Low power
VCORE=1.8 V VCORE=1.5 V VCORE=1.2 V
sleep and run
VOS[1:0] = 01 VOS[1:0] = 10 VOS[1:0] = 11
DocID17659 Rev 11
Unit
µA/MHz
(fHCLK)
µA/MHz
(fHCLK)
67/132
105
Electrical characteristics
STM32L151x6/8/B, STM32L152x6/8/B
Table 24. Peripheral current consumption(1) (continued)
Typical consumption, VDD = 3.0 V, TA = 25 °C
Peripheral
AHB
Range 2,
Range 3,
Range 1,
Low power
VCORE=1.8 V VCORE=1.5 V VCORE=1.2 V
sleep and run
VOS[1:0] = 01 VOS[1:0] = 10 VOS[1:0] = 11
GPIOA
5
4.5
3.5
4
GPIOB
5
4.5
3.5
4.5
GPIOC
5
4.5
3.5
4.5
GPIOD
5
4.5
3.5
4.5
GPIOE
5
4.5
3.5
4.5
GPIOH
4
4
3
3.5
CRC
1
0.5
0.5
0.5
FLASH
13
11.5
9
18.5
DMA1
12
10
8
10.5
166
138
106
130
All enabled
IDD (RTC)
0.47
IDD (LCD)
3.1
IDD (ADC)(3)
340
IDD (COMP1)
0.16
IDD (COMP2)
µA/MHz
(fHCLK)
1450
(4)
IDD (DAC)
Unit
Slow mode
2
Fast mode
5
IDD (PVD / BOR)(5)
2.6
IDD (IWDG)
0.25
µA
1. Data based on differential IDD measurement between all peripherals OFF an one peripheral with clock enabled, in the
following conditions: fHCLK = 32 MHz (Range 1), fHCLK = 16 MHz (Range 2), fHCLK = 4 MHz (Range 3), fHCLK = 64kHz
(Low power run/sleep), fAPB1 = fHCLK, fAPB2 = fHCLK, default prescaler value for each peripheral. The CPU is in Sleep
mode in both cases. No I/O pins toggling. Not tested in production.
2. HSI oscillator is OFF for this measure.
3. Data based on a differential IDD measurement between ADC in reset configuration and continuous ADC conversion (HSI
consumption not included).
4. Data based on a differential IDD measurement between DAC in reset configuration and continuous DAC conversion of
VDD/2. DAC is in buffered mode, output is left floating.
5. Including supply current of internal reference voltage.
68/132
DocID17659 Rev 11
STM32L151x6/8/B, STM32L152x6/8/B
6.3.5
Electrical characteristics
Wakeup time from Low power mode
The wakeup times given in the following table are measured with the MSI RC oscillator. The
clock source used to wake up the device depends on the current operating mode:
•
Sleep mode: the clock source is the clock that was set before entering Sleep mode
•
Stop mode: the clock source is the MSI oscillator in the range configured before
entering Stop mode
•
Standby mode: the clock source is the MSI oscillator running at 2.1 MHz
All timings are derived from tests performed under ambient temperature and VDD supply
voltage conditions summarized in Table 13.
Table 25. Low-power mode wakeup timings
Symbol
Parameter
tWUSLEEP
Wakeup from Sleep mode
tWUSLEEP_LP
Wakeup from Low power
sleep mode
fHCLK = 262 kHz
tWUSTDBY
Typ
Max(1) Unit
fHCLK = 32 MHz
0.36
-
fHCLK = 262 kHz
Flash enabled
32
-
fHCLK = 262 kHz
Flash switched OFF
34
-
fHCLK = fMSI = 4.2 MHz
8.2
-
fHCLK = fMSI = 4.2 MHz
Voltage Range 1 and 2
8.2
9.3
fHCLK = fMSI = 4.2 MHz
Voltage Range 3
7.8
11.2
fHCLK = fMSI = 2.1 MHz
10
12
fHCLK = fMSI = 1.05 MHz
15.5
20
fHCLK = fMSI = 524 kHz
29
35
fHCLK = fMSI = 262 kHz
53
63
fHCLK = fMSI = 131 kHz
105
118
fHCLK = MSI = 65 kHz
210
237
Wakeup from Standby
mode
FWU bit = 1
fHCLK = MSI = 2.1 MHz
50
103
Wakeup from Standby
mode
FWU bit = 0
fHCLK = MSI = 2.1 MHz
2.5
3.2
Wakeup from Stop mode,
regulator in Run mode
tWUSTOP
Conditions
Wakeup from Stop mode,
regulator in low power
mode
µs
ms
1. Based on characterization, not tested in production, unless otherwise specified
DocID17659 Rev 11
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105
Electrical characteristics
6.3.6
STM32L151x6/8/B, STM32L152x6/8/B
External clock source characteristics
High-speed external user clock generated from an external source
In bypass mode the HSE oscillator is switched off and the input pin is a standard GPIO. The
external clock signal has to respect the I/O characteristics in Section 6.3.13. However, the
recommended clock input waveform is shown in Figure 15: High-speed external clock
source AC timing diagram.
Table 26. High-speed external user clock characteristics(1)
Symbol
fHSE_ext
Parameter
User external clock source
frequency
Conditions
Min
CSS is on or
PLL is used
1
CSS is off, PLL
not used
0
Typ
Max
Unit
8
32
MHz
VHSEH
OSC_IN input pin high level voltage
0.7VDD
-
VDD
VHSEL
OSC_IN input pin low level voltage
VSS
-
0.3VDD
12
-
-
-
-
20
-
-
2.6
-
pF
-
45
-
55
%
VSS ≤VIN ≤VDD
-
-
±1
µA
tw(HSEH)
tw(HSEL)
OSC_IN high or low time
tr(HSE)
tf(HSE)
OSC_IN rise or fall time
Cin(HSE)
-
ns
OSC_IN input capacitance
DuCy(HSE) Duty cycle
IL
V
OSC_IN Input leakage current
1. Guaranteed by design, not tested in production.
Figure 15. High-speed external clock source AC timing diagram
WZ+6(+
9+6(+
9+6(/
WU+6(
WI+6(
WZ+6(/
W
7+6(
069
70/132
DocID17659 Rev 11
STM32L151x6/8/B, STM32L152x6/8/B
Electrical characteristics
Low-speed external user clock generated from an external source
The characteristics given in the following table result from tests performed using a lowspeed external clock source, and under ambient temperature and supply voltage conditions
summarized in Table 13.
Table 27. Low-speed external user clock characteristics(1)
Symbol
Parameter
Conditions
fLSE_ext
User external clock source
frequency
VLSEH
OSC32_IN input pin high level
voltage
VLSEL
OSC32_IN input pin low level
voltage
tw(LSEH)
tw(LSEL)
OSC32_IN high or low time
tr(LSE)
tf(LSE)
OSC32_IN rise or fall time
CIN(LSE)
Typ
Max
Unit
1
32.768
1000
kHz
0.7VDD
-
VDD
V
-
VSS
-
0.3VDD
465
-
ns
-
-
10
-
-
0.6
-
pF
-
45
-
55
%
VSS ≤VIN ≤VDD
-
-
±1
µA
OSC32_IN input capacitance
DuCy(LSE) Duty cycle
IL
Min
OSC32_IN Input leakage current
1. Guaranteed by design, not tested in production
Figure 16. Low-speed external clock source AC timing diagram
WZ/6(+
9/6(+
9/6(/
WU/6(
WI/6(
W
WZ/6(/
7/6(
069
High-speed external clock generated from a crystal/ceramic resonator
The high-speed external (HSE) clock can be supplied with a 1 to 24 MHz crystal/ceramic
resonator oscillator. All the information given in this paragraph are based on
characterization results obtained with typical external components specified in Table 28. In
the application, the resonator and the load capacitors have to be placed as close as
possible to the oscillator pins in order to minimize output distortion and startup stabilization
time. Refer to the crystal resonator manufacturer for more details on the resonator
characteristics (frequency, package, accuracy).
DocID17659 Rev 11
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105
Electrical characteristics
STM32L151x6/8/B, STM32L152x6/8/B
Table 28. HSE oscillator characteristics(1)(2)
Symbol
Parameter
Conditions
fOSC_IN Oscillator frequency
-
RF
Feedback resistor
C
Recommended load
capacitance versus
equivalent serial resistance
of the crystal (RS)(3)
IHSE
IDD(HSE)
gm
tSU(HSE)
(4)
HSE oscillator power
consumption
Oscillator transconductance
Max
Unit
24
MHz
200
-
kΩ
1
-
HSE driving current
Startup time
Min Typ
RS = 30 Ω
-
20
-
pF
VDD= 3.3 V, VIN = VSS
with 30 pF load
-
-
3
mA
C = 20 pF
fOSC = 16 MHz
-
-
2.5 (startup)
0.7 (stabilized)
mA
C = 10 pF
fOSC = 16 MHz
-
-
2.5 (startup)
0.46 (stabilized)
Startup
3.5
-
-
mA
/V
VDD is stabilized
-
1
-
ms
1. Resonator characteristics given by the crystal/ceramic resonator manufacturer.
2. Based on characterization results, not tested in production.
3. The relatively low value of the RF resistor offers a good protection against issues resulting from use in a
humid environment, due to the induced leakage and the bias condition change. However, it is
recommended to take this point into account if the MCU is used in tough humidity conditions.
4. tSU(HSE) is the startup time measured from the moment it is enabled (by software) to a stabilized 8 MHz
oscillation is reached. This value is measured for a standard crystal resonator and it can vary significantly
with the crystal manufacturer.
For CL1 and CL2, it is recommended to use high-quality external ceramic capacitors in the
5 pF to 25 pF range (typ.), designed for high-frequency applications, and selected to match
the requirements of the crystal or resonator (see Figure 17). CL1 and CL2 are usually the
same size. The crystal manufacturer typically specifies a load capacitance which is the
series combination of CL1 and CL2. PCB and MCU pin capacitance must be included (10 pF
can be used as a rough estimate of the combined pin and board capacitance) when sizing
CL1 and CL2. Refer to the application note AN2867 “Oscillator design guide for ST
microcontrollers” available from the ST website www.st.com.
72/132
DocID17659 Rev 11
STM32L151x6/8/B, STM32L152x6/8/B
Electrical characteristics
Figure 17. HSE oscillator circuit diagram
F(3%TOCORE
2M
,M
2&
#/
#,
/3#?).
#M
GM
2ESONATOR
#ONSUMPTION
CONTROL
2ESONATOR
34-
/3#?/54
#,
AI
1. REXT value depends on the crystal characteristics.
Low-speed external clock generated from a crystal/ceramic resonator
The low-speed external (LSE) clock can be supplied with a 32.768 kHz crystal/ceramic
resonator oscillator. All the information given in this paragraph are based on
characterization results obtained with typical external components specified in Table 29. In
the application, the resonator and the load capacitors have to be placed as close as
possible to the oscillator pins in order to minimize output distortion and startup stabilization
time. Refer to the crystal resonator manufacturer for more details on the resonator
characteristics (frequency, package, accuracy).
Table 29. LSE oscillator characteristics (fLSE = 32.768 kHz)(1)
Symbol
Parameter
Conditions
Min
Typ
Max
Unit
fLSE
Low speed external oscillator
frequency
-
-
32.768
-
kHz
RF
Feedback resistor
-
-
1.2
-
MΩ
C(2)
Recommended load capacitance
versus equivalent serial
resistance of the crystal (RS)(3)
RS = 30 kΩ
-
8
-
pF
ILSE
LSE driving current
VDD = 3.3 V, VIN = VSS
-
-
1.1
µA
VDD = 1.8 V
-
450
-
VDD = 3.0 V
-
600
-
VDD = 3.6V
-
750
-
-
3
-
-
µA/V
VDD is stabilized
-
1
-
s
IDD (LSE)
Oscillator transconductance
gm
tSU(LSE)
LSE oscillator current
consumption
(4)
Startup time
nA
1. Based on characterization, not tested in production.
2. Refer to the note and caution paragraphs below the table, and to the application note AN2867 “Oscillator
design guide for ST microcontrollers”.
3. The oscillator selection can be optimized in terms of supply current using an high quality resonator with
small RS value for example MSIV-TIN32.768kHz. Refer to crystal manufacturer for more details.
4.
tSU(LSE) is the startup time measured from the moment it is enabled (by software) to a stabilized
32.768 kHz oscillation is reached. This value is measured for a standard crystal resonator and it can vary
significantly with the crystal manufacturer.
DocID17659 Rev 11
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105
Electrical characteristics
STM32L151x6/8/B, STM32L152x6/8/B
Note:
For CL1 and CL2, it is recommended to use high-quality ceramic capacitors in the 5 pF to
15 pF range selected to match the requirements of the crystal or resonator (see Figure 18 ).
CL1 and CL2, are usually the same size. The crystal manufacturer typically specifies a load
capacitance which is the series combination of CL1 and CL2.
Load capacitance CL has the following formula: CL = CL1 x CL2 / (CL1 + CL2) + Cstray
where Cstray is the pin capacitance and board or trace PCB-related capacitance. Typically,
it is between 2 pF and 7 pF.
Caution:
To avoid exceeding the maximum value of CL1 and CL2 (15 pF) it is strongly recommended
to use a resonator with a load capacitance CL ≤ 7 pF. Never use a resonator with a load
capacitance of 12.5 pF.
Example: if a resonator is chosen with a load capacitance of CL = 6 pF and Cstray = 2 pF,
then CL1 = CL2 = 8 pF.
Figure 18. Typical application with a 32.768 kHz crystal
2ESONATORWITH
INTEGRATEDCAPACITORS
#,
F,3%
/3#?).
K( Z
RESONATOR
#,
2&
/3#?/5 4
"IAS
CONTROLLED
GAIN
34-,XX
AI
74/132
DocID17659 Rev 11
STM32L151x6/8/B, STM32L152x6/8/B
6.3.7
Electrical characteristics
Internal clock source characteristics
The parameters given in the following table are derived from tests performed under ambient
temperature and VDD supply voltage conditions summarized in Table 13.
High-speed internal (HSI) RC oscillator
Table 30. HSI oscillator characteristics
Symbol
fHSI
TRIM
(1)(2)
Parameter
Conditions
Min
Typ
Max
Unit
Frequency
VDD = 3.0 V
-
16
-
MHz
HSI user-trimmed
resolution
Trimming code is not a multiple of 16
-
± 0.4
0.7
%
Trimming code is a multiple of 16
-
Accuracy of the
ACCHSI(2) factory-calibrated
HSI oscillator
-
± 1.5
%
VDDA = 3.0 V, TA = 25 °C
-1(3)
-
1(3)
%
VDDA = 3.0 V, TA = 0 to 55 °C
-1.5
-
1.5
%
VDDA = 3.0 V, TA = -10 to 70 °C
-2
-
2
%
VDDA = 3.0 V, TA = -10 to 85 °C
-2.5
-
2
%
VDDA = 3.0 V, TA = -10 to 105 °C
-4
-
2
%
VDDA = 1.65 V to 3.6 V
TA = -40 to 105 °C
-4
-
3
%
tSU(HSI)(2)
HSI oscillator
startup time
-
-
3.7
6
µs
IDD(HSI)(2)
HSI oscillator
power consumption
-
-
100
140
µA
1. The trimming step differs depending on the trimming code. It is usually negative on the codes which are
multiples of 16 (0x00, 0x10, 0x20, 0x30...0xE0).
2. Based on characterization, not tested in production.
3. Tested in production.
Low-speed internal (LSI) RC oscillator
Table 31. LSI oscillator characteristics
Symbol
Parameter
Min
Typ
Max
Unit
fLSI(1)
LSI frequency
26
38
56
kHz
DLSI(2)
LSI oscillator frequency drift
0°C ≤TA ≤ 85°C
-10
-
4
%
LSI oscillator startup time
-
-
200
µs
LSI oscillator power consumption
-
400
510
nA
tsu(LSI)(3)
IDD(LSI)
(3)
1. Tested in production.
2. This is a deviation for an individual part, once the initial frequency has been measured.
3. Guaranteed by design, not tested in production.
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105
Electrical characteristics
STM32L151x6/8/B, STM32L152x6/8/B
Multi-speed internal (MSI) RC oscillator
Table 32. MSI oscillator characteristics
Symbol
Condition
Typ
Max
MSI range 0
65.5
-
MSI range 1
131
-
MSI range 2
262
-
MSI range 3
524
-
MSI range 4
1.05
-
MSI range 5
2.1
-
MSI range 6
4.2
-
Frequency error after factory calibration
-
±0.5
-
%
DTEMP(MSI)(1)
MSI oscillator frequency drift
0 °C ≤TA ≤85 °C
-
±3
-
%
DVOLT(MSI)(1)
MSI oscillator frequency drift
1.65 V ≤VDD ≤3.6 V, TA = 25 °C
-
-
2.5
%/V
MSI range 0
0.75
-
MSI range 1
1
-
MSI range 2
1.5
-
MSI range 3
2.5
-
MSI range 4
4.5
-
MSI range 5
8
-
MSI range 6
15
-
MSI range 0
30
-
MSI range 1
20
-
MSI range 2
15
-
MSI range 3
10
-
MSI range 4
6
-
MSI range 5
5
-
MSI range 6,
Voltage range 1
and 2
3.5
-
MSI range 6,
Voltage range 3
5
-
fMSI
ACCMSI
IDD(MSI)(2)
tSU(MSI)
76/132
Parameter
Frequency after factory calibration, done at
VDD= 3.3 V and TA = 25 °C
MSI oscillator power consumption
MSI oscillator startup time
DocID17659 Rev 11
Unit
kHz
MHz
µA
µs
STM32L151x6/8/B, STM32L152x6/8/B
Electrical characteristics
Table 32. MSI oscillator characteristics (continued)
Symbol
tSTAB(MSI)(2)
fOVER(MSI)
Parameter
Condition
MSI oscillator stabilization time
MSI oscillator frequency overshoot
Typ
Max
MSI range 0
-
40
MSI range 1
-
20
MSI range 2
-
10
MSI range 3
-
4
MSI range 4
-
2.5
MSI range 5
-
2
MSI range 6,
Voltage range 1
and 2
-
2
MSI range 3,
Voltage Range 3
-
3
Any range to
range 5
-
4
Any range to
range 6
-
Unit
µs
MHz
6
1. This is a deviation for an individual part, once the initial frequency has been measured.
2. Based on characterization, not tested in production.
6.3.8
PLL characteristics
The parameters given in Table 33 are derived from tests performed under ambient
temperature and VDD supply voltage conditions summarized in Table 13.
Table 33. PLL characteristics
Value
Symbol
Parameter
Unit
Min
Typ
Max(1)
PLL input clock(2)
2
-
24
MHz
PLL input clock duty cycle
45
-
55
%
fPLL_OUT
PLL output clock
2
-
32
MHz
tLOCK
Worst case PLL lock time
PLL input = 2 MHz
PLL VCO = 96 MHz
-
100
130
µs
Jitter
Cycle-to-cycle jitter
-
-
± 600
ps
IDDA(PLL)
Current consumption on VDDA
-
220
450
IDD(PLL)
Current consumption on VDD
-
120
150
fPLL_IN
µA
1. Based on characterization, not tested in production.
2. Take care of using the appropriate multiplier factors so as to have PLL input clock values compatible with
the range defined by fPLL_OUT.
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105
Electrical characteristics
6.3.9
STM32L151x6/8/B, STM32L152x6/8/B
Memory characteristics
The characteristics are given at TA = -40 to 105 °C unless otherwise specified.
RAM memory
Table 34. RAM and hardware registers
Symbol
VRM
Parameter
Data retention
Conditions
mode(1)
STOP mode (or RESET)
Min
Typ
Max
Unit
1.65
-
-
V
1. Minimum supply voltage without losing data stored in RAM (in Stop mode or under Reset) or in hardware
registers (only in Stop mode).
Flash memory and data EEPROM
Table 35. Flash memory and data EEPROM characteristics
Symbol
VDD
Operating voltage
Read / Write / Erase
tprog
Programming / erasing
time for byte / word /
double word / half-page
IDD
Conditions
Min
Typ
Max(1)
Unit
-
1.65
-
3.6
V
Erasing
-
3.28
3.94
Programming
-
3.28
3.94
-
300
-
µA
-
1.5
2.5
mA
Parameter
Average current during
whole program/erase
operation
Maximum current (peak)
during program/erase
operation
TA = 25 °C, VDD = 3.6 V
1. Guaranteed by design, not tested in production.
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DocID17659 Rev 11
STM32L151x6/8/B, STM32L152x6/8/B
Electrical characteristics
Table 36. Flash memory, data EEPROM endurance and data retention
Value
Symbol
(2)
NCYC
Parameter
Cycling (erase / write)
Program memory
Cycling (erase / write)
EEPROM data memory
Data retention (program memory) after
10 kcycles at TA = 85 °C
tRET
(2)
Data retention (EEPROM data memory)
after 300 kcycles at TA = 85 °C
Data retention (program memory) after
10 kcycles at TA = 105 °C
Data retention (EEPROM data memory)
after 300 kcycles at TA = 105 °C
Conditions
TA = -40°C to
105 °C
Min(1) Typ Max
10
-
-
300
-
-
30
-
-
30
-
-
10
-
-
10
-
-
Unit
kcycles
TRET = +85 °C
years
TRET = +105 °C
1. Based on characterization not tested in production.
2. Characterization is done according to JEDEC JESD22-A117.
6.3.10
EMC characteristics
Susceptibility tests are performed on a sample basis during device characterization.
Functional EMS (electromagnetic susceptibility)
While a simple application is executed on the device (toggling 2 LEDs through I/O ports).
the device is stressed by two electromagnetic events until a failure occurs. The failure is
indicated by the LEDs:
•
Electrostatic discharge (ESD) (positive and negative) is applied to all device pins until
a functional disturbance occurs. This test is compliant with the IEC 61000-4-2 standard.
•
FTB: A Burst of Fast Transient voltage (positive and negative) is applied to VDD and
VSS through a 100 pF capacitor, until a functional disturbance occurs. This test is
compliant with the IEC 61000-4-4 standard.
A device reset allows normal operations to be resumed.
The test results are given in Table 37. They are based on the EMS levels and classes
defined in application note AN1709.
Table 37. EMS characteristics
Symbol
Parameter
Conditions
VFESD
VDD = 3.3 V, LQFP100, TA = +25 °C,
Voltage limits to be applied on any I/O pin to
fHCLK = 32 MHz
induce a functional disturbance
conforms to IEC 61000-4-2
VEFTB
Fast transient voltage burst limits to be
applied through 100 pF on VDD and VSS
pins to induce a functional disturbance
DocID17659 Rev 11
VDD = 3.3 V, LQFP100, TA = +25
°C,
fHCLK = 32 MHz
conforms to IEC 61000-4-4
Level/
Class
2B
4A
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105
Electrical characteristics
STM32L151x6/8/B, STM32L152x6/8/B
Designing hardened software to avoid noise problems
EMC characterization and optimization are performed at component level with a typical
application environment and simplified MCU software. It should be noted that good EMC
performance is highly dependent on the user application and the software in particular.
Therefore it is recommended that the user applies EMC software optimization and
prequalification tests in relation with the EMC level requested for his application.
Software recommendations
The software flowchart must include the management of runaway conditions such as:
•
Corrupted program counter
•
Unexpected reset
•
Critical data corruption (control registers...)
Prequalification trials
Most of the common failures (unexpected reset and program counter corruption) can be
reproduced by manually forcing a low state on the NRST pin or the oscillator pins for 1
second.
To complete these trials, ESD stress can be applied directly on the device, over the range of
specification values. When unexpected behavior is detected, the software can be hardened
to prevent unrecoverable errors occurring (see application note AN1015).
Electromagnetic Interference (EMI)
The electromagnetic field emitted by the device are monitored while a simple application is
executed (toggling 2 LEDs through the I/O ports). This emission test is compliant with
IEC 61967-2 standard which specifies the test board and the pin loading.
Table 38. EMI characteristics
Max vs. frequency range
Symbol
SEMI
80/132
Parameter
Peak level
Conditions
VDD = 3.3 V,
TA = 25 °C,
LQFP100 package
compliant with IEC
61967-2
Monitored
frequency band
4 MHz
16 MHz
voltage
Range 3
voltage
Range 2
32 MHz
voltage
Range 1
0.1 to 30 MHz
3
-6
-5
30 to 130 MHz
18
4
-7
130 MHz to 1GHz
15
5
-7
SAE EMI Level
2.5
2
1
DocID17659 Rev 11
Unit
dBµV
-
STM32L151x6/8/B, STM32L152x6/8/B
6.3.11
Electrical characteristics
Electrical sensitivity characteristics
Based on three different tests (ESD, LU) using specific measurement methods, the device is
stressed in order to determine its performance in terms of electrical sensitivity.
Electrostatic discharge (ESD)
Electrostatic discharges (a positive then a negative pulse separated by 1 second) are
applied to the pins of each sample according to each pin combination. The sample size
depends on the number of supply pins in the device (3 parts × (n+1) supply pins). This test
conforms to the JESD22-A114/C101 standard.
Table 39. ESD absolute maximum ratings
Symbol
VESD(HBM)
Ratings
Conditions
Class
Maximum
value(1)
2
2000
Electrostatic discharge
TA = +25 °C, conforming to
voltage (human body model) JESD22-A114
Electrostatic discharge
VESD(CDM) voltage (charge device
model)
TA = +25 °C, conforming to
ANSI/ESD STM5.3.1
Unit
V
II
500
1. Based on characterization results, not tested in production.
Static latch-up
Two complementary static tests are required on six parts to assess the latch-up
performance:
•
A supply overvoltage is applied to each power supply pin
•
A current injection is applied to each input, output and configurable I/O pin
These tests are compliant with EIA/JESD 78A IC latch-up standard.
Table 40. Electrical sensitivities
Symbol
LU
6.3.12
Parameter
Static latch-up class
Conditions
TA = +105 °C conforming to JESD78A
Class
II level A
I/O current injection characteristics
As a general rule, current injection to the I/O pins, due to external voltage below VSS or
above VDD (for standard pins) should be avoided during normal product operation.
However, in order to give an indication of the robustness of the microcontroller in cases
when abnormal injection accidentally happens, susceptibility tests are performed on a
sample basis during device characterization.
DocID17659 Rev 11
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105
Electrical characteristics
STM32L151x6/8/B, STM32L152x6/8/B
Functional susceptibility to I/O current injection
While a simple application is executed on the device, the device is stressed by injecting
current into the I/O pins programmed in floating input mode. While current is injected into
the I/O pin, one at a time, the device is checked for functional failures.
The failure is indicated by an out of range parameter: ADC error, out of spec current
injection on adjacent pins or other functional failure (for example reset, oscillator frequency
deviation, LCD levels, etc.).
The test results are given in Table 41.
Table 41. I/O current injection susceptibility
Functional susceptibility
Symbol
IINJ
Note:
82/132
Description
Negative
injection
Positive
injection
Injected current on all 5 V tolerant (FT) pins
-5
+0
Injected current on any other pin
-5
+5
It is recommended to add a Schottky diode (pin to ground) to analog pins which may
potentially inject negative currents.
DocID17659 Rev 11
Unit
mA
STM32L151x6/8/B, STM32L152x6/8/B
6.3.13
Electrical characteristics
I/O port characteristics
General input/output characteristics
Unless otherwise specified, the parameters given in Table 42 are derived from tests
performed under conditions summarized in Table 13. All I/Os are CMOS and TTL compliant.
Table 42. I/O static characteristics
Symbol
Parameter
VIL
Input low level voltage
VIH
Input high level voltage
Vhys
Ilkg
RPU
Conditions
-
FT I/O
I/O pin capacitance
-
0.7 VDD
-
Max
10%
0.3VDD
-
-
-
-
VDD(3)
V
-
(4)
-
-
VSS ≤VIN ≤VDD
I/Os with LCD
-
-
±50
VSS ≤VIN ≤VDD
I/Os with analog
switches
-
-
±50
VSS ≤VIN ≤VDD
I/Os with analog
switches and LCD
-
-
±50
VSS ≤VIN ≤VDD
I/Os with USB
-
-
TBD
FT I/O
VDD ≤VIN ≤5V
-
-
TBD
VSS ≤VIN ≤VDD
Standard I/Os
-
-
±50
VIN = VSS
30
45
60
kΩ
VIN = VDD
30
45
60
kΩ
-
5
-
pF
(6)
-
-
5% VDD
Unit
(1)
FT I/O
Weak pull-up equivalent resistor(6)(1)
CIO
Typ
-
Standard I/O
Input leakage current (5)
Weak pull-down equivalent resistor
-
Standard I/O
I/O Schmitt trigger voltage
hysteresis(2)
RPD
Min
nA
1. Tested in production
2. Hysteresis voltage between Schmitt trigger switching levels. Based on characterization, not tested in production.
3. With a minimum of 200 mV. Based on characterization, not tested in production.
4. With a minimum of 100 mV. Based on characterization, not tested in production.
5. The max. value may be exceeded if negative current is injected on adjacent pins.
6. Pull-up and pull-down resistors are designed with a true resistance in series with a switchable PMOS/NMOS. This
MOS/NMOS contribution to the series resistance is minimum (~10% order).
DocID17659 Rev 11
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105
Electrical characteristics
STM32L151x6/8/B, STM32L152x6/8/B
Output driving current
The GPIOs (general purpose input/outputs) can sink or source up to ±8 mA, and sink or
source up to ±20 mA (with the non-standard VOL/VOH specifications given in Table 43.
In the user application, the number of I/O pins which can drive current must be limited to
respect the absolute maximum rating specified in Section 6.2:
•
The sum of the currents sourced by all the I/Os on VDD, plus the maximum Run
consumption of the MCU sourced on VDD, cannot exceed the absolute maximum rating
IVDDΣ (see Table 11).
•
The sum of the currents sunk by all the I/Os on VSS plus the maximum Run
consumption of the MCU sunk on VSS cannot exceed the absolute maximum rating
IVSSΣ (see Table 11).
Output voltage levels
Unless otherwise specified, the parameters given in Table 43 are derived from tests
performed under ambient temperature and VDD supply voltage conditions summarized in
Table 13. All I/Os are CMOS and TTL compliant.
Table 43. Output voltage characteristics
Symbol
Parameter
VOL(1)(2)
Output low level voltage for an I/O pin
VOH(3)(2)
Output high level voltage for an I/O pin
VOL
(1)(4)
Output low level voltage for an I/O pin
VOH (3)(4)
Output high level voltage for an I/O pin
VOL(1)(4)
Output low level voltage for an I/O pin
VOH(3)(4)
Output high level voltage for an I/O pin
Conditions
Min
Max
IIO = 8 mA
2.7 V < VDD < 3.6 V
-
0.4
2.4
-
-
0.45
VDD-0.45
-
-
1.3
VDD-1.3
-
IIO = 4 mA
1.65 V < VDD < 2.7 V
IIO = 20 mA
2.7 V < VDD < 3.6 V
Unit
V
1. The IIO current sunk by the device must always respect the absolute maximum rating specified in Table 11 and the sum of
IIO (I/O ports and control pins) must not exceed IVSS.
2. Tested in production.
3. The IIO current sourced by the device must always respect the absolute maximum rating specified in Table 11 and the sum
of IIO (I/O ports and control pins) must not exceed IVDD.
4. Based on characterization data, not tested in production.
84/132
DocID17659 Rev 11
STM32L151x6/8/B, STM32L152x6/8/B
Electrical characteristics
Input/output AC characteristics
The definition and values of input/output AC characteristics are given in Figure 19 and
Table 44, respectively.
Unless otherwise specified, the parameters given in Table 44 are derived from tests
performed under ambient temperature and VDD supply voltage conditions summarized in
Table 13.
Table 44. I/O AC characteristics(1)
OSPEEDRx
[1:0] bit
value(1)
Symbol
Parameter
fmax(IO)out
Maximum frequency(3)
tf(IO)out
tr(IO)out
Output rise and fall time
fmax(IO)out
Maximum frequency(3)
tf(IO)out
tr(IO)out
Output rise and fall time
Fmax(IO)out
Maximum frequency(3)
tf(IO)out
tr(IO)out
Output rise and fall time
Fmax(IO)out
Maximum frequency(3)
tf(IO)out
tr(IO)out
Output rise and fall time
tEXTIpw
Pulse width of external
signals detected by the
EXTI controller
00
01
10
11
-
Conditions
Min
Max(2)
CL = 50 pF, VDD = 2.7 V to 3.6 V
-
400
CL = 50 pF, VDD = 1.65 V to 2.7 V
-
400
CL = 50 pF, VDD = 2.7 V to 3.6 V
-
625
CL = 50 pF, VDD = 1.65 V to 2.7 V
-
625
CL = 50 pF, VDD = 2.7 V to 3.6 V
-
2
CL = 50 pF, VDD = 1.65 V to 2.7 V
-
1
CL = 50 pF, VDD = 2.7 V to 3.6 V
-
125
CL = 50 pF, VDD = 1.65 V to 2.7 V
-
250
CL = 50 pF, VDD = 2.7 V to 3.6 V
-
10
CL = 50 pF, VDD = 1.65 V to 2.7 V
-
2
CL = 50 pF, VDD = 2.7 V to 3.6 V
-
25
CL = 50 pF, VDD = 1.65 V to 2.7 V
-
125
CL = 50 pF, VDD = 2.7 V to 3.6 V
-
50
CL = 50 pF, VDD = 1.65 V to 2.7 V
-
8
CL = 30 pF, VDD = 2.7 V to 3.6 V
-
5
CL = 50 pF, VDD = 1.65 V to 2.7 V
-
30
-
8
Unit
kHz
ns
MHz
ns
MHz
ns
MHz
ns
-
1. The I/O speed is configured using the OSPEEDRx[1:0] bits. Refer to the STM32L151x6/8/B and STM32L152x6/8/B
reference manual for a description of GPIO Port configuration register.
2. Guaranteed by design. Not tested in production.
3. The maximum frequency is defined in Figure 19.
DocID17659 Rev 11
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105
Electrical characteristics
STM32L151x6/8/B, STM32L152x6/8/B
Figure 19. I/O AC characteristics definition
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6.3.14
AIB
NRST pin characteristics
The NRST pin input driver uses CMOS technology. It is connected to a permanent pull-up
resistor, RPU (see Table 45).
Unless otherwise specified, the parameters given in Table 45 are derived from tests
performed under ambient temperature and VDD supply voltage conditions summarized in
Table 13.
Table 45. NRST pin characteristics
Symbol
Parameter
Conditions
Min
Typ
-
-
-
-
1.4
-
IOL = 2 mA
2.7 V < VDD < 3.6 V
-
-
IOL = 1.5 mA
1.65 V < VDD < 2.7 V
-
-
-
-
10%VDD(2)
Weak pull-up equivalent
resistor(3)
VIN = VSS
30
45
60
kΩ
NRST input filtered pulse
-
-
-
50
ns
NRST input not filtered pulse
-
350
-
VIL(NRST)(1) NRST input low level voltage
VIH(NRST)
(1)
VOL(NRST)
(1)
Vhys(NRST)(1)
RPU
VF(NRST)(1)
VNF(NRST)
(1)
NRST input high level voltage
NRST output low level
voltage
NRST Schmitt trigger voltage
hysteresis
Max Unit
0.8
V
0.4
mV
ns
1. Guaranteed by design, not tested in production.
2. 200 mV minimum value
3. The pull-up is designed with a true resistance in series with a switchable PMOS. This PMOS contribution to
the series resistance is around 10%.
86/132
DocID17659 Rev 11
STM32L151x6/8/B, STM32L152x6/8/B
Electrical characteristics
Figure 20. Recommended NRST pin protection
6$$
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RESETCIRCUIT
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&ILTER
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AI
1. The reset network protects the device against parasitic resets.
2. The user must ensure that the level on the NRST pin can go below the VIL(NRST) max level specified in
Table 45. Otherwise the reset will not be taken into account by the device.
6.3.15
TIM timer characteristics
The parameters given in Table 46 are guaranteed by design.
Refer to Section 6.3.13: I/O port characteristics for details on the input/output alternate
function characteristics (output compare, input capture, external clock, PWM output).
Table 46. TIMx(1) characteristics
Symbol
tres(TIM)
fEXT
ResTIM
tCOUNTER
Parameter
Conditions
Min
Max
Unit
-
1
-
tTIMxCLK
fTIMxCLK = 32 MHz
31.25
-
ns
Timer external clock
frequency on CH1 to CH4 f
TIMxCLK = 32 MHz
0
fTIMxCLK/2
MHz
0
16
MHz
Timer resolution
-
-
16
bit
16-bit counter clock
period when internal clock
is selected (timer’s
prescaler disabled)
-
1
65536
tTIMxCLK
2048
µs
Timer resolution time
tMAX_COUNT Maximum possible count
fTIMxCLK = 32 MHz 0.0312
-
-
65536 × 65536
tTIMxCLK
fTIMxCLK = 32 MHz
-
134.2
s
1. TIMx is used as a general term to refer to the TIM2, TIM3 and TIM4 timers.
DocID17659 Rev 11
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105
Electrical characteristics
6.3.16
STM32L151x6/8/B, STM32L152x6/8/B
Communication interfaces
I2C interface characteristics
The STM32L151x6/8/B and STM32L152x6/8/B product line I2C interface meets the
requirements of the standard I2C communication protocol with the following restrictions:
SDA and SCL are not “true” open-drain I/O pins. When configured as open-drain, the PMOS
connected between the I/O pin and VDD is disabled, but is still present.
The I2C characteristics are described in Table 47. Refer also to Section 6.3.12: I/O current
injection characteristics for more details on the input/output alternate function characteristics
(SDA and SCL).
Table 47. I2C characteristics
Standard mode I2C(1)
Symbol
Fast mode I2C(1)(2)
Parameter
Unit
Min
Max
Min
Max
tw(SCLL)
SCL clock low time
4.7
-
1.3
-
tw(SCLH)
SCL clock high time
4.0
-
0.6
-
tsu(SDA)
SDA setup time
250
-
100
-
th(SDA)
SDA data hold time
0
-
0
900(3)
tr(SDA)
tr(SCL)
SDA and SCL rise time
-
1000
20 + 0.1Cb
300
tf(SDA)
tf(SCL)
SDA and SCL fall time
-
300
-
300
th(STA)
Start condition hold time
4.0
-
0.6
-
tsu(STA)
Repeated Start condition
setup time
4.7
-
0.6
-
tsu(STO)
Stop condition setup time
4.0
-
0.6
-
μs
tw(STO:STA)
Stop to Start condition time
(bus free)
4.7
-
1.3
-
μs
Cb
Capacitive load for each bus
line
-
400
-
400
pF
µs
ns
µs
1. Guaranteed by design, not tested in production.
2. fPCLK1 must be at least 2 MHz to achieve standard mode I²C frequencies. It must be at least 4 MHz to
achieve fast mode I²C frequencies. It must be a multiple of 10 MHz to reach the 400 kHz maximum I²C fast
mode clock.
3. The maximum Data hold time has only to be met if the interface does not stretch the low period of SCL
signal.
88/132
DocID17659 Rev 11
STM32L151x6/8/B, STM32L152x6/8/B
Electrical characteristics
Figure 21. I2C bus AC waveforms and measurement circuit
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1. RS = series protection resistors
2. RP = pull-up resistors
3. VDD_I2C = I2C bus supply
4. Measurement points are done at CMOS levels: 0.3VDD and 0.7VDD.
Table 48. SCL frequency (fPCLK1= 32 MHz, VDD = VDD_I2C = 3.3 V)(1)(2)
I2C_CCR value
fSCL (kHz)
RP = 4.7 kΩ
400
0x801B
300
0x8024
200
0x8035
100
0x00A0
50
0x0140
20
0x0320
1. RP = External pull-up resistance, fSCL = I2C speed.
2. For speeds around 200 kHz, the tolerance on the achieved speed is of ±5%. For other speed ranges, the
tolerance on the achieved speed is ±2%. These variations depend on the accuracy of the external
components used to design the application.
DocID17659 Rev 11
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105
Electrical characteristics
STM32L151x6/8/B, STM32L152x6/8/B
SPI characteristics
Unless otherwise specified, the parameters given in the following table are derived from
tests performed under ambient temperature, fPCLKx frequency and VDD supply voltage
conditions summarized in Table 13.
Refer to Section 6.3.12: I/O current injection characteristics for more details on the
input/output alternate function characteristics (NSS, SCK, MOSI, MISO).
Table 49. SPI characteristics(1)
Symbol
fSCK
1/tc(SCK)
SPI clock frequency
tr(SCK)(2)
tf(SCK)(2)
SPI clock rise and fall
time
DuCy(SCK)
Min
Max(2)
Master mode
-
16
Slave mode
-
16
Slave transmitter
-
12(3)
Capacitive load: C = 30 pF
-
6
ns
30
70
%
Parameter
Conditions
SPI slave input clock duty
Slave mode
cycle
tsu(NSS)
NSS setup time
Slave mode
4tHCLK
-
th(NSS)
NSS hold time
Slave mode
2tHCLK
-
SCK high and low time
Master mode
tSCK/2− tSCK/2+
5
3
(2)
tw(SCKH)
tw(SCKL)(2)
tsu(MI)(2)
tsu(SI)(2)
th(MI)(2)
th(SI)
(2)
Data input setup time
Data input hold time
Master mode
5
-
Slave mode
6
-
Master mode
5
-
Slave mode
5
-
ta(SO)
(4)
Data output access time
Slave mode
0
3tHCLK
tv(SO)
(2)
Data output valid time
Slave mode
-
33
tv(MO)(2)
Data output valid time
Master mode
-
6.5
Slave mode
17
-
Master mode
0.5
-
th(SO)
(2)
th(MO)
(2)
Data output hold time
Unit
MHz
1. The characteristics above are given for voltage Range 1.
2. Based on characterization, not tested in production.
3. The maximum SPI clock frequency in slave transmitter mode is given for an SPI slave input clock duty
cycle (DuCy(SCK)) ranging between 40 to 60%.
4. Min time is for the minimum time to drive the output and max time is for the maximum time to validate the
data.
90/132
DocID17659 Rev 11
ns
STM32L151x6/8/B, STM32L152x6/8/B
Electrical characteristics
Figure 22. SPI timing diagram - slave mode and CPHA = 0
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Figure 23. SPI timing diagram - slave mode and CPHA = 1(1)
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1. Measurement points are done at CMOS levels: 0.3VDD and 0.7VDD.
DocID17659 Rev 11
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105
Electrical characteristics
STM32L151x6/8/B, STM32L152x6/8/B
Figure 24. SPI timing diagram - master mode(1)
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1. Measurement points are done at CMOS levels: 0.3VDD and 0.7VDD.
USB characteristics
The USB interface is USB-IF certified (full speed).
Table 50. USB startup time
Symbol
tSTARTUP(1)
Parameter
USB transceiver startup time
1. Guaranteed by design, not tested in production.
92/132
DocID17659 Rev 11
Max
Unit
1
µs
STM32L151x6/8/B, STM32L152x6/8/B
Electrical characteristics
Table 51. USB DC electrical characteristics
Symbol
Parameter
Conditions
Min.(1)
Max.(1)
Unit
-
3.0
3.6
V
0.2
-
Input levels
USB operating voltage(2)
VDD
VDI
(3)
Differential input sensitivity
I(USB_DP, USB_DM)
VCM(3)
Differential common mode range Includes VDI range
0.8
2.5
VSE(3)
Single ended receiver threshold
1.3
2.0
-
0.3
2.8
3.6
-
V
Output levels
VOL(4)
Static output level low
RL of 1.5 kΩ to 3.6 V(5)
VOH(4)
Static output level high
RL of 15 kΩ to VSS(5)
V
1. All the voltages are measured from the local ground potential.
2. To be compliant with the USB 2.0 full speed electrical specification, the USB_DP (D+) pin should be pulled
up with a 1.5 kΩ resistor to a 3.0-to-3.6 V voltage range.
3. Guaranteed by characterization, not tested in production.
4. Tested in production.
5. RL is the load connected on the USB drivers.
Figure 25. USB timings: definition of data signal rise and fall time
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Table 52. USB: full speed electrical characteristics
Driver characteristics(1)
Symbol
Parameter
Conditions
Min
Max
Unit
tr
Rise time(2)
CL = 50 pF
4
20
ns
tf
Time(2)
CL = 50 pF
4
20
ns
tr/tf
90
110
%
1.3
2.0
V
trfm
VCRS
Fall
Rise/ fall time matching
Output signal crossover voltage
1. Guaranteed by design, not tested in production.
2. Measured from 10% to 90% of the data signal. For more detailed informations, please refer to USB
Specification - Chapter 7 (version 2.0).
DocID17659 Rev 11
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105
Electrical characteristics
6.3.17
STM32L151x6/8/B, STM32L152x6/8/B
12-bit ADC characteristics
Unless otherwise specified, the parameters given in Table 54 are guaranteed by design.
Table 53. ADC clock frequency
Symbol
fADC
Parameter
ADC clock
frequency
Conditions
Voltage
Range 1 &
2
2.4 V ≤VDDA ≤3.6 V
1.8 V ≤VDDA ≤2.4 V
Min
Max
VREF+ = VDDA
16
VREF+ < VDDA
VREF+ > 2.4 V
8
VREF+ < VDDA
VREF+ ≤2.4 V 0.480
4
VREF+ = VDDA
8
VREF+ < VDDA
4
Voltage Range 3
Unit
MHz
4
Table 54. ADC characteristics
Symbol
Parameter
Min
Typ
Max
Unit
-
1.8
-
3.6
V
VDDA
Power supply
VREF+
Positive reference voltage
2.4 V ≤VDDA ≤3.6 V
VREF+ must be below
or equal to VDDA
1.8(1)
-
VDDA
V
VREF-
Negative reference voltage
-
-
VSSA
-
V
IVDDA
Current on the VDDA input
pin
-
-
1000
1450
µA
IVREF(2)
Current on the VREF input
pin
Peak
-
700
µA
450
µA
V
VAIN
Conversion voltage
12-bit sampling rate
10-bit sampling rate
fS
8-bit sampling rate
6-bit sampling rate
94/132
Conditions
400
Average
-
-
0(4)
-
VREF+
Direct channels
0.03
-
1
Multiplexed channels
0.03
-
0.76
Direct channels
0.03
-
1.07
Multiplexed channels
0.03
-
0.8
Direct channels
0.03
-
1.23
Multiplexed channels
0.03
-
0.89
Direct channels
0.03
-
1.45
Multiplexed channels
0.03
-
1
range(3)
DocID17659 Rev 11
Msps
Msps
Msps
Msps
STM32L151x6/8/B, STM32L152x6/8/B
Electrical characteristics
Table 54. ADC characteristics (continued)
Symbol
tS
Parameter
Sampling time(5)
tCONV
Total conversion time
(including sampling time)
CADC
Internal sample and hold
capacitor
fTRIG
External trigger frequency
Regular sequencer
fTRIG
External trigger frequency
Injected sequencer
RAIN
Signal source
Conditions
Min
Typ
Max
Direct channels
2.4 V ≤VDDA ≤3.6 V
0.25
-
-
Multiplexed channels
2.4 V ≤VDDA ≤3.6 V
0.56
-
-
Direct channels
1.8 V ≤VDDA ≤2.4 V
0.56
-
-
Multiplexed channels
1.8 V ≤VDDA ≤2.4 V
1
-
-
-
4
-
384
1/fADC
fADC = 16 MHz
1
-
24.75
µs
-
Unit
µs
4 to 384 (sampling
phase) +12 (successive
approximation)
1/fADC
Direct channels
-
Multiplexed channels
-
12-bit conversions
-
-
6/8/10-bit conversions
-
-
12-bit conversions
-
-
Tconv+2 1/fADC
6/8/10-bit conversions
-
-
Tconv+1 1/fADC
-
-
-
50
κΩ
impedance(5)
16
-
pF
-
Tconv+1 1/fADC
Tconv
1/fADC
tlat
Injection trigger conversion
latency
fADC = 16 MHz
219
-
281
ns
-
3.5
-
4.5
1/fADC
tlatr
Regular trigger conversion
latency
fADC = 16 MHz
156
-
219
ns
-
2.5
-
3.5
1/fADC
-
-
-
3.5
µs
tSTAB
Power-up time
1. The VREF+ input can be grounded iif neither the ADC nor the DAC are used (this allows to shut down an
external voltage reference).
2. The current consumption through VREF is composed of two parameters:
- one constant (max 300 µA)
- one variable (max 400 µA), only during sampling time + 2 first conversion pulses.
So, peak consumption is 300+400 = 700 µA and average consumption is 300 + [(4 sampling + 2) /16] x 400
= 450 µA at 1Msps
3. VREF+ can be internally connected to VDDA and VREF- can be internally connected to VSSA, depending on
the package. Refer to Section 4: Pin descriptions for further details.
4. VSSA must be tied to ground.
5. See Table 56: Maximum source impedance RAIN max for RAIN limitation.
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105
Electrical characteristics
STM32L151x6/8/B, STM32L152x6/8/B
Table 55. ADC accuracy(1)(2)
Symbol
ET
Parameter
Total unadjusted error
EO
Offset error
EG
Gain error
ED
Differential linearity error
EL
Integral linearity error
ENOB
Effective number of bits
SINAD
Signal-to-noise and
distortion ratio
SNR
Signal-to-noise ratio
THD
Total harmonic distortion
ET
Test conditions
2.4 V ≤ VDDA ≤ 3.6 V
2.4 V ≤ VREF+ ≤ 3.6 V
fADC = 8 MHz, RAIN = 50 Ω
TA = -40 to 105 ° C
2.4 V ≤ VDDA ≤ 3.6 V
VDDA = VREF+
fADC = 16 MHz, RAIN = 50 Ω
TA = -40 to 105 ° C
1 kHz ≤ Finput ≤ 100 kHz
Total unadjusted error
2.4 V ≤ VDDA ≤ 3.6 V
1.8 V ≤ VREF+ ≤ 2.4 V
fADC = 4 MHz, RAIN = 50 Ω
TA = -40 to 105 ° C
Min(3)
Typ
Max(3)
-
2
4
-
1
2
-
1.5
3.5
-
1
2
-
1.7
3
9.2
10
-
57.5
62
-
57.5
62
-
-74
-75
-
-
4
6.5
-
2
4
-
4
6
-
1
2
EO
Offset error
EG
Gain error
ED
Differential linearity error
EL
Integral linearity error
-
1.5
3
ET
Total unadjusted error
-
2
3
EO
Offset error
-
1
1.5
EG
Gain error
-
1.5
2
ED
Differential linearity error
-
1
2
EL
Integral linearity error
-
1
1.5
1.8 V ≤ VDDA ≤ 2.4 V
1.8 V ≤ VREF+ ≤ 2.4 V
fADC = 4 MHz, RAIN = 50 Ω
TA = -40 to 105 ° C
Unit
LSB
bits
dB
LSB
LSB
1. ADC DC accuracy values are measured after internal calibration.
2. ADC accuracy vs. negative injection current: Injecting a negative current on any analog input pins should be avoided as this
significantly reduces the accuracy of the conversion being performed on another analog input. It is recommended to add a
Schottky diode (pin to ground) to analog pins which may potentially inject negative currents.
Any positive injection current within the limits specified for IINJ(PIN) and ΣIINJ(PIN) in Section 6.3.12 does not affect the ADC
accuracy.
3. Based on characterization, not tested in production.
96/132
DocID17659 Rev 11
STM32L151x6/8/B, STM32L152x6/8/B
Electrical characteristics
Figure 26. ADC accuracy characteristics
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Figure 27. Typical connection diagram using the ADC
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1. Refer to Table 56: Maximum source impedance RAIN max for the value of RAIN and Table 54: ADC
characteristics for the value of CADC
2. Cparasitic represents the capacitance of the PCB (dependent on soldering and PCB layout quality) plus the
pad capacitance (roughly 7 pF). A high Cparasitic value will downgrade conversion accuracy. To remedy
this, fADC should be reduced.
DocID17659 Rev 11
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105
Electrical characteristics
STM32L151x6/8/B, STM32L152x6/8/B
Figure 28. Maximum dynamic current consumption on VREF+ supply pin during ADC
conversion
Sampling (n cycles)
Conversion (12 cycles)
ADC clock
Iref+
700µA
300µA
MS36686V1
Table 56. Maximum source impedance RAIN max(1)
RAIN max (kOhm)
Ts
(µs)
Multiplexed channels
Ts (cycles)
Direct channels
fADC= 16 MHz(2)
2.4 V < VDDA< 3.6 V 1.8 V < VDDA < 2.4 V 2.4 V < VDDA< 3.3 V 1.8 V < VDDA < 2.4 V
0.25
Not allowed
Not allowed
0.7
Not allowed
4
0.5625
0.8
Not allowed
2.0
1.0
9
1
2.0
0.8
4.0
3.0
16
1.5
3.0
1.8
6.0
4.5
24
3
6.8
4.0
15.0
10.0
48
6
15.0
10.0
30.0
20.0
96
12
32.0
25.0
50.0
40.0
192
24
50.0
50.0
50.0
50.0
384
1. Guaranteed by design, not tested in production.
2. Number of samples calculated for fADC = 16 MHz. For fADC = 8 and 4 MHz the number of sampling cycles can be
reduced with respect to the minimum sampling time Ts (us).
General PCB design guidelines
Power supply decoupling should be performed as shown in The 10 nF capacitors should be
ceramic (good quality). They should be placed as close as possible to the chip.
98/132
DocID17659 Rev 11
STM32L151x6/8/B, STM32L152x6/8/B
Electrical characteristics
Figure 29. Power supply and reference decoupling (VREF+ not connected to VDDA)
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1. VREF+ and VREF– inputs are available only on 100-pin packages.
Figure 30. Power supply and reference decoupling (VREF+ connected to VDDA)
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1. VREF+ and VREF– inputs are available only on 100-pin packages.
DocID17659 Rev 11
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105
Electrical characteristics
6.3.18
STM32L151x6/8/B, STM32L152x6/8/B
DAC electrical specifications
Data guaranteed by design, not tested in production, unless otherwise specified.
Table 57. DAC characteristics
Symbol
Parameter
Conditions
Min
Typ
Max
Unit
-
1.8
-
3.6
V
1.8
-
3.6
V
VDDA
Analog supply voltage
VREF+
Reference supply voltage
VREF-
Lower reference voltage
-
IDDVREF+(1)
Current consumption on
VREF+ supply
VREF+ = 3.3 V
No load, middle code (0x800)
-
130
220
µA
No load, worst code (0x000)
-
220
350
µA
IDDA(1)
Current consumption on
VDDA supply
VDDA = 3.3 V
No load, middle code (0x800)
-
210
320
µA
No load, worst code (0xF1C)
-
320
520
µA
RL(2)
Resistive load
5
-
-
kΩ
-
-
50
pF
DAC output buffer OFF
12
16
20
kΩ
DAC output buffer ON
0.2
-
VDDA – 0.2
V
DAC output buffer OFF
0.5
-
VREF+ –
1LSB
mV
CL ≤ 50 pF, RL ≥ 5 kΩ
DAC output buffer ON
-
1.5
3
No RLOAD, CL ≤ 50 pF
DAC output buffer OFF
-
1.5
3
CL ≤ 50 pF, RL ≥ 5 kΩ
DAC output buffer ON
-
2
4
No RLOAD, CL ≤ 50 pF
DAC output buffer OFF
-
2
4
CL ≤ 50 pF, RL ≥ 5 kΩ
DAC output buffer ON
-
±10
±25
No RLOAD, CL ≤ 50 pF
DAC output buffer OFF
-
±5
±8
No RLOAD, CL ≤ 50 pF
DAC output buffer OFF
-
±1.5
±5
CL
(2)
Capacitive load
Output impedance
RO
VDAC_OUT
DNL(1)
INL(1)
Offset
Offset1(1)
100/132
DAC output buffer ON
VSSA
V
Voltage on DAC_OUT
output
Differential non
linearity(3)
Integral non
(1)
VREF+ must always be below
VDDA
linearity(4)
Offset error at code
0x800 (5)
Offset error at code
0x001(6)
DocID17659 Rev 11
LSB
STM32L151x6/8/B, STM32L152x6/8/B
Electrical characteristics
Table 57. DAC characteristics (continued)
Symbol
Min
Typ
Max
VDDA = 3.3V, TA = 0 to 50 ° C
DAC output buffer OFF
-20
-10
0
VDDA = 3.3V, TA = 0 to 50 ° C
DAC output buffer ON
0
20
50
CL ≤ 50 pF, RL ≥ 5 kΩ
DAC output buffer ON
-
+0.1 /
-0.2%
+0.2 / -0.5%
No RLOAD, CL ≤ 50 pF
DAC output buffer OFF
-
+0 / -0.2%
+0 / -0.4%
VDDA = 3.3V, TA = 0 to 50 ° C
DAC output buffer OFF
-10
-2
0
VDDA = 3.3V, TA = 0 to 50 ° C
DAC output buffer ON
-40
-8
0
CL ≤ 50 pF, RL ≥ 5 kΩ
DAC output buffer ON
-
12
30
No RLOAD, CL ≤ 50 pF
DAC output buffer OFF
-
8
12
tSETTLING
Settling time (full scale:
for a 12-bit code
transition between the
lowest and the highest
input codes till
DAC_OUT reaches final
value ±1LSB
CL ≤ 50 pF, RL ≥ 5 kΩ
-
7
12
µs
Update rate
Max frequency for a
correct DAC_OUT
change (95% of final
value) with 1 LSB
variation in the input
code
CL ≤ 50 pF, RL ≥ 5 kΩ
-
-
1
Msps
tWAKEUP
Wakeup time from off
state (setting the ENx bit
in the DAC Control
register)(8)
CL ≤ 50 pF, RL ≥ 5 kΩ
-
9
15
µs
PSRR+
VDDA supply rejection
ratio (static DC
measurement)
CL ≤ 50 pF, RL ≥ 5 kΩ
-
-60
-35
dB
dOffset/dT
Gain
(1)
(1)
dGain/dT
Parameter
Offset error temperature
coefficient (code 0x800)
(7)
Gain error
(1)
(1)
TUE
Gain error temperature
coefficient
Total unadjusted error
Conditions
Unit
µV/°C
%
µV/°C
LSB
1. Data based on characterization results.
2. Connected between DAC_OUT and VSSA.
3. Difference between two consecutive codes - 1 LSB.
4. Difference between measured value at Code i and the value at Code i on a line drawn between Code 0 and last Code 4095.
5. Difference between the value measured at Code (0x800) and the ideal value = V/2.
6. Difference between the value measured at Code (0x001) and the ideal value.
7. Difference between ideal slope of the transfer function and measured slope computed from code 0x000 and 0xFFF when
buffer is OFF, and from code giving 0.2 V and (VDDA – 0.2) V when buffer is ON.
DocID17659 Rev 11
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105
Electrical characteristics
STM32L151x6/8/B, STM32L152x6/8/B
8. In buffered mode, the output can overshoot above the final value for low input code (starting from min value).
Figure 31. 12-bit buffered /non-buffered DAC
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1. The DAC integrates an output buffer that can be used to reduce the output impedance and to drive external
loads directly without the use of an external operational amplifier. The buffer can be bypassed by
configuring the BOFFx bit in the DAC_CR register.
6.3.19
Temperature sensor characteristics
Table 58. Temperature sensor calibration values
Calibration value name
Description
Memory address
TS_CAL1
TS ADC raw data acquired at
temperature of 30 °C,
VDDA= 3 V
0x1FF8 007A-0x1FF8 007B
TS_CAL2
TS ADC raw data acquired at
temperature of 110 °C
VDDA= 3 V
0x1FF8 007E-0x1FF8 007F
Table 59. Temperature sensor characteristics
Symbol
TL
(1)
Min
Typ
Max
Unit
-
±1
±2
°C
1.48
1.61
1.75
mV/°C
612
626.8
641.5
mV
Current consumption
-
3.4
6
µA
Startup time
-
-
10
10
-
-
VSENSE linearity with temperature
Avg_Slope(1)
Average slope
(2)
Voltage at 110°C ±5°C
V110
IDDA(TEMP)
tSTART
Parameter
(3)
(3)
TS_temp(4)(3)
ADC sampling time when reading the
temperature
1. Guaranteed by characterization, not tested in production.
2. Measured at VDD = 3 V ±10 mV. V110 ADC conversion result is stored in the TS_CAL2 byte.
3. Guaranteed by design, not tested in production.
4. Shortest sampling time can be determined in the application by multiple iterations.
102/132
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µs
STM32L151x6/8/B, STM32L152x6/8/B
6.3.20
Electrical characteristics
Comparator
Table 60. Comparator 1 characteristics
Symbol
Parameter
Conditions
Min(1)
Typ
Max(1)
Unit
3.6
V
VDDA
Analog supply voltage
-
1.65
R400K
R400K value
-
-
400
-
R10K
R10K value
-
-
10
-
Comparator 1 input
voltage range
-
0.6
-
VDDA
Comparator startup time
-
-
7
10
-
-
3
10
-
-
±3
±10
mV
0
1.5
10
mV/1000 h
-
160
260
nA
VIN
tSTART
td
Propagation delay
Voffset
Comparator offset
dVoffset/dt
ICOMP1
(2)
Comparator offset
variation in worst voltage
stress conditions
Current consumption(3)
VDDA = 3.6 V
VIN+ = 0 V
VIN- = VREFINT
TA = 25 ° C
-
kΩ
V
µs
1. Based on characterization, not tested in production.
2. The delay is characterized for 100 mV input step with 10 mV overdrive on the inverting input, the noninverting input set to the reference.
3. Comparator consumption only. Internal reference voltage not included.
DocID17659 Rev 11
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105
Electrical characteristics
STM32L151x6/8/B, STM32L152x6/8/B
Table 61. Comparator 2 characteristics
Symbol
VDDA
VIN
Parameter
Analog supply voltage
-
Comparator 2 input voltage range
-
tSTART
Comparator startup time
td slow
Propagation delay(2) in slow mode
td fast
Propagation delay(2) in fast mode
Voffset
Comparator offset error
dThreshold/ Threshold voltage temperature
dt
coefficient
ICOMP2
Conditions
Current consumption(3)
Min
-
3.6
V
0
-
VDDA
V
Fast mode
-
15
20
Slow mode
-
20
25
1. V ≤VDDA ≤2.7 V
-
1.8
3.5
2.7 V ≤VDDA ≤3.6 V
-
2.5
6
1. V ≤VDDA ≤2.7 V
-
0.8
2
2.7 V ≤VDDA ≤3.6 V
-
1.2
4
-
±4
±20
mV
VDDA = 3.3V
TA = 0 to 50 ° C
V- = VREFINT,
3/4 VREFINT,
1/2 VREFINT,
1/4 VREFINT
-
15
30
ppm
/°C
Fast mode
-
3.5
5
Slow mode
-
0.5
2
-
1.
Typ Max(1) Unit
1. Based on characterization, not tested in production.
2. The delay is characterized for 100 mV input step with 10 mV overdrive on the inverting input, the noninverting input set to the reference.
3. Comparator consumption only. Internal reference voltage (necessary for comparator operation) is not
included.
104/132
DocID17659 Rev 11
µs
µA
STM32L151x6/8/B, STM32L152x6/8/B
6.3.21
Electrical characteristics
LCD controller (STM32L152xx only)
The STM32L152xx embeds a built-in step-up converter to provide a constant LCD reference
voltage independently from the VDD voltage. An external capacitor Cext must be connected
to the VLCD pin to decouple this converter.
Table 62. LCD controller characteristics
Symbol
Parameter
Min
Typ
Max
Unit
VLCD
LCD external voltage
-
-
3.6
VLCD0
LCD internal reference voltage 0
-
2.6
-
VLCD1
LCD internal reference voltage 1
-
2.73
-
VLCD2
LCD internal reference voltage 2
-
2.86
-
VLCD3
LCD internal reference voltage 3
-
2.98
-
VLCD4
LCD internal reference voltage 4
-
3.12
-
VLCD5
LCD internal reference voltage 5
-
3.26
-
VLCD6
LCD internal reference voltage 6
-
3.4
-
VLCD7
LCD internal reference voltage 7
-
3.55
-
0.1
-
2
Supply current at VDD = 2.2 V
-
3.3
-
Supply current at VDD = 3.0 V
-
3.1
-
Low drive resistive network overall value
5.28
6.6
7.92
MΩ
High drive resistive network total value
192
240
288
kΩ
V
Cext
ILCD(1)
RHtot(2)
RL
(2)
VLCD external capacitance
V44
Segment/Common highest level voltage
-
-
VLCD
V34
Segment/Common 3/4 level voltage
-
3/4 VLCD
-
V23
Segment/Common 2/3 level voltage
-
2/3 VLCD
-
V12
Segment/Common 1/2 level voltage
-
1/2 VLCD
-
V13
Segment/Common 1/3 level voltage
-
1/3 VLCD
-
V14
Segment/Common 1/4 level voltage
-
1/4 VLCD
-
V0
Segment/Common lowest level voltage
0
-
-
Segment/Common level voltage error
TA = -40 to 85 ° C
-
-
± 50
ΔVxx(3)
V
µF
µA
V
mV
1. LCD enabled with 3 V internal step-up active, 1/8 duty, 1/4 bias, division ratio= 64, all pixels active, no LCD
connected
2. Guaranteed by design, not tested in production.
3. Based on characterization, not tested in production.
DocID17659 Rev 11
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105
Package characteristics
STM32L151x6/8/B, STM32L152x6/8/B
7
Package characteristics
7.1
Package mechanical data
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.
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STM32L151x6/8/B, STM32L152x6/8/B
Package characteristics
Figure 32. LQFP100 14 x 14 mm, 100-pin low-profile quad flat package outline
MM
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%
%
%
B
E
,?-%?6
1. Drawing is not to scale.
DocID17659 Rev 11
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131
Package characteristics
STM32L151x6/8/B, STM32L152x6/8/B
Table 63. LQPF100 14 x 14 mm, 100-pin low-profile quad flat package
mechanical data
inches(1)
millimeters
Symbol
Min
Typ
Max
Min
Typ
Max
A
-
-
1.600
-
-
0.0630
A1
0.050
-
0.150
0.0020
-
0.0059
A2
1.350
1.400
1.450
0.0531
0.0551
0.0571
b
0.170
0.220
0.270
0.0067
0.0087
0.0106
c
0.090
-
0.200
0.0035
-
0.0079
D
15.800
16.000
16.200
0.6220
0.6299
0.6378
D1
13.800
14.000
14.200
0.5433
0.5512
0.5591
D3
-
12.000
-
-
0.4724
-
E
15.800
16.000
16.200
0.6220
0.6299
0.6378
E1
13.800
14.000
14.200
0.5433
0.5512
0.5591
E3
-
12.000
-
-
0.4724
-
e
-
0.500
-
-
0.0197
-
L
0.450
0.600
0.750
0.0177
0.0236
0.0295
L1
-
1.000
-
-
0.0394
-
k
0.0°
3.5°
7.0°
0.0°
3.5°
7.0°
ccc
-
-
0.080
-
-
0.0031
1. Values in inches are converted from mm and rounded to 4 decimal digits.
108/132
DocID17659 Rev 11
STM32L151x6/8/B, STM32L152x6/8/B
Package characteristics
Figure 33. LQFP100 recommended footprint
AIC
1. Dimensions are in millimeters.
Figure 34. LQFP100 marking example (package top view)
3URGXFWLGHQWLILFDWLRQ
670/
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975
5HYLVLRQFRGH
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3LQ
LQGHQWLILHU
06Y9
1. Parts marked as “ES”, “E” or accompanied by an Engineering Sample notification letter, are not yet
qualified and therefore not yet ready to be used in production and any consequences deriving from such
usage will not be at ST charge. In no event, ST will be liable for any customer usage of these engineering
samples in production. ST Quality has to be contacted prior to any decision to use these Engineering
samples to run qualification activity.
DocID17659 Rev 11
109/132
131
Package characteristics
STM32L151x6/8/B, STM32L152x6/8/B
Figure 35. LQFP64 10 x 10 mm, 64-pin low-profile quad flat package outline
PP
*$8*(3/$1(
F
$
$
$
6($7,1*3/$1(
&
$
FFF &
'
'
'
.
/
/
3,1
,'(17,),&$7,21
(
(
(
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H
:B0(B9
1. Drawing is not to scale.
110/132
DocID17659 Rev 11
STM32L151x6/8/B, STM32L152x6/8/B
Package characteristics
Table 64. LQFP64 10 x 10 mm 64-pin low-profile quad flat package mechanical data
inches(1)
millimeters
Symbol
Min
Typ
Max
Typ
Min
Max
A
-
-
1.600
-
-
0.0630
A1
0.050
-
0.150
0.0020
-
0.0059
A2
1.350
1.400
1.450
0.0531
0.0551
0.0571
b
0.170
0.220
0.270
0.0067
0.0087
0.0106
c
0.090
-
0.200
0.0035
-
0.0079
D
11.800
12.000
12.200
0.4646
0.4724
0.4803
D1
9.800
10.000
10.200
0.3858
0.3937
0.4016
D3
-
7.500
-
-
0.2953
-
E
11.800
12.000
12.200
0.4646
0.4724
0.4803
E1
9.800
10.000
10.200
0.3858
0.3937
0.4016
E3
-
7.500
-
-
0.2953
-
e
-
0.500
-
-
0.0197
-
L
0.450
0.600
0.750
0.0177
0.0236
0.0295
L1
-
1.000
-
-
0.0394
-
ccc
-
-
0.080
-
-
0.0031
K
0.0
3.5
7.0
0.0
3.5
7.0
1. Values in inches are converted from mm and rounded to 4 decimal digits.
Figure 36. LQFP64 recommended footprint
AIC
1. Dimensions are in millimeters.
DocID17659 Rev 11
111/132
131
Package characteristics
STM32L151x6/8/B, STM32L152x6/8/B
Figure 37. LQFP64 marking example (package top view)
5HYLVLRQFRGH
3URGXFWLGHQWLILFDWLRQ
5
670/
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'DWHFRGH
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1. Parts marked as “ES”, “E” or accompanied by an Engineering Sample notification letter, are not yet
qualified and therefore not yet ready to be used in production and any consequences deriving from such
usage will not be at ST charge. In no event, ST will be liable for any customer usage of these engineering
samples in production. ST Quality has to be contacted prior to any decision to use these Engineering
samples to run qualification activity.
112/132
DocID17659 Rev 11
STM32L151x6/8/B, STM32L152x6/8/B
Package characteristics
Figure 38. LQFP48 7 x 7 mm, 48-pin low-profile quad flat package outline
C
!
!
!
3%!4).'
0,!.%
#
MM
'!5'%0,!.%
CCC #
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!
$
$
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)$%.4)&)#!4)/.
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%
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B
E
"?-%?6
1. Drawing is not to scale.
DocID17659 Rev 11
113/132
131
Package characteristics
STM32L151x6/8/B, STM32L152x6/8/B
Table 65. LQFP48 7 x 7 mm, 48-pin low-profile quad flat package mechanical data
inches(1)
millimeters
Symbol
Min
Typ
Max
Min
Typ
Max
A
-
-
1.600
-
-
0.0630
A1
0.050
-
0.150
0.0020
-
0.0059
A2
1.350
1.400
1.450
0.0531
0.0551
0.0571
b
0.170
0.220
0.270
0.0067
0.0087
0.0106
c
0.090
-
0.200
0.0035
-
0.0079
D
8.800
9.000
9.200
0.3465
0.3543
0.3622
D1
6.800
7.000
7.200
0.2677
0.2756
0.2835
D3
-
5.500
-
-
0.2165
-
E
8.800
9.000
9.200
0.3465
0.3543
0.3622
E1
6.800
7.000
7.200
0.2677
0.2756
0.2835
E3
-
5.500
-
-
0.2165
-
e
-
0.500
-
-
0.0197
-
L
0.450
0.600
0.750
0.0177
0.0236
0.0295
L1
-
1.000
-
-
0.0394
-
k
0°
3.5°
7°
0°
3.5°
7°
ccc
-
-
0.080
-
-
0.0031
1. Values in inches are converted from mm and rounded to 4 decimal digits.
Figure 39. LQFP48 recommended footprint
AID
1. Dimensions are in millimeters.
114/132
DocID17659 Rev 11
STM32L151x6/8/B, STM32L152x6/8/B
Package characteristics
Figure 40. LQFP48 marking example (package top view)
3URGXFW
LGHQWLILFDWLRQ
45.$5
'DWHFRGH
: 88
3LQ
LGHQWLILFDWLRQ
5HYLVLRQFRGH
3
069
1. Parts marked as “ES”, “E” or accompanied by an Engineering Sample notification letter, are not yet
qualified and therefore not yet ready to be used in production and any consequences deriving from such
usage will not be at ST charge. In no event, ST will be liable for any customer usage of these engineering
samples in production. ST Quality has to be contacted prior to any decision to use these Engineering
samples to run qualification activity.
DocID17659 Rev 11
115/132
131
Package characteristics
STM32L151x6/8/B, STM32L152x6/8/B
Figure 41. UFQFPN48 7 x 7 mm 0.5 mm pitch, ultra thin fine-pitch quad flat no-lead
package outline
3LQLGHQWLILHU
ODVHUPDUNLQJDUHD
'
$
(
(
7
GGG
$
6HDWLQJ
SODQH
E
H
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'
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DUHD
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/
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SLQFRUQHU
(
5W\S
'HWDLO=
=
$%B0(B9
1. Drawing is not to scale.
2. All leads/pads should also be soldered to the PCB to improve the lead/pad solder joint life.
3. There is an exposed die pad on the underside of the UFQFPN package. It is recommended to connect and
solder this back-side pad to PCB ground.
116/132
DocID17659 Rev 11
STM32L151x6/8/B, STM32L152x6/8/B
Package characteristics
Table 66. UFQFPN48 7 x 7 mm, 0.5 mm pitch, ultra thin fine-pitch quad flat no-lead
package mechanical data
inches(1)
millimeters
Symbol
Min
Typ
Max
Min
Typ
Max
A
0.500
0.550
0.600
0.0197
0.0217
0.0236
A1
0.000
0.020
0.050
0.0000
0.0008
0.0020
D
6.900
7.000
7.100
0.2717
0.2756
0.2795
E
6.900
7.000
7.100
0.2717
0.2756
0.2795
D2
5.500
5.600
5.700
0.2165
0.2205
0.2244
E2
5.500
5.600
5.700
0.2165
0.2205
0.2244
L
0.300
0.400
0.500
0.0118
0.0157
0.0197
T
-
0.152
-
-
0.0060
-
b
0.200
0.250
0.300
0.0079
0.0098
0.0118
e
-
0.500
-
-
0.0197
-
ddd
-
-
0.080
-
-
0.0031
1. Values in inches are converted from mm and rounded to 4 decimal digits.
Figure 42. UFQFPN48 recommended footprint
!"?-%?&0
1. Dimensions are in millimeters.
DocID17659 Rev 11
117/132
131
Package characteristics
STM32L151x6/8/B, STM32L152x6/8/B
Figure 43. UFQFPN48 marking example (package top view)
3URGXFW
LGHQWLILFDWLRQ
45.$6
'DWHFRGH
: 88
3LQ
LGHQWLILFDWLRQ
5HYLVLRQFRGH
3
069
1. Parts marked as “ES”, “E” or accompanied by an Engineering Sample notification letter, are not yet
qualified and therefore not yet ready to be used in production and any consequences deriving from such
usage will not be at ST charge. In no event, ST will be liable for any customer usage of these engineering
samples in production. ST Quality has to be contacted prior to any decision to use these Engineering
samples to run qualification activity.
Figure 44. UFBGA100 7 x 7 x 0.6 mm 0.5 mm pitch, ultra thin fine-pitch ball grid array
package outline
= 6HDWLQJSODQH
GGG =
$ $ $
$ $
(
H
$EDOO
$EDOO
LGHQWLILHU LQGH[DUHD
)
;
(
$
)
'
'
H
<
0
%277209,(:
EEDOOV
HHH 0 = < ;
III 0 =
1. Drawing is not to scale.
118/132
DocID17659 Rev 11
7239,(:
$&B0(B9
STM32L151x6/8/B, STM32L152x6/8/B
Package characteristics
Table 67. UFBGA100 7 x 7 x 0.6 mm 0.5 mm pitch, ultra thin fine-pitch ball grid array
package mechanical data
inches(1)
millimeters
Symbol
Min
Typ
Max
Min
Typ
Max
A
-
-
0.6
-
-
0.0236
A1
0.05
0.08
0.11
0.002
0.0031
0.0043
A2
0.4
0.45
0.5
0.0157
0.0177
0.0197
A3
0.08
0.13
0.18
0.0031
0.0051
0.0071
A4
0.27
0.32
0.37
0.0106
0.0126
0.0146
b
0.2
0.25
0.3
0.0079
0.0098
0.0118
D
6.95
7
7.05
0.2736
0.2756
0.2776
D1
5.45
5.5
5.55
0.2146
0.2165
0.2185
E
6.95
7
7.05
0.2736
0.2756
0.2776
E1
5.45
5.5
5.55
0.2146
0.2165
0.2185
e
-
0.5
-
-
0.0197
-
F
0.7
0.75
0.8
0.0276
0.0295
0.0315
ddd
-
-
0.1
-
-
0.0039
eee
-
-
0.15
-
-
0.0059
fff
-
-
0.05
-
-
0.002
1. Values in inches are converted from mm and rounded to 4 decimal digits.
Figure 45. UFBGA100 marking example (package top view)
3URGXFW
LGHQWLILFDWLRQ
45.-
7)
'DWHFRGH
: 88
3LQ
LGHQWLILFDWLRQ
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3
069
1. Parts marked as “ES”, “E” or accompanied by an Engineering Sample notification letter, are not yet
qualified and therefore not yet ready to be used in production and any consequences deriving from such
usage will not be at ST charge. In no event, ST will be liable for any customer usage of these engineering
samples in production. ST Quality has to be contacted prior to any decision to use these Engineering
samples to run qualification activity.
DocID17659 Rev 11
119/132
131
Package characteristics
STM32L151x6/8/B, STM32L152x6/8/B
Figure 46. TFBGA64 - 5.0x5.0x1.2 mm, 0.5 mm pitch, thin fine-pitch ball grid array
package outline
(
$
(
)
H
+
)
'
'
EEDOOV
HHH 0 & % $
III 0 &
$
%
H
$EDOO
LQGH[DUHD
7239,(:
$EDOO
LGHQWLILHU
%277209,(:
& 6HDWLQJSODQH
GGG &
$
$
$ $
6,'(9,(:
5B0(B9
1. Drawing is not to scale.
Table 68. TFBGA64 5.0x5.0x1.2 mm, 0.5 mm pitch thin fine-pitch ball grid array
package mechanical data
inches(1)
millimeters
Symbol
120/132
Min
Typ
Max
Min
Typ
Max
A
-
-
1.200
-
-
0.0472
A1
0.150
-
-
0.0059
-
-
A2
-
0.200
-
-
0.0079
-
A4
-
-
0.600
-
-
0.0236
b
0.250
0.300
0.350
0.0098
0.0118
0.0138
D
4.850
5.000
5.150
0.1909
0.1969
0.2028
D1
-
3.500
-
-
0.1378
-
E
4.850
5.000
5.150
0.1909
0.1969
0.2028
E1
-
3.500
-
-
0.1378
-
e
-
0.500
-
-
0.0197
-
F
-
0.750
-
-
0.0295
-
ddd
-
-
0.080
-
-
0.0031
DocID17659 Rev 11
STM32L151x6/8/B, STM32L152x6/8/B
Package characteristics
Table 68. TFBGA64 5.0x5.0x1.2 mm, 0.5 mm pitch thin fine-pitch ball grid array
package mechanical data (continued)
inches(1)
millimeters
Symbol
Min
Typ
Max
Min
Typ
Max
eee
-
-
0.15
-
-
0.0059
fff
-
-
0.05
-
-
0.002
1. Values in inches are converted from mm and rounded to 4 decimal digits.
Figure 47. TFBGA64 marking example (package top view)
3URGXFWLGHQWLILFDWLRQ
/5+
'DWHFRGH
< ::
5HYLVLRQFRGH
3LQ
LQGHQWLILHU
5
06Y9
1. Parts marked as “ES”, “E” or accompanied by an Engineering Sample notification letter, are not yet
qualified and therefore not yet ready to be used in production and any consequences deriving from such
usage will not be at ST charge. In no event, ST will be liable for any customer usage of these engineering
samples in production. ST Quality has to be contacted prior to any decision to use these Engineering
samples to run qualification activity.
DocID17659 Rev 11
121/132
131
Package characteristics
STM32L151x6/8/B, STM32L152x6/8/B
Figure 48. Recommended PCB design rules for pads (0.5 mm pitch BGA)
0ITCH
MM
$PAD
MM
$SM
MMTYPDEPENDSON
THESOLDERMASKREGISTRATION
TOLERANCE
3OLDERPASTE
MMAPERTUREDIAMETER
$PAD
$SM
AI
1. Non solder mask defined (NSMD) pads are recommended
2. 4 to 6 mils solder paste screen printing process
122/132
DocID17659 Rev 11
STM32L151x6/8/B, STM32L152x6/8/B
7.2
Package characteristics
Thermal characteristics
The maximum chip-junction temperature, TJ max, in degrees Celsius, may be calculated
using the following equation:
TJ max = TA max + (PD max × ΘJA)
Where:
•
TA max is the maximum ambient temperature in ° C,
•
ΘJA is the package junction-to-ambient thermal resistance, in ° C/W,
•
PD max is the sum of PINT max and PI/O max (PD max = PINT max + PI/Omax),
•
PINT max is the product of IDD and VDD, expressed in Watts. This is the maximum chip
internal power.
PI/O max represents the maximum power dissipation on output pins where:
PI/O max = Σ (VOL × IOL) + Σ((VDD – VOH) × IOH),
taking into account the actual VOL / IOL and VOH / IOH of the I/Os at low and high level in the
application.
Table 69. Thermal characteristics
Symbol
ΘJA
Parameter
Value
Thermal resistance junction-ambient
BGA100 - 7 x 7 mm
59
Thermal resistance junction-ambient
LQFP100 - 14 x 14 mm / 0.5 mm pitch
46
Thermal resistance junction-ambient
TFBGA64 - 5 x 5 mm
65
Thermal resistance junction-ambient
LQFP64 - 10 x 10 mm / 0.5 mm pitch
45
Thermal resistance junction-ambient
LQFP48 - 7 x 7 mm / 0.5 mm pitch
55
Thermal resistance junction-ambient
UFQFPN48 - 7 x 7 mm / 0.5 mm pitch
16
DocID17659 Rev 11
Unit
°C/W
123/132
131
Package characteristics
STM32L151x6/8/B, STM32L152x6/8/B
Figure 49. Thermal resistance
)RUELGGHQDUHD
7-!7-PD[
84)3[PP
/4)3[PP
3'P:
/4)3[PP
/4)3[PP
8)%*$[PP
7)%*$[PP
7HPSHUDWXUHΣ
7.2.1
06Y9
Reference document
JESD51-2 Integrated Circuits Thermal Test Method Environment Conditions - Natural
Convection (Still Air). Available from www.jedec.org.
124/132
DocID17659 Rev 11
STM32L151x6/8/B, STM32L152x6/8/B
8
Part numbering
Part numbering
Table 70. Ordering information scheme
Example:
STM32
L 151 C 8
T
6
T
TR
Device family
STM32 = ARM-based 32-bit microcontroller
Product type
L = Low power
Device subfamily
151: Devices without LCD
152: Devices with LCD
Pin count
C = 48 pins
R = 64 pins
V = 100 pins
Flash memory size
6 = 32 Kbytes of Flash memory
8 = 64 Kbytes of Flash memory
B = 128 Kbytes of Flash memory
Package
H = BGA
T = LQFP
U = UFQFPN
Temperature range
6 = Industrial temperature range, –40 to 85 °C
Options
No character = VDD range: 1.8 to 3.6 V and BOR enabled
T = VDD range: 1.65 to 3.6 V and BOR disabled
Packing
TR = tape and reel
No character = tray or tube
For a list of available options (speed, package, etc.) or for further information on any aspect
of this device, please contact your nearest ST sales office.
DocID17659 Rev 11
125/132
131
Revision history
9
STM32L151x6/8/B, STM32L152x6/8/B
Revision history
Table 71. Document revision history
Date
Revision
02-Jul-2010
1
Initial release.
2
Removed 5 V tolerance (FT) from PA3, PB0 and PC3 in Table 8:
STM32L15xx6/8/B pin definitions
Updated Table 14: Embedded reset and power control block
characteristics
Updated Table 16: Embedded internal reference voltage
Added Table 53: ADC clock frequency
Updated Table 54: ADC characteristics
3
Modified consumptions on page 1 and in Section 3.1: Low power
modes
LED_SEG8 removed on PB6.
Updated Section 6: Electrical characteristics
VFQFPN48 replaced by UFQFPN48
4
Section 3.3.2: Power supply supervisor: updated note.
Table 8: STM32L15xx6/8/B pin definitions: modified main function
(after reset) and alternate function for OSC_IN and OSC_OUT pins;
modified footnote 5; added footnote to OSC32_IN and OSC32_OUT
pins; C1 and D1 removed on PD0 and PD1 pins (TFBGA64
column).
Section 3.11: DAC (digital-to-analog converter): updated bullet list.
Table 10: Voltage characteristics on page 52: updated footnote 3
regarding IINJ(PIN).
Table 11: Current characteristics on page 52: updated footnote 4
regarding positive and negative injection.
Table 14: Embedded reset and power control block characteristics
on page 54: updated typ and max values for TRSTTEMPO (VDD
rising, BOR enabled).
Table 17: Current consumption in Run mode, code with data
processing running from Flash on page 58: removed values for HSI
clock source (16 MHz), Range 3.
Table 18: Current consumption in Run mode, code with data
processing running from RAM on page 59: removed values for HSI
clock source (16 MHz), Range 3.
Table 19: Current consumption in Sleep mode on page 60 removed
values for HSI clock source (16 MHz), Range 3 for both RAM and
Flash; changed units.
Table 20: Current consumption in Low power run mode on page 62:
updated parameter and max value of IDD Max (LP Run).
Table 21: Current consumption in Low power sleep mode on
page 63: updated symbol, parameter, and max value of IDD Max (LP
Sleep).
Table 22: Typical and maximum current consumptions in Stop mode
on page 64 updated values for IDD (Stop with RTC) - RTC clocked by
LSE external clock (32.768 kHz), regulator in LP mode, HSI and
HSE OFF (no independent watchdog).
01-Oct-2010
16-Dec-2010
25-Feb-2011
126/132
Changes
DocID17659 Rev 11
STM32L151x6/8/B, STM32L152x6/8/B
Revision history
Table 71. Document revision history (continued)
Date
25-Feb-2011
Revision
Changes
Updated Table 23: Typical and maximum current consumptions in
Standby mode on page 66 (IDD (WU from Standby) instead of (IDD
(WU from Stop).
Table 25: Low-power mode wakeup timings on page 69: updated
condition for Wakeup from Stop mode, regulator in Run mode;
updated max values for Wakeup from Stop mode, regulator in low
power mode; updated max values for tWUSTDBY.
Table 24: Peripheral current consumption on page 67: updated
values for column Low power sleep and run; updated Flash values;
renamed ADC1 to ADC; updated IDD (LCD) value; updated units;
added values for IDD (RTC) and IDD (IWDG); updated footnote 1 and 3;
added foot note 2 concerning ADC.
Table 26: High-speed external user clock characteristics on
page 70: added min value for tw(HSE)/tw(HSE) OSC_IN high or low
time; added max value for tr(HSE)/tf(HSE) OSC_IN rise or fall time;
updated IL for typ and max values.
Table 27: Low-speed external user clock characteristics on page 71:
updated max value for IL.
Table 28: HSE oscillator characteristics on page 72: renamed i2 as
IHSE and updated max value; updated max values for IDD(HSE).
Table 29: LSE oscillator characteristics (fLSE = 32.768 kHz) on
page 73: updated max value for ILSE.
4
Table 30: HSI oscillator characteristics on page 75: updated some
(continued) min and max values for ACC .
HSI
Table 32: MSI oscillator characteristics on page 76: updated
parameter, typ, and max values for DVOLT(MSI).
Table 35: Flash memory and data EEPROM characteristics on
page 78: updated typ values for tprog.
Table 44: I/O AC characteristics on page 85: updated some max
values for 01, 10, and 11; updated min value; updated footnotes.
Table 55: ADC accuracy on page 96: updated typ values and some
of the test conditions for ENOB, SINAD, SNR, and THD.
Table 57: DAC characteristics on page 100: updated footnote 7 and
added footnote 8.
Updated leakage value in Figure 27: Typical connection diagram
using the ADC.
Added Figure 28: Maximum dynamic current consumption on
VREF+ supply pin during ADC conversion.
Added Table 56: RAIN max for fADC = 16 MHz on page 98
Figure 29: Power supply and reference decoupling (VREF+ not
connected to VDDA): replaced all 10 nF capacitors with 100 nF
capacitors.
Figure 30: Power supply and reference decoupling (VREF+
connected to VDDA): replaced 10 nF capacitor with 100 nF
capacitor.
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Revision history
STM32L151x6/8/B, STM32L152x6/8/B
Table 71. Document revision history (continued)
Date
17-June-2011
25-Jan-2012
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Revision
Changes
5
Modified 1st page (low power features)
Added STM32L15xC6 and STM32L15xR6 devices (32 Kbytes of
Flash memory).
Modified Section 3.6: GPIOs (general-purpose inputs/outputs) on
page 22
Modified Section 6.3: Operating conditions on page 53
Modified Table 55: ADC accuracy on page 96, Table 57: DAC
characteristics on page 100 and Table 60: Comparator 1
characteristics on page 103
6
Features: updated internal multispeed low power RC.
Table 2: Ultralow power STM32L15xx6/8/B device features and
peripheral counts: LCD 4x44 and 8x40 available for both 64- and
128-Kbyte devices; two comparators available for all devices.
Table 3: Functionalities depending on the operating power supply
range: added footnote 1.
Figure 8: STM32L15xCx UFQFPN48 pinout: replaced VFQPN48 by
UFQFPN48 as name of package.
Table 8: STM32L15xx6/8/B pin definitions: replaced PH0/PH1 by
PC14/PC15.
Table 9: Alternate function input/output: removed EVENT OUT from
PH2 port, AFIO15 column.
Table 19: Current consumption in Sleep mode: updated MSI
conditions and fHCLK.
Table 20: Current consumption in Low power run mode: updated
some temperature conditions; added footnote 2.
Table 21: Current consumption in Low power sleep mode: updated
some temperature conditions and one of the MSI clock conditions.
Table 22: Typical and maximum current consumptions in Stop
mode: updated IDD (WU from Stop) parameter.
Table 23: Typical and maximum current consumptions in Standby
mode: updated IDD (WU from Standby) parameter.
Table 25: Low-power mode wakeup timings: updated fHCLK value
for tWUSLEEP_LP; updated typical value of parameter “Wakeup from
Stop mode, regulator in Run mode”.
Table 24: Peripheral current consumption: replaced GPIOF by
GPIOH.
Table 33: PLL characteristics: updated “PLL output clock”
Table 35: Flash memory and data EEPROM characteristics:
updated all information for IDD.
Figure 19: I/O AC characteristics definition: replaced the falling
edge “tr(IO)out” by “tf(IO)out”.
Table 47: I2C characteristics: amended footnote 2.
Table 54: ADC characteristics: updated fS max value for direct
channels, 6-bit sampling rate.
Table 55: ADC accuracy: Updated the first, third and fourth fADC test
condition.
Table 59: Temperature sensor characteristics: updated typ, min,
and max values of the TS_temp parameter.
DocID17659 Rev 11
STM32L151x6/8/B, STM32L152x6/8/B
Revision history
Table 71. Document revision history (continued)
Date
26-Oct-2012
07-Feb-2013
Revision
Changes
7
Updated cover page.
Updated Section 3.10: ADC (analog-to-digital converter)
Updated Table 3: Functionalities depending on the operating power
supply range, added Table 4: CPU frequency range depending on
dynamic voltage scaling and Table 5: Working mode-dependent
functionalities (from Run/active down to standby).
Updated Table 27: Low-speed external user clock
characteristicsAdded footnote 2. in Table 14: Embedded reset and
power control block characteristics
Updated Table 22: Typical and maximum current consumptions in
Stop mode and Table 23: Typical and maximum current
consumptions in Standby mode
Updated footnote 4. in Table 22: Typical and maximum current
consumptions in Stop mode
Updated Table 44: I/O AC characteristics
Updated Table 47: I2C characteristics
Updated Table 49: SPI characteristics
Updated Section 6.3.9: Memory characteristics
Updated “non-robust” Table 54: ADC characteristics
Removed the note “position of 4.7 µf capacitor” in Section 6.1.6:
Power supply scheme
Updated Table 66: UFQFPN48 7 x 7 mm, 0.5 mm pitch, ultra thin
fine-pitch quad flat no-lead package mechanical data
Updated Table 65: LQFP48 7 x 7 mm, 48-pin low-profile quad flat
package mechanical data
Added the resistance of TFBGA in Table 69: Thermal characteristics
Added Figure 49: Thermal resistance
8
Removed AHB1/AHB2 in Figure 1: Ultralow power
STM32L15xx6/8/B block diagram
Added IWDG and WWDG rows in Table 5: Working modedependent functionalities (from Run/active down to standby).
Updated IDD (Supply current during wakeup time from Standby
mode) in Table 23: Typical and maximum current consumptions in
Standby mode
The comment "HSE = 16 MHz(2) (PLL ON for fHCLK above 16
MHz)" replaced by "fHSE = fHCLK up to 16 MHz included, fHSE =
fHCLK/2 above 16 MHz (PLL ON)(2)” in Table 19: Current
consumption in Sleep mode
Updated Stop mode current to 1.2 µA in Ultra-low-power platform
Updated entire Section 7: Package characteristics
Removed alternate function “I2C2_SMBA” for GPIO pin “PH2” in
Table 8: STM32L15xx6/8/B pin definitions
Updated Table 27: Low-speed external user clock characteristics
and definition of symbol “RAIN” in Table 54: ADC characteristics
Removed first sentence in I2C interface characteristics
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Revision history
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Table 71. Document revision history (continued)
Date
12-Nov-2013
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Revision
Changes
9
Changed voltage Range 1 minimum to 1.71 V and updated dynamic
voltage scaling range in Table 3: Functionalities depending on the
operating power supply range
Updated LCD and ADC features in Table 2: Ultralow power
STM32L15xx6/8/B device features and peripheral counts.
Updated Table 3: Functionalities depending on the operating power
supply range.
Updated Table 5: Working mode-dependent functionalities (from
Run/active down to standby).
Updated Figure 3: STM32L15xVx UFBGA100 ballout
Added Table 7: Legend/abbreviations used in the pinout table.
Updated Table 8: STM32L15xx6/8/B pin definitions
Updated Figure 10: Pin loading conditions and Figure 11: Pin input
voltage. Updated Figure 12: Power supply scheme.
Replaced “Σ” by “σ” in Section 6.1.1 and Section 6.1.2.
Updated Table 10: Voltage characteristics.
Updated Table 13: General operating conditions.
Added Section 6.1.7: Optional LCD power supply scheme.
Updated Table 16: Embedded internal reference voltage.
Added this Note in Section : High-speed external clock generated
from a crystal/ceramic resonator
Updated Section : Functional susceptibility to I/O current injection.
This Section 6.3.5: Wakeup time from Low power mode was
previously a paragraph in Section 6.3.4: Supply current
characteristics.
Updated fHSE conditions in Table 17: Current consumption in Run
mode, code with data processing running from Flash and Table 18:
Current consumption in Run mode, code with data processing
running from RAM. Fixed IDD unit in Table 23: Typical and
maximum current consumptions in Standby mode.
This Figure 15: High-speed external clock source AC timing
diagram was moved up (was previously after Figure 16: Low-speed
external clock source AC timing diagram.
Updated first sentence in Section 6.3.14: NRST pin characteristics.
Updated Table 25: Low-power mode wakeup timings title.
Updated Table 26: High-speed external user clock characteristics
Updated Table 28: HSE oscillator characteristics and Table 29: LSE
oscillator characteristics (fLSE = 32.768 kHz).
Updated Section 6.3.11: Electrical sensitivity characteristics title.
Updated Table 39: ESD absolute maximum ratings.
Updated Table 41: I/O current injection susceptibility and Table 42:
I/O static characteristics.
Updated Figure 21: I2C bus AC waveforms and measurement
circuit.
Removed any occurrence of “when 8 pins are sourced at same
time” in Table 43: Output voltage characteristics.
Updated section link in second paragraph of Section 6.3.15: TIM
timer characteristics.
DocID17659 Rev 11
STM32L151x6/8/B, STM32L152x6/8/B
Revision history
Table 71. Document revision history (continued)
Date
12-Nov-2013
22-Jul-2014
30-Jan-2015
Revision
Changes
Updated Table 54: ADC characteristics and Figure 27: Typical
connection diagram using the ADC.
Table 58: Temperature sensor calibration values was previously in
Section 3.10.1: Temperature sensor. Updated Table 59:
Temperature sensor characteristics.
In Table 61: Comparator 2 characteristics, parameter dThreshold/dt,
replaced any occurrence of “VREF+” by “VREFINT”Updated
Table 63: LQPF100 14 x 14 mm, 100-pin low-profile quad flat
package mechanical data, Table 64: LQFP64 10 x 10 mm 64-pin
low-profile quad flat package mechanical data, Table 65: LQFP48 7
x 7 mm, 48-pin low-profile quad flat package mechanical data and
Table 66: UFQFPN48 7 x 7 mm, 0.5 mm pitch, ultra thin fine-pitch
9
(continued) quad flat no-lead package mechanical data.
Updated Figure 33: LQFP100 recommended footprint.
Updated Figure 46: TFBGA64 - 5.0x5.0x1.2 mm, 0.5 mm pitch, thin
fine-pitch ball grid array package outline title.
Remove minimum and typical values of A dimension in Table 67:
UFBGA100 7 x 7 x 0.6 mm 0.5 mm pitch, ultra thin fine-pitch ball
grid array package mechanical data
Deleted second footnote in Figure 42: UFQFPN48 recommended
footprint.
Updated Section 8: Part numbering title and added first sentence.
Changed BOR disabled option identifier in Table 70: Ordering
information scheme.
10
Updated Figure 14, Figure 15.
Updated Table 5.
Updated Figure 6.3.4.
Updated note 5 inside Table 54.
Updated Ro value inside Table 54.
11
Updated DMIPS features in cover page and Section 2: Description.
Updated Table 8: STM32L151x6/8/B and STM32L152x6/8/B pin
definitions and Table 9: Alternate function input/output putting
additional functions.
Updated package top view marking in Section 7.1: Package
mechanical data.
Updated Figure 9: Memory map.
Updated Table 56: Maximum source impedance RAIN max adding
note 2.
Updated Table 70: Ordering information scheme.
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