STMicroelectronics STM32L151CB User manual

This is information on a product in full production.
July 2014 DocID17659 Rev 10 1/129
STM32L15xx6/8/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 factory-trimmed
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
– Up to 4 KB of true EEPROM with ECC
– 80 Byte Backup Register
•LCD Driver 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 timer, 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
LQFP100 14 × 14 mm
LQFP64 10 × 10 mm
LQFP48 7 × 7 mm
BGA100 7 × 7 mm
BGA64 5 × 5 mm
UFQFPN48
7 × 7 mm
www.st.com

Contents STM32L151x6/8/B, STM32L152x6/8/B
2/129 DocID17659 Rev 10
Contents
1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
2 Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
2.1 Device overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
2.2 Ultralow power device continuum . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11
2.2.1 Performance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
2.2.2 Shared peripherals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
2.2.3 Common system strategy . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
2.2.4 Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
3 Functional overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
3.1 Low power modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
3.2 ARM®Cortex®-M3 core with MPU . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
3.3 Reset and supply management . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
3.3.1 Power supply schemes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
3.3.2 Power supply supervisor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
3.3.3 Voltage regulator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
3.3.4 Boot modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
3.4 Clock management . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
3.5 Low power real-time clock and backup registers . . . . . . . . . . . . . . . . . . . 22
3.6 GPIOs (general-purpose inputs/outputs) . . . . . . . . . . . . . . . . . . . . . . . . . 22
3.7 Memories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
3.8 DMA (direct memory access) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
3.9 LCD (liquid crystal display) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
3.10 ADC (analog-to-digital converter) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
3.10.1 Temperature sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
3.10.2 Internal voltage reference (VREFINT) . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
3.11 DAC (digital-to-analog converter) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
3.12 Ultralow power comparators and reference voltage . . . . . . . . . . . . . . . . . 25
3.13 Routing interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
3.14 Touch sensing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
3.15 Timers and watchdogs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

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STM32L151x6/8/B, STM32L152x6/8/B Contents
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3.15.1 General-purpose timers (TIM2, TIM3, TIM4, TIM9, TIM10 and TIM11) . 27
3.15.2 Basic timers (TIM6 and TIM7) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
3.15.3 SysTick timer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
3.15.4 Independent watchdog (IWDG) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
3.15.5 Window watchdog (WWDG) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
3.16 Communication interfaces . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
3.16.1 I²C bus . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
3.16.2 Universal synchronous/asynchronous receiver transmitter (USART) . . 28
3.16.3 Serial peripheral interface (SPI) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
3.16.4 Universal serial bus (USB) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
3.17 CRC (cyclic redundancy check) calculation unit . . . . . . . . . . . . . . . . . . . 29
3.18 Development support . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
4 Pin descriptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
5 Memory mapping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
6 Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
6.1 Parameter conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
6.1.1 Minimum and maximum values . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
6.1.2 Typical values . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
6.1.3 Typical curves . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
6.1.4 Loading capacitor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
6.1.5 Pin input voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
6.1.6 Power supply scheme . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
6.1.7 Optional LCD power supply scheme . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
6.1.8 Current consumption measurement . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
6.2 Absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
6.3 Operating conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
6.3.1 General operating conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
6.3.2 Embedded reset and power control block characteristics . . . . . . . . . . . 52
6.3.3 Embedded internal reference voltage . . . . . . . . . . . . . . . . . . . . . . . . . . 54
6.3.4 Supply current characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
6.3.5 Wakeup time from Low power mode . . . . . . . . . . . . . . . . . . . . . . . . . . . 67
6.3.6 External clock source characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . 68
6.3.7 Internal clock source characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . 73
6.3.8 PLL characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75

Contents STM32L151x6/8/B, STM32L152x6/8/B
4/129 DocID17659 Rev 10
6.3.9 Memory characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76
6.3.10 EMC characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77
6.3.11 Electrical sensitivity characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . 79
6.3.12 I/O current injection characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . 79
6.3.13 I/O port characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81
6.3.14 NRST pin characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 84
6.3.15 TIM timer characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 85
6.3.16 Communication interfaces . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 86
6.3.17 12-bit ADC characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 92
6.3.18 DAC electrical specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 98
6.3.19 Temperature sensor characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . 100
6.3.20 Comparator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 101
6.3.21 LCD controller (STM32L152xx only) . . . . . . . . . . . . . . . . . . . . . . . . . . 103
7 Package characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 104
7.1 Package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 104
7.2 Thermal characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .119
7.2.1 Reference document . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 120
8 Part numbering . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 121
9 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 122

DocID17659 Rev 10 5/129
STM32L151x6/8/B, STM32L152x6/8/B List of tables
6
List of tables
Table 1. Device summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Table 2. Ultralow power STM32L15xx6/8/B device features and peripheral counts. . . . . . . . . . . . . 10
Table 3. Functionalities depending on the operating power supply range . . . . . . . . . . . . . . . . . . . . 14
Table 4. CPU frequency range depending on dynamic voltage scaling . . . . . . . . . . . . . . . . . . . . . . 15
Table 5. Working mode-dependent functionalities (from Run/active down to standby) . . . . . . . . . . 16
Table 6. Timer feature comparison. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Table 7. Legend/abbreviations used in the pinout table . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
Table 8. STM32L15xx6/8/B pin definitions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
Table 9. Alternate function input/output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
Table 10. Voltage characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
Table 11. Current characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
Table 12. Thermal characteristics. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
Table 13. General operating conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
Table 14. Embedded reset and power control block characteristics. . . . . . . . . . . . . . . . . . . . . . . . . . 52
Table 15. Embedded internal reference voltage calibration values . . . . . . . . . . . . . . . . . . . . . . . . . . 54
Table 16. Embedded internal reference voltage. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
Table 17. Current consumption in Run mode, code with data processing running from Flash. . . . . . 56
Table 18. Current consumption in Run mode, code with data processing running from RAM . . . . . . 57
Table 19. Current consumption in Sleep mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58
Table 20. Current consumption in Low power run mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60
Table 21. Current consumption in Low power sleep mode. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61
Table 22. Typical and maximum current consumptions in Stop mode . . . . . . . . . . . . . . . . . . . . . . . . 62
Table 23. Typical and maximum current consumptions in Standby mode . . . . . . . . . . . . . . . . . . . . . 64
Table 24. Peripheral current consumption . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65
Table 25. Low-power mode wakeup timings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67
Table 26. High-speed external user clock characteristics. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68
Table 27. Low-speed external user clock characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69
Table 28. HSE oscillator characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70
Table 29. LSE oscillator characteristics (fLSE = 32.768 kHz) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71
Table 30. HSI oscillator characteristics. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73
Table 31. LSI oscillator characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73
Table 32. MSI oscillator characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74
Table 33. PLL characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75
Table 34. RAM and hardware registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76
Table 35. Flash memory and data EEPROM characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76
Table 36. Flash memory, data EEPROM endurance and data retention . . . . . . . . . . . . . . . . . . . . . . 77
Table 37. EMS characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77
Table 38. EMI characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 78
Table 39. ESD absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 79
Table 40. Electrical sensitivities . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 79
Table 41. I/O current injection susceptibility . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 80
Table 42. I/O static characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81
Table 43. Output voltage characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82
Table 44. I/O AC characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83
Table 45. NRST pin characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 84
Table 46. TIMx characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 85
Table 47. I2C characteristics. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 86
Table 48. SCL frequency (fPCLK1= 32 MHz, VDD = VDD_I2C = 3.3 V). . . . . . . . . . . . . . . . . . . . . . . . 87

List of tables STM32L151x6/8/B, STM32L152x6/8/B
6/129 DocID17659 Rev 10
Table 49. SPI characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 88
Table 50. USB startup time. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 90
Table 51. USB DC electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 91
Table 52. USB: full speed electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 91
Table 53. ADC clock frequency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 92
Table 54. ADC characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 92
Table 55. ADC accuracy. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 94
Table 56. RAIN max for fADC = 16 MHz . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 96
Table 57. DAC characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 98
Table 58. Temperature sensor calibration values. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100
Table 59. Temperature sensor characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100
Table 60. Comparator 1 characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 101
Table 61. Comparator 2 characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 102
Table 62. LCD controller characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 103
Table 63. LQPF100 14 x 14 mm, 100-pin low-profile quad flat package
mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 106
Table 64. LQFP64 10 x 10 mm 64-pin low-profile quad flat package mechanical data . . . . . . . . . . 109
Table 65. LQFP48 7 x 7 mm, 48-pin low-profile quad flat package mechanical data. . . . . . . . . . . . 111
Table 66. UFQFPN48 7 x 7 mm, 0.5 mm pitch, ultra thin fine-pitch quad flat no-lead
package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 113
Table 67. UFBGA100 7 x 7 x 0.6 mm 0.5 mm pitch, ultra thin fine-pitch ball grid array
package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 114
Table 68. TFBGA64 5.0x5.0x1.2 mm, 0.5 mm pitch thin fine-pitch ball grid array
package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 116
Table 69. Thermal characteristics. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 119
Table 70. Ordering information scheme . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 121
Table 71. Document revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 122

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STM32L151x6/8/B, STM32L152x6/8/B List of figures
7
List of figures
Figure 1. Ultralow power STM32L15xx6/8/B block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Figure 2. Clock tree . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Figure 3. STM32L15xVx UFBGA100 ballout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Figure 4. STM32L15xVx LQFP100 pinout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Figure 5. STM32L15xRx TFBGA64 ballout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Figure 6. STM32L15xRx LQFP64 pinout. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Figure 7. STM32L15xCx LQFP48 pinout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Figure 8. STM32L15xCx UFQFPN48 pinout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Figure 9. Memory map. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
Figure 10. Pin loading conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
Figure 11. Pin input voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
Figure 12. Power supply scheme. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
Figure 13. Optional LCD power supply scheme . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
Figure 14. Current consumption measurement scheme . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
Figure 15. High-speed external clock source AC timing diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68
Figure 16. Low-speed external clock source AC timing diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69
Figure 17. HSE oscillator circuit diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71
Figure 18. Typical application with a 32.768 kHz crystal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72
Figure 19. I/O AC characteristics definition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 84
Figure 20. Recommended NRST pin protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 85
Figure 21. I2C bus AC waveforms and measurement circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 87
Figure 22. SPI timing diagram - slave mode and CPHA = 0 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 89
Figure 23. SPI timing diagram - slave mode and CPHA = 1(1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 89
Figure 24. SPI timing diagram - master mode(1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 90
Figure 25. USB timings: definition of data signal rise and fall time . . . . . . . . . . . . . . . . . . . . . . . . . . . 91
Figure 26. ADC accuracy characteristics. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 95
Figure 27. Typical connection diagram using the ADC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 95
Figure 28. Maximum dynamic current consumption on VREF+ supply pin during ADC
conversion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 96
Figure 29. Power supply and reference decoupling (VREF+ not connected to VDDA). . . . . . . . . . . . . . 97
Figure 30. Power supply and reference decoupling (VREF+ connected to VDDA). . . . . . . . . . . . . . . . . 97
Figure 31. 12-bit buffered /non-buffered DAC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100
Figure 32. LQFP100 14 x 14 mm, 100-pin low-profile quad flat package outline . . . . . . . . . . . . . . . 105
Figure 33. Recommended footprint . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 107
Figure 34. LQFP64 10 x 10 mm, 64-pin low-profile quad flat package outline . . . . . . . . . . . . . . . . . 108
Figure 35. Recommended footprint . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 109
Figure 36. LQFP48 7 x 7 mm, 48-pin low-profile quad flat package outline . . . . . . . . . . . . . . . . . . . 110
Figure 37. Recommended footprint . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 111
Figure 38. UFQFPN48 7 x 7 mm 0.5 mm pitch, ultra thin fine-pitch quad flat no-lead
package outline. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 112
Figure 39. Recommended footprint . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 113
Figure 40. UFBGA100 7 x 7 x 0.6 mm 0.5 mm pitch, ultra thin fine-pitch ball grid array
package outline. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 114
Figure 41. TFBGA64 - 5.0x5.0x1.2 mm, 0.5 mm pitch, thin fine-pitch ball grid array
package outline. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 116
Figure 42. Recommended PCB design rules for pads (0.5 mm pitch BGA) . . . . . . . . . . . . . . . . . . . 118
Figure 43. Thermal resistance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 120

Introduction STM32L151x6/8/B, STM32L152x6/8/B
8/129 DocID17659 Rev 10
1 Introduction
This datasheet provides the ordering information and mechanical device characteristics of
the STM32L151x6/8/B and STM32L152x6/8/B ultralow power ARM®Cortex®-M3 based
microcontrollers product line.
The ultralow power STM32L15xx6/8/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 ultralow power STM32L15xx6/8/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 STM32L1xxx hardware development” AN3216 gives a
hardware implementation overview. Both documents are available from the
STMicroelectronics website www.st.com.
For information on the 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.

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STM32L151x6/8/B, STM32L152x6/8/B Description
46
2 Description
The ultralow power STM32L15xx6/8/B incorporates 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 ultralow power comparators, six general-
purpose 16-bit timers and two basic timers, which can be used as time bases.
Moreover, the STM32L15xx6/8/B devices contain standard and advanced communication
interfaces: up to two I2Cs and SPIs, three USARTs and a USB.The STM32L15xx6/8/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 has a built-in LCD voltage generator that allows you to
drive up to 8 multiplexed LCDs with contrast independent of the supply voltage.
The ultralow power STM32L15xx6/8/B operates 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.

Description STM32L151x6/8/B, STM32L152x6/8/B
10/129 DocID17659 Rev 10
2.1 Device overview
Table 2. Ultralow power STM32L15xx6/8/B device features and peripheral counts
Peripheral STM32L15xCx STM32L15xRx STM32L15xVx
Flash (Kbytes) 32 64 128 32 64 128 64 128
Data EEPROM (Kbytes) 4
RAM (Kbytes) 10 10 16 10 10 16 10 16
Timers
General-
purpose 6
Basic 2
Communication
interfaces
SPI 2
I2C2
USART 3
USB 1
GPIOs 37 51 83
12-bit synchronized ADC
Number of channels
1
14 channels
1
20 channels
1
24 channels
12-bit DAC
Number of channels
2
2
LCD (STM32L152xx Only)
COM x SEG 4x18 4x32
8x28
4x44
8x40
Comparator 2
Capacitive sensing channels 13 20
Max. CPU frequency 32 MHz
Operating voltage 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
Operating temperatures Ambient temperatures: –40 to +85 °C
Junction temperature: –40 to + 105 °C
Packages LQFP48, UFQFPN48 LQFP64, BGA64 LQFP100, BGA100