This is information on a product in full production.

July 2018 DS7204 Rev 11 1/123

STM8L151C2/K2/G2/F2

STM8L151C3/K3/G3/F3

8-bit ultra-low-power MCU, up to 8 KB Flash, up to 256 bytes data

EEPROM, RTC, timers, USART, I2C, SPI, ADC, comparators

Datasheet - production data

Features

• Operating conditions

– Operating power supply: 1.65 to 3.6 V

(without BOR), 1.8 to 3.6 V (with BOR)

– Te mperature range: -40 to 85 or 125 °C

• Low power features

– 5 low-power modes: Wait, Low power run,

Low-power wait, Active-halt with RTC, Halt

– Ultra-low leakage per I/0: 50 nA

– Fast wakeup from Halt: 5 µs

• Advanced STM8 core

– Harvard archite ctu r e an d 3- sta g e pipelin e

– Max freq: 16 MHz, 16 CISC MIPS peak

– Up to 40 external interrupt sources

• Reset and supply management

– Low-power, ultra safe BOR reset with 5

selectable thresholds

– Ultra-low po wer POR/PDR

– Programmable voltage detector (PVD)

• Clock management

– 32 kHz and 1-16 MHz crystal oscillators

– Internal 16 MHz factory-trimmed RC

– Internal 38 kHz low consumption RC

– Clock security system

• Low power RTC

– BCD calendar with alarm interrupt

– Digital calibration with +/- 0.5 ppm accuracy

– LSE security system

– Auto-wakeup from Halt w/ periodic interrupt

• Memories

– Up to 8 Kbyte of Fla sh program memo ry

plus 256 byte of data EEPROM with ECC

– Flexible write/read protection modes

– 1 Kbyte of RAM

• DMA

– 4 channels supporting ADC, SPI, I

USART, timers

– 1 channel for memory-to-memory

• 12-bit ADC up to 1 Msps/28 channels

– Temp. sensor and internal ref. voltage

• 2 ultra-low-power comparators

– 1 with fixed thresh ol d and 1 rail to rail

– Wakeup capability

• Timers

– Two 16-bit timers with 2 channels (IC, OC,

PWM), quadrature encoder (TIM2, TIM3)

– One 8-bit timer with 7-bit prescaler (TIM4)

– 1 Window and 1 independent watchdog

– Beeper timer with 1, 2 or 4 kHz frequencies

• Communication interfaces

– One synchronous serial interface (SPI)

–Fast I

C 400 kHz

– One USART

• Up to 41 I/Os, all mappable on interrupt vectors

• Up to 20 capacitive sensing channels

supporting touchkey, proximity touch, linear

touch, and rotary touch sensors

• Development su pp or t

– Fast on-chip programming and non-

intrusive debugging with SWIM

– Bootloader using USART

• 96-bit unique ID

LQFP48 (7x7 mm)

UFQFPN32 (5x5 mm)

UFQFPN28 (4x4 mm)

UFQFPN20 (3x3 mm)

TSSOP20 (6.4x4.4 mm)

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Contents STM8L151x2, STM8L151x3

2/123 DS7204 Rev 11

Contents

1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

2 Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

2.1 Device overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

2.2 Ultra-low-power continuum . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

3 Functional overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

3.1 Low-power modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

3.2 Central processing unit STM8 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

3.2.1 Advanced STM8 Core . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

3.2.2 Interrupt controller . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

3.3 Reset and supply management . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

3.3.1 Power supply scheme . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

3.3.2 Power supply supervisor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

3.3.3 Voltage regulator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

3.4 Clock management . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

3.5 Low power real-time clock . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

3.6 Memories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

3.7 DMA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

3.8 Analog-to-digital converter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

3.9 Ultra-low-power comparators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

3.10 System configuration controller and routing interface . . . . . . . . . . . . . . . 21

3.11 Touch sensing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

3.12 Timers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

3.12.1 16-bit general purpose timers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

3.12.2 8-bit basic timer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

3.13 Watchdog timers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

3.13.1 Window watchdog timer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

3.13.2 Independent watchdog timer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

3.14 Beeper . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

3.15 Communication interfaces . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

3.15.1 SPI . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23