Datasheet

DocID15962 Rev 13 19/131

STM8L151xx, STM8L152xx Functional overview

3.6 LCD (Liquid crystal display)

The liquid crystal display drives up to 4 common terminals and up to 28 segment terminals

to drive up to 112 pixels.

 Internal step-up converter to guarantee contrast control whatever V

 Static 1/2, 1/3, 1/4 duty supported.

 Static 1/2, 1/3 bias supported.

 Phase inversion to reduce power consumption and EMI.

 Up to 4 pixels which can programmed to blink.

 The LCD controller can operate in Halt mode.

Note: Unnecessary segments and common pins can be used as general I/O pins.

3.7 Memories

The medium density STM8L15x devices have the following main features:

 Up to 2 Kbytes of RAM

 The non-volatile memory is divided into three arrays:

– Up to 32 Kbytes of medium-density embedded Flash program memory

– 1 Kbyte of data EEPROM

– Option bytes.

The EEPROM embeds the error correction code (ECC) feature. It supports the read-while-

write (RWW): it is possible to execute the code from the program matrix while

programming/erasing the data matrix.

The option byte protects part of the Flash program memory from write and readout piracy.

3.8 DMA

A 4-channel direct memory access controller (DMA1) offers a memory-to-memory and

peripherals-from/to-memory transfer capability. The 4 channels are shared between the

following IPs with DMA capability: ADC1, DAC, I2C1, SPI1, USART1, the four Timers.

3.9 Analog-to-digital converter

 12-bit analog-to-digital converter (ADC1) with 25 channels (including 1 fast channel),

temperature sensor and internal reference voltage

 Conversion time down to 1 µs with f

SYSCLK

= 16 MHz

 Programmable resolution

 Programmable sampling time

 Single and continuous mode of conversion

 Scan capability: automatic conversion performed on a selected group of analog inputs

 Analog watchdog

 Triggered by timer

Note: ADC1 can be served by DMA1.