STM8AL31E8X Datasheet, PDF (20/133 Pages) STMicroelectronics – Automotive 8-bit ultra-low-power MCU, 64 KB Flash, EEPROM, RTC, AES, LCD, timers, USARTs, I2C, SPIs, ADC, DAC, COMPs

Functional overview
STM8AL31E8x STM8AL3LE8x
3.6
Note:
LCD (Liquid crystal display)
The LCD is only available on STM8AL3LE8x devices.
The liquid crystal display drives up to 8 common terminals and up to 40 segment terminals
to drive up to 320 pixels. This LCD is configurable to drive up to 4 common and 44
segments (up to 176 pixels).
• Internal step-up converter to guarantee contrast control whatever V_DD.
• Static 1/2, 1/3, 1/4, 1/8 duty supported.
• Static 1/2, 1/3, 1/4 bias supported.
• Phase inversion to reduce power consumption and EMI.
• Up to 8 pixels programmable to blink.
• The LCD controller operating in Halt mode.
Unnecessary segments and common pins can be used as general I/O pins.
3.7
Memories
The high-density STM8AL3xE8x devices have the following main features:
• 4 Kbytes of RAM
• The non-volatile memory is divided into three arrays:
– 64 Kbytes of medium-density embedded Flash program memory
– 2 Kbytes of Data EEPROM
– Option byte.
The memory 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, DAC1,DAC2, AES, I2C1, SPI1, SPI2, USART1,
USART2, USART3, and the 5 Timers.
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DocID027180 Rev 5