STM8AL3136 datasheet(19/124 Pages) STMICROELECTRONICS

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STM8AL313x/4x/6x STM8AL3L4x/6x

Functional overview

3.6

LCD (Liquid crystal display)

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

terminals to drive up to 112 pixels.

•

Internal step-up converter to guarantee contrast control whatever VDD.

•

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 STM8AL313x/4x/6x and STM8AL3L4x/6x 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 Kbytes of Data EEPROM

–

Option bytes.

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 4 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 fSYSCLK= 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.

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