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STM8AL3L46 Datasheet(PDF) 19 Page - STMicroelectronics |
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STM8AL3L46 Datasheet(HTML) 19 Page - STMicroelectronics |
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19 / 124 page  DocID18474 Rev 7 19/124 STM8AL313x/4x/6x STM8AL3L4x/6x Functional overview 54 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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