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STM8AL3138 Datasheet(PDF) 20 Page - STMicroelectronics

No. de pieza STM8AL3138
Descripción Electrónicos  Automotive 8-bit ultra-low-power MCU, up to 32 Kbyte Flash, RTC, data EEPROM, LCD, timers, USART, I2C, SPI, ADC, DAC, COMPs
PDF  124 Pages
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Fabricante Electrónico  STMICROELECTRONICS [STMicroelectronics]
Página de inicio  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

STM8AL3138 Datasheet(HTML) 20 Page - STMicroelectronics

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Functional overview
STM8AL313x/4x/6x STM8AL3L4x/6x
20/124
DocID18474 Rev 7
3.10
Digital-to-analog converter (DAC)
•
12-bit DAC with output buffer
•
Synchronized update capability using TIM4
•
DMA capability
•
External triggers for conversion
•
Input reference voltage VREF+ for better resolution
Note:
DAC can be served by DMA1.
3.11
Ultra-low-power comparators
The medium-density STM8AL313x/4x/6x and STM8AL3L4x/6x embed two comparators
(COMP1 and COMP2) that share the same current bias and voltage reference. The voltage
reference can be internal or external (coming from an I/O).
•
One comparator with fixed threshold (COMP1).
•
One comparator rail to rail with fast or slow mode (COMP2). The threshold can be one
of the following:
–
DAC output,
–
External I/O,
–
Internal reference voltage or internal reference voltage sub multiple (1/4, 1/2, 3/4).
The two comparators can be used together to offer a window function. They can wake up
from Halt mode.
3.12
System configuration controller and routing interface
The system configuration controller provides the capability to remap some alternate
functions on different I/O ports. TIM4 and ADC1 DMA channels can also be remapped.
The highly flexible routing interface allows application software to control the routing of
different I/Os to the TIM1 timer input captures. It also controls the routing of internal analog
signals to ADC1, COMP1, COMP2, DAC and the internal reference voltage VREFINT. It also
provides a set of registers for efficiently managing the charge transfer acquisition sequence
(see Section 3.13: Timers).



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