STM8L151C4 STMicroelectronics, STM8L151C4 Datasheet - Page 20

• Manufacturer Part Number: STM8L151C4
• Description: STM8L-Ultra Low Power-8 bits Microcontrollers
• Manufacturer: STMicroelectronics

Specifications of STM8L151C4

• Temp. Range: - 40 °C to 85, 105 or 125 °C
• 5 Low Power Modes: Wait, Low power run (5.1 μA), Low power wait (3 μA), Active-halt with full RTC (1.3 μA), Halt (350 nA)
• Consumption: 195 μA/MHz+440μA
• Ultralow Leakage Per I/0: 50 nA
• Fast Wakeup From Halt: 4.7 μs
• Lcd: up to 4x28 segments w/ step-up converter
• 4 Channels; Supported Peripherals: ADC, DAC, SPI, I2C, USART, timers
• 2 Watchdogs: 1 Window, 1 Independent

Functional overview
3.10
Note:
3.11
3.12
3.13
20/126
Digital-to-analog converter (DAC)
DAC can be served by DMA1.
Ultra-low-power comparators
The medium-density STM8L15x embeds two comparators (COMP1 and COMP2) sharing
the same current bias and voltage reference. The voltage reference can be internal or
external (coming from an I/O).
The two comparators can be used together to offer a window function. They can wake up
from Halt mode.
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 V
provides a set of registers for efficiently managing the charge transfer acquisition sequence
(Section 3.13:
Touchsensing
Medium density STM8L15xxx devices provide a simple solution for adding capacitive
sensing functionality to any application. Capacitive sensing technology is able to detect
finger presence near an electrode which is protected from direct touch by a dielectric
(example, glass, plastic). The capacitive variation introduced by a finger (or any conductive
object) is measured using a proven implementation based on a surface charge transfer
acquisition principle. It consists of charging the electrode capacitance and then transferring
a part of the accumulated charges into a sampling capacitor until the voltage across this
capacitor has reached a specific threshold. In Medium density STM8L15xxx devices, the
acquisition sequence is managed by software and it involves analog I/O groups and the
routing interface.
12-bit DAC with output buffer
Synchronized update capability using TIM4
DMA capability
External triggers for conversion
Input reference voltage V
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 submultiple (1/4, 1/2, 3/4)
Touchsensing).
REF+
Doc ID 15962 Rev 9
for better resolution
STM8L151xx, STM8L152xx
REFINT
. It also