UM1574 datasheet(27/48 Pages) STMICROELECTRONICS

27 / 48 page

UM1574

Hardware and layout

Doc ID 023645 Rev 1

27/48

Figure 15.

STM8AL3L68T MCU block diagram

Legend:

ADC: Analog-to-Digital Converter

BOR: Brownout Reset

DMA: Direct Memory Access

DAC: Digital-to-Analog Converter

I²C: Inter-Integrated Circuit multimaster interface

IWDG: Independent WatchDoG

LCD: Liquid Crystal Display

POR/PDR: Power On Reset / Power Down Reset

RTC: Real-Time Clock

SPI: Serial Peripheral Interface

SWIM: Single Wire Interface Module

USART: Universal Synchronous Asynchronous Receiver Transmitter

WWDG: Window WatchDoG

16 MHz internal RC

Clock

Clocks

Debug module

SPI1

32 Kbytes

Interrupt controller

2 Kbytes RAM

to core and

peripherals

IWDG

(38 kHz clock)

(SWIM)

Port A

Port B

Port C

I²C1

USART1

Power

VOLT. REG.

Port F

1-16 MHz oscillator

32 kHz oscillator

38 kHz internal RC

LCD driver

4x28

WWDG

STM8 Core

controller

and

CSS

1 Kbyte

Port D

Port E

Beeper

RTC

memory

Program

Data EEPROM

@VDD

VDD18

VDD1 =1.65 V

VSS1

SWIM

SCL, SDA,

MOSI, MISO,

SCK, NSS

RX, TX, CK

ADC1_INx

DAC_OUT

COMP1_INP

COMP 1

COMP 2

COMP2_INP

VDDA

VSSA

SMB

@VDDA/VSSA

Temp sensor

12-bit ADC1

VREF+

VREF-

3.6 V

12-bit DAC

NRST

PA[7:0]

PB[7:0]

PC[7:0]

PD[7:0]

PE[7:0]

PF0

BEEP

ALARM, CALIB

SEGx, COMx

POR/PDR

OSC_IN,

OSC_OUT

OSC32_IN,

OSC32_OUT

BOR

PVD

PVD_IN

RESET

DMA1

8-bit Timer 4

16-bit Timer 3

16-bit Timer 2

16-bit Timer 1

(4 channels)

2 channels

3 channels

COMP2_INM

VLCD = 2.5 V

3.6 V

LCD booster

Internal reference

voltage

VREFINT out

VREF+

Infrared interface

IR_TIM

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