STM8S103C2P6 View Datasheet(PDF) - STMicroelectronics

Part Name

Description

Manufacturer

STM8S103C2P6

Access line, STM8S 8-bit MCU, up to 32 Kbytes Flash, 10-bit ADC, timers, USART, SPI, I²C

STMicroelectronics 

STM8S103xx, STM8S105xx

Figure 4. Flash memory organisation (STM8S103)

Up to

8 Kbytes

Flash

program

memory

UBC area

Remains write protected during IAP

Program memory area

Write access possible for IAP

Product overview

Programmable area from 128 bytes

(2 first pages) up to 8 Kbytes

(1 page steps)

Read-out protection (ROP)

The read-out protection blocks reading and writing the Flash program memory in debug

mode. Once the read-out protection is activated, any attempt to toggle its status triggers a

global erase of the program and data memory. Even if no protection can be considered as

totally unbreakable, the feature provides a very high level of protection for a general purpose

microcontroller.

4.5

Clock controller

The clock controller distributes the system clock (fMASTER) coming from different oscillators

to the core and the peripherals. It also manages clock gating for low power modes and

ensures clock robustness.

Features

● Clock prescaler: to get the best compromise between speed and current consumption

the clock frequency to the CPU and peripherals can be adjusted by a programmable

prescaler

● Safe clock switching: Clock sources can be changed safely on the fly in run mode

through a configuration register. The clock signal is not switched until the new clock

source is ready. The design guarantees glitch-free switching.

● Clock management: To reduce power consumption, the clock controller can stop the

clock to the core, individual peripherals or memory.

● Master clock sources: 4 different clock sources can be used to drive the master clock:

– 1-16 MHz High Speed External crystal (HSE)

– Up to 16 MHz High Speed user-external clock (HSE user-ext)

– 16 MHz High Speed Internal RC oscillator (HSI)

– 128 kHz Low Speed Internal RC (LSI)

● Startup clock: After reset, the microcontroller restarts by default with an internal 2

MHz clock (HSI/8). The prescaler ratio and clock source can be changed by the

application program as soon as the code execution starts.

● Clock security system (CSS): This feature can be enabled by software. If an HSE

clock failure occurs, the internal RC (16 MHz/8) is automatically selected by the CSS

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