STM8S datasheet(181/467 Pages) STMICROELECTRONICS

Nome de Peças	STM8S

Descrição Electrónicos	STM8S Series and STM8AF Series 8-bit microcontrollers

PDF	467 Pages

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Fabricante Electrônico	STMICROELECTRONICS [STMicroelectronics]

Página de início	http://www.st.com

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181 / 467 page

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RM0016

16-bit advanced control timer (TIM1)

261

Figure 76. Six-step generation, COM example (OSSR = 1)

17.5.8

Using the break function

The break function is often used in motor control. When using the break function, the output

enable signals and inactive levels are modified according to additional control bits (MOE,

OSSR and OSSI bits in the TIM1_BKR register).

When exiting from reset, the break circuit is disabled and the MOE bit is low. The break

function is enabled by setting the BKE bit in the TIM1_BKR register. The break input polarity

can be selected by configuring the BKP bit in the same register. BKE and BKP can be

modified at the same time.

Because MOE falling edge can be asynchronous, a resynchronization circuit has been

inserted between the actual signal (acting on the outputs) and the synchronous control bit

(accessed in the TIM1_BKR register). It results in some delays between the asynchronous

and the synchronous signals. For example, if MOE is written to 1 after it has been low, a

delay (dummy instruction) must be inserted before it can be read correctly.

STM8S Folha de dados(PDF) 181 Page - STMicroelectronics