ST9 datasheet(70/146 Pages) STMICROELECTRONICS

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ST9 数据表(PDF) 70 Page - STMicroelectronics

部件名	ST9

功能描述	USER GUIDE

PDF	146 Pages

Scroll/Zoom	100%

制造商	STMICROELECTRONICS [STMicroelectronics]

网页	http://www.st.com

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70 / 146 page

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ST9 USER GUIDE

4.3.1.3 Retriggerable Input Mode

The counter value is decremented by WDTCLK (INTCLK / 4) if ST_SP is high.

The initial value is reloaded either at the rising edge of ST_SP or at each falling edge of the

WDTIN pin if ST_SP is high.

Figure 30

. Timer in Retriggerable Input Mode

4.3.1.4 Triggerable Input Mode

The counter value is decremented by WDTCLK (INTCLK / 4) if ST_SP is high and falling edge

of WDTIN occurs.

The initial value is reloaded at the first falling edge of the WDTIN pin if ST_SP is high.

Figure 31

. Timer in Triggerable Input Mode

Initial Value

WDTIN Pin

ST_SP

Counter

Value

Counter

Value

Initial Value

ST_SP

WDTIN Pin

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