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ST72321BXXX-AUTO Datasheet(PDF) 97 Page - STMicroelectronics

Part # ST72321BXXX-AUTO
Description  8-bit MCU for automotive with 32 to 60 Kbyte Flash/ROM, ADC, 5 timers, SPI, SCI, I2C interface
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

ST72321BXXX-AUTO Datasheet(HTML) 97 Page - STMicroelectronics

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ST72321Bxxx-Auto
PWM auto-reload timer (ART)
97/247
12.2.9
External interrupt capability
This mode allows the input capture capabilities to be used as external interrupt sources. The
interrupts are generated on the edge of the ARTICx signal.
The edge sensitivity of the external interrupts is programmable (CSx bit of ARTICCSR
register) and they are independently enabled through CIEx bits of the ARTICCSR register.
After fetching the interrupt vector, the CFx flags can be read to identify the interrupt source.
During Halt mode, the external interrupts can be used to wake up the micro (if the CIEx bit is
set).
Figure 40.
Input capture timing diagram
04h
COUNTER
t
01h
fCOUNTER
xxh
02h
03h
05h
06h
07h
04h
ARTICx PIN
CFx FLAG
ICRx REGISTER
INTERRUPT


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