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전자부품 데이터시트 검색엔진 |
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전자부품 데이터시트 검색엔진 |
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ST9 데이터시트(PDF) 68 Page - STMicroelectronics |
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ST9 데이터시트(HTML) 68 Page - STMicroelectronics |
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68 / 146 page  68/146 ST9 USER GUIDE 4.3 STANDARD AND WATCHDOG TIMERS You can use this timer both as a regular timer and as a watchdog timer. 4.3.1 Description The block diagram of the Watchdog Timer is the following: Figure 27 . Watchdog Timer Simplified Block Diagram In Counter/Timer mode, the WDT can count pulses coming either from an input pin (WDIN; in the ST92F150, alternate function of P5.3) or from the internal clock divided by 4. When the in- ternal clock is used, the external pin, if enabled, can either gate the clock, start the counter, or WDIN Pin Input Modes and Clock Control Logic Prescaler (8-bit) 16-bit Downcounter Output Control Logic Reset and Interrupt Control Logic Reset and interrupt request to the core INTCLK/4 3 bits of WDTCR 2 bits of WDTCR 3 bits of WDTCR 1 bit of WCR WDOUT Pin INT0 Pin NMI Pin 2 bits of EIVR A detailed block diagram is provided in Section 7 |
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