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SH7018 Datasheet(PDF) 205 Page - Renesas Technology Corp |
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SH7018 Datasheet(HTML) 205 Page - Renesas Technology Corp |
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205 / 431 page  189 Section 11 Watchdog Timer (WDT) 11.1 Overview The watchdog timer (WDT) is a 1-channel timer for monitoring system operations. If the WDT overflows without being rewritten correctly by the CPU due to system runaway or the like, it can generate an internal reset signal for the chip. When the watchdog function is not needed, the WDT can be used as an interval timer. In the interval timer operation, an interval timer interrupt is generated at each counter overflow. The WDT is also used in recovering from the standby mode. 11.1.1 Features • Works in watchdog timer mode or interval timer mode. • If the counter overflows in the watchdog timer mode, WDT can generate an internal reset signal for the chip. • Generates interrupts in the interval timer mode. When the counter overflows, it generates an interval timer interrupt. • Clears standby mode. • Works with eight counter input clocks. |
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