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ST7MC2S6-Auto データシート(PDF) 88 Page - STMicroelectronics |
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ST7MC2S6-Auto データシート(HTML) 88 Page - STMicroelectronics |
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88 / 371 page  Obsolete Product(s) - Obsolete Product(s) On-chip peripherals ST7MC1K2-Auto, ST7MC1K6-Auto, ST7MC2S4-Auto, ST7MC2S6-Auto 88/371 Note: The T6 bit can be used to generate a software reset (the WDGA bit is set and the T6 bit is cleared). Watchdog reset on HALT option If the watchdog is activated and the watchdog reset on halt option is selected, then the HALT instruction generates a reset. 10.1.4 Using Halt mode with the watchdog If Halt mode with watchdog is enabled by option byte (no watchdog reset on HALT instruction), it is recommended before executing the HALT instruction to refresh the WDG counter, to avoid an unexpected WDG reset immediately after waking up the microcontroller. 10.1.5 How to program the watchdog timeout Figure 31 shows the linear relationship between the 6-bit value to be loaded in the watchdog counter (CNT) and the resulting timeout duration in milliseconds. This can be used for a quick calculation without taking the timing variations into account. If more precision is needed, use the formulae in Figure 32. Caution: When writing to the WDGCR register, always write 1 in the T6 bit to avoid generating an immediate reset. Figure 31. Approximate timeout duration Watchdog timeout (ms) @ 8 MHz fOSC2 3F 00 38 128 1.5 65 30 28 20 18 10 08 50 34 18 82 98 114 Obsolete Product(s) - Obsolete Product(s) |
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