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数据搜索系统，热门电子元器件搜索 |
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AT90SCR100 数据表(PDF) 55 Page - ATMEL Corporation |
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AT90SCR100 数据表(HTML) 55 Page - ATMEL Corporation |
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55 / 433 page  55 TPR0327AY–SMS–30Jan09 AT90SCR100 Figure 9-5. Brown-out Reset During Operation 9.2.4 Watchdog Reset When the Watchdog times out, it will generate a short reset pulse of one CK cycle duration. On the falling edge of this pulse, the delay timer starts counting the Time-out period tTOUT. Refer to page 63 for details on operation of the Watchdog Timer. Figure 9-6. Watchdog Reset During Operation 9.3 Internal Voltage Reference AT90SCR100 features an internal bandgap reference. This reference is used for Brown-out Detection and supply monitor. 9.3.1 Voltage Reference Enable Signals and Start-up Time The voltage reference has a start-up time that may influence the way it should be used. The start-up time is given in Table 9-4. To save power, the reference is not always turned on. The reference is on during the following situations: 1. When the BOD is enabled (by programming the BODENABLE Fuse). 2. Supply Monitor is enabled (by programming the SMONCR.SMONEN bit). VCC RESET TIME-OUT INTERNAL RESET VBOT- VBOT+ tTOUT CK CC |
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