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MAX6350-T Datasheet(PDF) 11 Page - Maxim Integrated Products |
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MAX6350-T Datasheet(HTML) 11 Page - Maxim Integrated Products |
11 / 14 page MAX6316–MAX6322 5-Pin µP Supervisory Circuits with Watchdog and Manual Reset 11 Maxim Integrated Figure 10 shows an example of a flow diagram where the I/O driving the watchdog input is set high at the beginning of the program, set low at the end of every subroutine or loop, then set high again when the pro- gram returns to the beginning. If the program should hang in any subroutine, the problem would be quickly corrected, since the I/O is continually set low and the watchdog timer is allowed to time out, causing a reset or interrupt to be issued. As described in the Watchdog Input Current section, this scheme results in higher time average WDI current than does leaving WDI low for the majority of the timeout period and periodically pulsing it low-high-low. START SET WDI HIGH PROGRAM CODE SUBROUTINE OR PROGRAM LOOP SET WDI LOW RETURN POSSIBLE INFINITE LOOP PATH Figure 10. Watchdog Flow Diagram GND WDI MR 15 VCC RESET MAX6316 MAX6320 SOT23 TOP VIEW 2 34 GND WDI MR 15 VCC RESET MAX6317 SOT23 2 34 GND WDI RESET 15 VCC RESET MAX6318 MAX6321 SOT23 2 34 GND MR RESET 15 VCC RESET MAX6319 MAX6322 SOT23 2 34 __________________Pin Configurations MAX6316 GND MANUAL RESET I/O WDI MR GND µP VCC VIN VCC RESET RESET Typical Operating Circuit |
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