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ST10F272M Datasheet(PDF) 88 Page - STMicroelectronics |
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ST10F272M Datasheet(HTML) 88 Page - STMicroelectronics |
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88 / 175 page  System reset ST10F272M 88/176 Figure 23. Synchronous long hardware RESET (EA = 1) 1. If during the reset condition (RSTIN low), RPD voltage drops below the threshold voltage (about 2.5V for 5V operation), the asynchronous reset is then immediately entered. Even if RPD returns above the threshold,the reset is defnitively taken as asynchronous. 2. Minimum RSTIN low pulse duration shall also be longer than 500ns to guarantee the pulse is not masked by theinternal filter (refer to Section 21.1). P0[15:13] not transparent RSTF P0[12:2] transparent not t. P0[1:0] not t. not transparent FLARST RST ≤ 1ms 1024+8 TCL ≤ 2 TCL (1) V RPD > 2.5V Asynchronous Reset not entered 200µA Discharge RPD RSTOUT At this time RSTF is sampled LOW so it is definitely LONG reset (After Filter) RSTIN 1024+8 TCL ≤4 TCL(2) ≤12 TCL ≤ 500ns ≥ 50ns ≤ 500ns ≥ 50ns ≤ 500ns ≥ 50ns IBUS-CS 7 TCL not t. transparent not t. 3..4 TCL (Internal) |
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