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ST10F273E 数据表(PDF) 90 Page - STMicroelectronics |
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ST10F273E 数据表(HTML) 90 Page - STMicroelectronics |
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90 / 179 page  System reset ST10F273E 90/179 Figure 21. 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 the internal 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 ≤1 ms 1024+8 TCL ≤2 TCL 1) V RPD > 2.5V Asynchronous reset 200 µA Discharge RPD RSTOUT At this time RSTF is sampled LOW so it is definitely LONG reset (After Filter) RSTIN 1024+8 TCL ≤4 TCL2) ≤12 TCL ≤500 ns ≥ 50 ns ≤500 ns ≥ 50 ns ≤500 ns ≥ 50 ns IBUS-CS 7 TCL not t. transparent not t. 3..4 TCL (Internal) not entered |
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