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EM6812F2TP24B Scheda tecnica(PDF) 56 Page - EM Microelectronic - MARIN SA |
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EM6812F2TP24B Scheda tecnica(HTML) 56 Page - EM Microelectronic - MARIN SA |
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56 / 81 page ![]() R EM6812 Copyright © 2005, EM Microelectronic-Marin SA 56 www.emmicroelectronic.com 13.2.3.3 External Signal Pulse Condition The Counter function gets activated by the first positive edge of the selected input signal, the following positive edge will stop the counter. In Zero-Stop mode it will stop as soon as the counter reaches 0. The internal Pulse Start recognition signal is first synchronized with the negative edge counter clock. The positive edge of this synchronized signal will enable the timer start. The basic restart conditions as described in 13.2.1and 13.2.2 apply. The pulse start recognition signal is set by the first positive edge of the external start condition and reset by either the following positive edge of the input or it will also be reset when the counter value reaches 0. Figure 32. External start: Pulse condition, Auto-reload mode. Figure 33. External start: Pulse condition, Zero-Stop mode . ClkIn Ext. Start (Pulse) TimXLoad TimXStatus XX XX 03 03 02 01 00 03 02 01 00 03 02 Internal(Start) synchronized Pulse Start recognition Timer Start ClkIn Ext. Start (Pulse) TimXLoad TimXStatus XX XX 03 03 02 01 00 Internal(Start) synchronized Pulse Start recognition 03 02 01 Timer Start |
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