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Moteur de recherche de fiches techniques de composants électroniques |
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Moteur de recherche de fiches techniques de composants électroniques |
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M4Z28-BR00SH Fiches technique(PDF) 11 Page - STMicroelectronics |
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M4Z28-BR00SH Fiches technique(HTML) 11 Page - STMicroelectronics |
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11 / 19 page  11/19 M40SZ100Y, M40SZ100W Power-on Reset Output All microprocessors have a reset input which forc- es them to a known state when starting. The M40SZ100Y/W has a reset output (RST) pin which is guaranteed to be low by VPFD (see Table 5, page 7). This signal is an open drain configuration. An appropriate pull-up resistor to VCC should be chosen to control the rise time. This signal will be valid for all voltage conditions, even when VCC equals VSS (with valid battery voltage). Once VCC exceeds the power failure detect volt- age VPFD, an internal timer keeps RST low for tREC to allow the power supply to stabilize. Reset Input (RSTIN) The M40SZ100Y/W provides one independent in- put which can generate an output reset. The dura- tion and function of this reset is identical to a reset generated by a power cycle. Table 7 and Figure 12 illustrate the AC reset characteristics of this func- tion. Pulses shorter than tRLRH will not generate a reset condition. RSTIN is internally pulled up to VCC through a 100kΩ resistor. Figure 12. RSTIN Timing Waveform Note: With pull-up resistor Table 7. Reset AC Characteristics Note: 1. Valid for Ambient Operating Temperature: TA = –40 to 85°C; VCC = 2.7 to 3.6V or 4.5 to 5.5V (except where noted). 2. Pulse width less than 50ns will result in no RESET (for noise immunity). 3. CL = 5pF (see Figure 8, page 6). Symbol Parameter(1) Min Max Unit tRLRH (2) RSTIN Low to RSTIN High 200 ns tR1HRH (3) RSTIN High to RST High 40 200 ms AI04768 RST (1) RSTIN tRLRH tR1HRH |
Numéro de pièce similaire - M4Z28-BR00SH |
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Description similaire - M4Z28-BR00SH |
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