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TC1232EPA Scheda tecnica(PDF) 5 Page - TelCom Semiconductor, Inc |
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TC1232EPA Scheda tecnica(HTML) 5 Page - TelCom Semiconductor, Inc |
5 / 6 page 5-23 TELCOM SEMICONDUCTOR, INC. 7 6 5 4 3 1 2 8 TC1232 MICROPROCESSOR MONITOR RST V IL t PB RST t PBD V IH t RST PB RST Figure 3. Push-button Reset. The debounced PB RST input ignores input pulses less than 1msec and is guaranteed to recognize pulses of 20msec or greater Figure 4. Strobe Input Figure 5. Power-Down Slew Rate Figure 6. Power-Up Slew Rate +4.75V t F V CC +4.25V t R V CC +4.25V +4.75V t ST ST t TD NOTE: t TD IS THE MAXIMUM ELAPSED TIME BETWEEN ST HIGH-TO-LOW TRANSITIONS (ST IS ACTIVATED BY FALLING EDGES ONLY) WHICH WILL KEEP THE WATCHDOG TIMER FROM FORCING THE RESET OUTPUTS ACTIVE FOR A TIME OF tRST. tTD IS A FUNCTION OF THE VOLTAGE AT THE TD PIN, AS TABULATED BELOW. CONDITON MIN TYP MAX TD PIN = 0V TD PIN = OPEN TD PIN = VCC 62.5msec 150msec 250msec 250msec 600msec 1000msec 500msec 1200msec 2000msec t TD PUSH-BUTTON RESET |
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