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TC1232 Scheda tecnica(PDF) 6 Page - Microchip Technology |
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TC1232 Scheda tecnica(HTML) 6 Page - Microchip Technology |
6 / 24 page TC1232 DS20001370E-page 6 2002-2014 Microchip Technology Inc. 3.0 PIN DESCRIPTIONS The descriptions of the pins are listed in Table 3-1. TABLE 3-1: PIN FUNCTION TABLES Pin No. Symbol Pin Type Buffer/ Driver Type Function 8-pin PDIP, SOIC 16-pin SOIC 1 2 PB RST I ST Push Button Reset Input. Input for a Manual Reset Switch. This input debounces (ignores) pulses less than 1 ms in duration and is ensured to recognize inputs of 20 ms or greater. L = Manual Reset Switch is Active, Force RST/RST pins Active H = Manual Reset Switch is Inactive. State of RST/RST pins determined by other system conditions. 2 4 TD I ST Time Delay Input. The voltage level on this input determines the Watchdog Timer Time-out period. TD = 0V t TD = 150 ms TD = Open t TD = 600 ms TD = VCC t TD = 1.2s 3 6 TOL I ST Tolerance Input. TOL = GND, Max Voltage Trip Point (VCCTP) = 4.75V (5% tolerance) TOL = VCC, Max Voltage Trip Point (VCCTP) = 4.5V (10% tolerance) 4 8 GND — P The ground reference for the device. 59 RST O Push Pull Reset Output (Active-High) Goes active (High) if one of these conditions occurs: 1. If VCC falls below the selected Reset voltage threshold. 2. If PB RST pin is forced low. 3. If ST pin is not strobed within the minimum selected time-out period. (see TD pin) 4. During power-up. 611 RST O Open Drain Reset Output (Active-Low) Goes active (Low) if one of these conditions occurs: 1. If VCC falls below the selected Reset voltage threshold. 2. If PB RST pin is forced low. 3. If ST pin is not strobed within the minimum selected time-out period. (see TD pin) 4. During power-up. 713 ST I ST Strobe Input Input for Watchdog Timer. WDT period determined by state of TD pin Falling Edge Resets Watchdog Timer counter (no time-out) 815 VCC — P The positive supply (+5V) for the device. — 1,3,5, 7,10,1 2,16 NC — — No internal connection. |
Codice articolo simile - TC1232_14 |
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Descrizione simile - TC1232_14 |
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