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PIC16LC554 数据表(PDF) 41 Page - Microchip Technology |
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PIC16LC554 数据表(HTML) 41 Page - Microchip Technology |
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41 / 96 page  © 1997 Microchip Technology Inc. Preliminary DS40143B-page 41 PIC16C55X(A) 7.4.5 POWER CONTROL/STATUS REGISTER (PCON) Bit1 is POR (Power-on-reset). It is a ‘0’ on power-on-reset and unaffected otherwise. The user must write a ‘1’ to this bit following a power-on-reset. On a subsequent reset if POR is ‘0’, it will indicate that a power-on-reset must have occurred (VDD may have gone too low). TABLE 7-3: TIME-OUT IN VARIOUS SITUATIONS TABLE 7-4: STATUS BITS AND THEIR SIGNIFICANCE Oscillator Configuration Power-up Wake-up from SLEEP PWRTE = 0 PWRTE = 1 XT, HS, LP 72 ms + 1024 TOSC 1024 TOSC 1024 TOSC RC 72 ms — — POR TO PD 0 1 1 Power-on-reset 0 0 X Illegal, TO is set on POR 0 X 0 Illegal, PD is set on POR 1 0 1 WDT Reset 1 0 0 WDT Wake-up 1 1 1 MCLR reset during normal operation 1 1 0 MCLR reset during SLEEP |
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