PIC16C54C-RC/SO 데이터 시트보기 (PDF) - Microchip Technology

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PIC16C54C-RC/SO

EPROM/ROM-Based 8-bit CMOS Microcontroller Series

Microchip Technology 

PIC16C5X

FIGURE 5-3:

TIME-OUT SEQUENCE ON POWER-UP (MCLR NOT TIED TO VDD)

VDD

MCLR

INTERNAL POR

TDRT

DRT TIME-OUT

INTERNAL RESET

FIGURE 5-4:

TIME-OUT SEQUENCE ON POWER-UP (MCLR TIED TO VDD): FAST VDD RISE

TIME

VDD

MCLR

INTERNAL POR

TDRT

DRT TIME-OUT

INTERNAL RESET

FIGURE 5-5:

TIME-OUT SEQUENCE ON POWER-UP (MCLR TIED TO VDD): SLOW VDD RISE

TIME

V1

VDD

MCLR

INTERNAL POR

TDRT

DRT TIME-OUT

INTERNAL RESET

When VDD rises slowly, the TDRT time-out expires long before VDD has reached its final value. In

this example, the chip will RESET properly if, and only if, V1  VDD min

DS30453E-page 22

Preliminary

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