PIC17C752 Datasheet

  • PIC17C752

  • High-Performance 8-bit CMOS EPROM Microcontrollers with 10-b...

  • 3053.02KB

  • 304页

  • Microchip   Microchip

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PIC17C75X
In Figure 5-5, Figure 5-6 and Figure 5-7, T
PWRT
>
T
OST
, as would be the case in higher frequency crys-
tals. For lower frequency crystals, (i.e., 32 kHz) T
OST
would be greater.
FIGURE 5-5:
TIME-OUT SEQUENCE ON POWER-UP (MCLR TIED TO V
DD
)
V
DD
MCLR
INTERNAL POR
T
PWRT
PWRT TIME-OUT
T
OST
OST TIME-OUT
INTERNAL RESET
FIGURE 5-6:
TIME-OUT SEQUENCE ON POWER-UP (MCLR NOT TIED TO V
DD
)
V
DD
MCLR
INTERNAL POR
T
PWRT
PWRT TIME-OUT
T
OST
OST TIME-OUT
INTERNAL RESET
FIGURE 5-7:
SLOW RISE TIME (MCLR TIED TO V
DD
)
Minimum V
DD
operating voltage
5V
V
DD
MCLR
0V
1V
INTERNAL POR
T
PWRT
PWRT TIME-OUT
T
OST
OST TIME-OUT
INTERNAL RESET
DS30264A-page 24
Preliminary
1997 Microchip Technology Inc.

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