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PIC16F72 Datasheet(PDF) 65 Page - Microchip Technology

No. de pieza PIC16F72
Descripción Electrónicos  28-Pin, 8-Bit CMOS FLASH Microcontoller with A/D Converter
PDF  136 Pages
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Fabricante Electrónico  MICROCHIP [Microchip Technology]
Página de inicio  http://www.microchip.com
Logo MICROCHIP - Microchip Technology

PIC16F72 Datasheet(HTML) 65 Page - Microchip Technology

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© 2007 Microchip Technology Inc.
DS39597C-page 63
PIC16F72
FIGURE 11-4:
SIMPLIFIED BLOCK DIAGRAM OF ON-CHIP RESET CIRCUIT
11.4
MCLR
PIC16F72 device has a noise filter in the MCLR Reset
path. The filter will detect and ignore small pulses.
It should be noted that a WDT Reset does not drive
MCLR pin low.
The behavior of the ESD protection on the MCLR pin
has been altered from previous devices of this family.
Voltages applied to the pin that exceed its specification
can result in both MCLR and excessive current beyond
the device specification during the ESD event. For this
reason, Microchip recommends that the MCLR pin no
longer be tied directly to VDD. The use of an
RC network, as shown in Figure 11-5, is suggested.
FIGURE 11-5:
RECOMMENDED MCLR
CIRCUIT
S
R
Q
External
RESET
MCLR
VDD
OSC1
WDT
Module
VDD Rise
Detect
OST/PWRT
On-chip
RC OSC
WDT
Time-out
Power-on Reset
OST
10-bit Ripple Counter
PWRT
Chip_Reset
10-bit Ripple Counter
Reset
Enable OST
Enable PWRT
SLEEP
Note
1:
This is a separate oscillator from the RC oscillator of the CLKI pin.
Brown-out
Reset
BOREN
(1)
C1
0.1
μF
R1
1 k
Ω (or greater)
(optional, not critical)
VDD
MCLR
PIC16F72



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