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16F628 Datasheet(PDF) 145 Page - Microchip Technology

Part # 16F628
Description  FLASH-Based 8-Bit CMOS Microcontrollers
PDF  168 Pages
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Manufacturer  MICROCHIP [Microchip Technology]
Direct Link  http://www.microchip.com
Logo MICROCHIP - Microchip Technology

16F628 Datasheet(HTML) 145 Page - Microchip Technology

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 2002 Microchip Technology Inc.
Preliminary
DS40044A-page 143
PIC16F627A/628A/648A
TABLE 17-7:
RESET, WATCHDOG TIMER, OSCILLATOR START-UP TIMER AND POWER-UP
TIMER REQUIREMENTS
FIGURE 17-8:
TIMER0 AND TIMER1 EXTERNAL CLOCK TIMINGS
Parameter
No.
Sym
Characteristic
Min
Typ†
Max
Units
Conditions
30
TmcL
MCLR Pulse Width (low)
2000
TBD
—
TBD
—
TBD
ns
ms
V
DD = 5V, -40°C to +85°C
Extended temperature
31
Twdt
Watchdog Timer Time out Period
(No Prescaler)
7*
TBD
18
TBD
33*
TBD
ms
ms
V
DD = 5V, -40°C to +85°C
Extended temperature
32
Tost
Oscillation Start-up Timer Period
—
1024T
OSC
——
T
OSC = OSC1 period
33
Tpwrt
Power-up Timer Period
28*
TBD
72
TBD
132*
TBD
ms
ms
V
DD = 5V, -40°C to +85°C
Extended temperature
34
TIOZ
I/O Hi-impedance from MCLR Low
or Watchdog Timer Reset
—
—
2.0*
µs
35
T
BOR
Brown-out Reset pulse width
100*
—
—
µsVDD ≤ VBOR (D005)
*
These parameters are characterized but not tested.
† Data in “Typ” column is at 5.0V, 25
°C unless otherwise stated. These parameters are for design guidance only and are not
tested.
46
47
45
48
41
42
40
RA4/T0CKI
RB6/T1OSO/T1CKI
TMR0 OR
TMR1



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