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16F628 Datasheet(PDF) 35 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) 35 Page - Microchip Technology

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 2002 Microchip Technology Inc.
Preliminary
DS40044A-page 33
PIC16F627A/628A/648A
FIGURE 5-4:
BLOCK DIAGRAM OF RA4/T0CKI PIN
FIGURE 5-5:
BLOCK DIAGRAM OF THE
RA5/MCLR/VPP PIN
FIGURE 5-6:
BLOCK DIAGRAM OF
RA6/OSC2/CLKOUT PIN
Data
Bus
Q
D
Q
CK
N
WR
PORTA
WR
TRISA
Data Latch
TRIS Latch
RD TRISA
RD PORTA
Vss
RA4 Pin
Q
D
Q
CK
D
Q
EN
TMR0 Clock Input
Schmitt Trigger
Input Buffer
Comparator Output
Comparator Mode = 110
Vss
V
DD
1
0
(CMCON Reg.)
D
Q
EN
HV Detect
MCLR Filter
RA5/MCLR/V
PP
MCLR
Program
MCLRE
RD
V
SS
Data
Bus
V
SS
PORTA
RD
circuit
mode
Schmitt Trigger
Input Buffer
TRISA
(Configuration Bit)
WR
D
CK
Q
Q
PORTA
WR
TRISA
V
DD
V
SS
CLKOUT(F
OSC/4)
(F
OSC =
101, 111) (2)
QD
RD
EN
RD PORTA
F
OSC =
D
CK
Q
Q
011, 100, 110 (1)
TRISA
From OSC1
OSC
Circuit
Note
1: INTOSC with RA6 = I/O or RC with RA6 = I/O.
2: INTOSC with RA6 = CLKOUT or RC with RA6 =
CLKOUT.
Schmitt
Trigger
Input Buffer
Data Latch
TRIS Latch
1
0



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