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12C508 Folha de dados(PDF) 23 Page - Microchip Technology

Nome de Peças 12C508
Descrição Electrónicos  8-Pin, 8-Bit CMOS Microcontrollers
PDF  113 Pages
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Fabricante Electrônico  MICROCHIP [Microchip Technology]
Página de início  http://www.microchip.com
Logo MICROCHIP - Microchip Technology

12C508 Folha de dados(HTML) 23 Page - Microchip Technology

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© 1999 Microchip Technology Inc.
DS40139E-page 23
PIC12C5XX
FIGURE 5-2:
SUCCESSIVE I/O OPERATION
PC
PC + 1
PC + 2
PC + 3
Q1
Q2
Q3 Q4
Q1 Q2 Q3 Q4 Q1
Q2
Q3 Q4
Q1
Q2
Q3 Q4
Instruction
fetched
GP5:GP0
MOVWF GPIO
NOP
Port pin
sampled here
NOP
MOVF GPIO,W
Instruction
executed
MOVWF GPIO
(Write to
GPIO)
NOP
MOVF GPIO,W
This example shows a write to GPIO followed
by a read from GPIO.
Data setup time = (0.25 TCY – TPD)
where: TCY = instruction cycle.
TPD = propagation delay
Therefore, at higher clock frequencies, a
write followed by a read may be problematic.
(Read
GPIO)
Port pin
written here



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