PIC12C508A Microchip Technology, PIC12C508A Datasheet - Page 23

• Manufacturer Part Number: PIC12C508A
• Description: 8-Pin/ 8-Bit CMOS Microcontrollers
• Manufacturer: Microchip Technology

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