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PIC17LC44-08/P Datasheet(PDF) 109 Page - Microchip Technology

Part # PIC17LC44-08/P
Description  High-Performance 8-Bit CMOS EPROM/ROM Microcontroller
PDF  240 Pages
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Manufacturer  MICROCHIP [Microchip Technology]
Direct Link  http://www.microchip.com
Logo MICROCHIP - Microchip Technology

PIC17LC44-08/P Datasheet(HTML) 109 Page - Microchip Technology

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© 1996 Microchip Technology Inc.
DS30412C-page 109
PIC17C4X
15.2
Q Cycle Activity
Each instruction cycle (Tcy) is comprised of four Q
cycles (Q1-Q4). The Q cycles provide the timing/desig-
nation for the Decode, Read, Execute, Write etc., of
each instruction cycle. The following diagram shows
the relationship of the Q cycles to the instruction cycle.
The 4 Q cycles that make up an instruction cycle (Tcy)
can be generalized as:
Q1: Instruction Decode Cycle or forced NOP
Q2: Instruction Read Cycle or NOP
Q3: Instruction Execute
Q4: Instruction Write Cycle or NOP
Each instruction will show the detailed Q cycle opera-
tion for the instruction.
FIGURE 15-2: Q CYCLE ACTIVITY
Q1
Q2
Q3
Q4
Q1
Q2
Q3
Q4
Q1
Q2
Q3
Q4
Tcy1
Tcy2
Tcy3
Tosc



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