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PIC17C752-08/CL Datasheet(PDF) 197 Page - Microchip Technology

Part # PIC17C752-08/CL
Description  High-Performance 8-Bit CMOS EPROM Microcontrollers with 10-bit A/D
PDF  328 Pages
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Manufacturer  MICROCHIP [Microchip Technology]
Direct Link  http://www.microchip.com
Logo MICROCHIP - Microchip Technology

PIC17C752-08/CL Datasheet(HTML) 197 Page - Microchip Technology

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© 1998 Microchip Technology Inc.
DS30289A-page 197
PIC17C7XX
18.2
Q Cycle Activity
Each instruction cycle (TCY) is comprised of four Q
cycles (Q1-Q4). The Q cycle is the same as the device
oscillator cycle (TOSC). The Q cycles provide the tim-
ing/designation for the Decode, Read, Process Data,
Write etc., of each instruction cycle. The following dia-
gram shows the relationship of the Q cycles to the
instruction cycle.
The four Q cycles that make up an instruction cycle
(TCY) can be generalized as:
Q1: Instruction Decode Cycle or forced No
operation
Q2: Instruction Read Cycle or No operation
Q3: Process the Data
Q4: Instruction Write Cycle or No operation
Each instruction will show the detailed Q cycle opera-
tion for the instruction.
FIGURE 18-2: Q CYCLE ACTIVITY
Q1
Q2
Q3
Q4
Q1
Q2
Q3
Q4
Q1
Q2
Q3
Q4
TCY1TCY2TCY3
Tosc



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