PIC17C752 MICROCHIP [Microchip Technology], PIC17C752 Datasheet - Page 185

• Manufacturer Part Number: PIC17C752
• Description: High-Performance 8-Bit CMOS EPROM Microcontrollers
• Manufacturer: MICROCHIP [Microchip Technology]

18.2
Each instruction cycle (Tcy) is comprised of four Q
cycles (Q1-Q4). The Q cycle is the same as the device
oscillator cycle (T
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.
FIGURE 18-2: Q CYCLE ACTIVITY
1997 Microchip Technology Inc.
Q Cycle Activity
OSC
Tosc
). The Q cycles provide the tim-
Q1
Q2
Tcy1
Q3
Q4
Q1
Q2
Tcy2
Q3
The four Q cycles that make up an instruction cycle
(Tcy) can be generalized as:
Each instruction will show the detailed Q cycle opera-
tion for the instruction.
Q1: Instruction Decode Cycle or forced No
Q2: Instruction Read Cycle or No operation
Q3: Process the Data
Q4: Instruction Write Cycle or No operation
Q4
operation
Q1
Q2
Tcy3
Q3
Q4
DS30264A-page 185