PIC17C756A MICROCHIP [Microchip Technology], PIC17C756A Datasheet - Page 199

• Manufacturer Part Number: PIC17C756A
• Description: High-Performance 8-bit CMOS EPROM Microcontrollers with 10-bit A/D
• Manufacturer: MICROCHIP [Microchip Technology]

18.2
Each instruction cycle (T
cycles (Q1-Q4). The Q cycle is the same as the device
oscillator cycle (T
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:
2000 Microchip Technology Inc.
Q Cycle Activity
OSC
T
OSC
). The Q cycles provide the timing/
Q CYCLE ACTIVITY
CY
) is comprised of four Q
Q1
Q2
T
CY
Q3
1
Q4
Q1
Q2
T
CY
Q3
The four Q cycles that make up an instruction cycle
(T
Each instruction will show the detailed Q cycle opera-
tion for the instruction.
2
CY
) can be generalized as:
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
T
CY
Q3
3
PIC17C7XX
Q4
DS30289B-page 199