PIC16F872-E/SS Microchip Technology, PIC16F872-E/SS Datasheet - Page 529

• Manufacturer Part Number: PIC16F872-E/SS
• Description: IC,MICROCONTROLLER,8-BIT,PIC CPU,CMOS,SSOP,28PIN,PLASTIC
• Manufacturer: Microchip Technology
• Series: PIC® 16Fr

Specifications of PIC16F872-E/SS

• Rohs Compliant: YES
• Core Processor: PIC
• Core Size: 8-Bit
• Speed: 20MHz
• Connectivity: I²C, SPI
• Peripherals: Brown-out Detect/Reset, POR, PWM, WDT
• Number Of I /o: 22
• Program Memory Size: 3.5KB (2K x 14)
• Program Memory Type: FLASH
• Eeprom Size: 64 x 8
• Ram Size: 128 x 8
• Voltage - Supply (vcc/vdd): 4 V ~ 5.5 V
• Data Converters: A/D 5x10b
• Oscillator Type: External
• Operating Temperature: -40°C ~ 125°C
• Package / Case: 28-SSOP
• Package: 28SSOP
• Device Core: PIC
• Family Name: PIC16
• Maximum Speed: 20 MHz
• Operating Supply Voltage: 5 V
• Data Bus Width: 8 Bit
• Number Of Programmable I/os: 22
• Interface Type: I2C/SPI
• On-chip Adc: 5-chx10-bit
• Number Of Timers: 3
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

29.4
1997 Microchip Technology Inc.
Q Cycle Activity
Tosc
Each instruction cycle (Tcy) is comprised of four Q cycles (Q1-Q4). The Q cycle is the same as
the device oscillator cycle (T
Read, Process Data, Write etc., of each instruction cycle. The following diagram shows the rela-
tionship of the Q cycles to the instruction cycle.
The four Q cycles that make up an instruction cycle (Tcy) can be generalized as:
Each instruction will show the detailed Q cycle operation for the instruction.
Figure 29-2: Q Cycle Activity
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
Q1
Q2
Tcy1
Q3
Q4
Section 29. Instruction Set
OSC
Q1
). The Q cycles provide the timing/designation for the Decode,
Q2
Tcy2
Q3
Q4
Q1
Q2
Tcy3
Q3
Q4
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