PIC17C42A/JW Microchip Technology, PIC17C42A/JW Datasheet - Page 109

• Manufacturer Part Number: PIC17C42A/JW
• Description: IC MCU EPROM 2KX16 PWM 40CDIP
• Manufacturer: Microchip Technology
• Series: PIC® 17Cr

Specifications of PIC17C42A/JW

• Core Processor: PIC
• Core Size: 8-Bit
• Speed: 33MHz
• Connectivity: UART/USART
• Peripherals: POR, PWM, WDT
• Number Of I /o: 33
• Program Memory Size: 4KB (2K x 16)
• Program Memory Type: EPROM, UV
• Ram Size: 232 x 8
• Voltage - Supply (vcc/vdd): 4.5 V ~ 6 V
• Oscillator Type: External
• Operating Temperature: 0°C ~ 70°C
• Package / Case: 40-CDIP (0.600", 15.24mm) Window
• For Use With: DVA17XP401 - DEVICE ADAPTER FOR PIC17C42AAC174001 - MODULE SKT PROMATEII 40DIP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Eeprom Size: -
• Data Converters: -

15.2
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.
FIGURE 15-2: Q CYCLE ACTIVITY
1996 Microchip Technology Inc.
Q Cycle Activity
Tosc
Q1
Q2
Tcy1
Q3
Q4
Q1
Q2
Tcy2
Q3
The 4 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 NOP
Q2: Instruction Read Cycle or NOP
Q3: Instruction Execute
Q4: Instruction Write Cycle or NOP
Q4
Q1
Q2
Tcy3
Q3
Q4
PIC17C4X
DS30412C-page 109