PIC16C554-04E/P Microchip Technology, PIC16C554-04E/P Datasheet - Page 50

• Manufacturer Part Number: PIC16C554-04E/P
• Description: IC MCU OTP 512X14 18DIP
• Manufacturer: Microchip Technology
• Series: PIC® 16Cr

Specifications of PIC16C554-04E/P

• Core Processor: PIC
• Core Size: 8-Bit
• Speed: 4MHz
• Peripherals: POR, WDT
• Number Of I /o: 13
• Program Memory Size: 896B (512 x 14)
• Program Memory Type: OTP
• Ram Size: 80 x 8
• Voltage - Supply (vcc/vdd): 3 V ~ 5.5 V
• Oscillator Type: External
• Operating Temperature: -40°C ~ 125°C
• Package / Case: 18-DIP (0.300", 7.62mm)
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Data Converters: -
• Connectivity: -

PIC16C55X
FIGURE 7-3:
FIGURE 7-4:
DS40143D-page 48
Instruction
PC
(Program
Counter)
Fetch
Instruction
Execute
TMR0
GIE bit
(INTCON<7>)
INSTRUCTION FLOW
T0IF bit
(INTCON<2>)
Instruction
fetched
Instruction
executed
TMR0 timer
Note
CLKOUT(3)
OSC1
1:
2:
3:
PC
Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4
T0
T0IF interrupt flag is sampled here (every Q1).
Interrupt latency = 4 T
CLKOUT is available only in RC Oscillator mode.
PC-1
Q1
FEh
Inst (PC)
Inst (PC-1)
Q2
TIMER0 TIMING: INTERNAL CLOCK/PRESCALE 1:2
TIMER0 INTERRUPT TIMING
PC
1
MOVWF TMR0
Q3
PC
T0+1
Q4
CY
, where T
Q1
MOVF TMR0,W MOVF TMR0,W MOVF TMR0,W
FFh
Write TMR0
executed
Inst (PC+1)
CY
1
Inst (PC)
PC+1
Q2
PC +1
= instruction cycle time.
Q3
Preliminary
Q4
Read TMR0
reads NT0
PC+2
Q1
Interrupt Latency Time
00h
Dummy cycle
Q2
PC +1
Read TMR0
reads NT0
PC+3
Q3
NT0
Q4
MOVF TMR0,W
Read TMR0
reads NT0
Q1
PC+4
01h
Dummy cycle
Inst (0004h)
Q2
0004h
Q3
 2002 Microchip Technology Inc.
MOVF TMR0,W
Read TMR0
reads NT0
PC+5
Q4
Q1
02h
Read TMR0
reads NT0 + 1
Inst (0004h)
Inst (0005h)
NT0+1
Q2
0005h
PC+6
Q3
Q4