PIC16C926 Microchip Technology Inc., PIC16C926 Datasheet - Page 44
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PIC16C926
Manufacturer Part Number
PIC16C926
Description
64/68-pin Cmos Microcontrollers With Lcd Driver
Manufacturer
Microchip Technology Inc.
Datasheet
1.PIC16C926.pdf
(182 pages)
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PIC16C925/926
FIGURE 5-2:
FIGURE 5-3:
FIGURE 5-4:
DS39544A-page 42
PC
(Program
Counter)
Instruction
TMR0
Instruction
Executed
Fetched
OSC1
OSC1
CLKOUT
Timer0
TMR0IF bit
(INTCON<2>)
GIE bit
(INTCON<7>)
INSTRUCTION
FLOW
PC
Instruction
Fetched
Instruction
Executed
PC
(Program
Counter)
Instruction
Fetched
TMR0
Instruction
Executed
(3)
Note 1: Interrupt flag bit TMR0IF is sampled here (every Q1).
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
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
Q1
PC-1
2: Interrupt latency = 4T
3: CLKOUT is available only in RC oscillator mode.
PC-1
FEh
Inst (PC)
Inst (PC-1)
Q2
TIMER0 TIMING: INTERNAL CLOCK/NO PRESCALE
TIMER0 TIMING: INTERNAL CLOCK/PRESCALE 1:2
TIMER0 INTERRUPT TIMING
1
PC
MOVWF TMR0 MOVF TMR0,W MOVF TMR0,W MOVF TMR0,W MOVF TMR0,W MOVF TMR0,W
MOVWF TMR0 MOVF TMR0,W MOVF TMR0,W MOVF TMR0,W MOVF TMR0,W MOVF TMR0,W
Q3
T0+1
PC
PC
T0+1
Q4
CY
Q1
FFh
where T
Write TMR0
executed
T0+2
Write TMR0
executed
Inst (PC+1)
Inst (PC)
PC+1
Q2
1
PC +1
PC+1
CY
Q3
= instruction cycle time.
Preliminary
Q4
Read TMR0
reads NT0
NT0
Read TMR0
reads NT0
PC+2
PC+2
Q1
00h
Dummy cycle
Q2
PC +1
Read TMR0
reads NT0
Read TMR0
reads NT0
NT0
PC+3
Q3
PC+3
NT0
Q4
Read TMR0
reads NT0
Read TMR0
reads NT0
Q1
NT0
PC+4
01h
PC+4
Dummy cycle
Inst (0004h)
Q2
0004h
Q3
Read TMR0
reads NT0
Read TMR0
reads NT0 + 1
2001 Microchip Technology Inc.
NT0+1
PC+5
Q4
PC+5
Q1
02h
Read TMR0
reads NT0 + 1
Inst (0004h)
Inst (0005h)
Read TMR0
reads NT0 + 2
NT0+1
Q2
NT0+2
0005h
PC+6
PC+6
Q3
Q4
PC+6
T0