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CF745 データシートの表示(PDF) - Microchip Technology

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CF745 Datasheet PDF : 217 Pages
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PIC16C5X
FIGURE 6-3: TIMER0 TIMING: INTERNAL CLOCK/NO PRESCALE
PC
(Program
Counter)
Instruction
Fetch
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
PC-1
PC
PC+1
PC+2
PC+3
PC+4
PC+5
PC+6
MOVWF TMR0 MOVF TMR0,W MOVF TMR0,W MOVF TMR0,W MOVF TMR0,W MOVF TMR0,W
Timer0
T0
Instruction
Executed
T0+1
T0+2
NT0
NT0
NT0
NT0+1
NT0+2
Write TMR0
executed
Read TMR0
reads NT0
Read TMR0
reads NT0
Read TMR0
reads NT0
Read TMR0
Read TMR0
reads NT0 + 1 reads NT0 + 2
FIGURE 6-4: TIMER0 TIMING: INTERNAL CLOCK/PRESCALE 1:2
PC
(Program
Counter)
Instruction
Fetch
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
PC-1
PC
PC+1
PC+2
PC+3
PC+4
PC+5
MOVWF TMR0 MOVF TMR0,W MOVF TMR0,W MOVF TMR0,W MOVF TMR0,W MOVF TMR0,W
PC+6
Timer0
T0
T0+1
NT0
NT0+1
T0
Instruction
Execute
Write TMR0
executed
Read TMR0
reads NT0
Read TMR0
reads NT0
Read TMR0
reads NT0
Read TMR0
reads NT0
Read TMR0
reads NT0 + 1
TABLE 6-1: REGISTERS ASSOCIATED WITH TIMER0
Address Name Bit 7 Bit 6 Bit 5 Bit 4 Bit 3
01h
TMR0 Timer0 - 8-bit real-time clock/counter
N/A
OPTION —
— T0CS T0SE PSA
Legend: Shaded cells: Unimplemented bits,
- = unimplemented, x = unknown, u = unchanged,
Bit 2
PS2
Bit 1
PS1
Bit 0
Value on
Power-On
Reset
Value on
MCLR and
WDT Reset
xxxx xxxx uuuu uuuu
PS0 --11 1111 --11 1111
DS30453B-page 28
Preliminary
© 1998 Microchip Technology Inc.

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