Rainbow-electronics AT89C51RC Manual de usuario descargar pdf (Pagina 11)

AT89C51RC

Figure 4. Timer 2 Auto Reload Mode (DCEN = 1)

Figure 5. Timer 2 in Baud Rate Generator Mode

OSC

EXF2

TF2

T2EX PIN

COUNT

DIRECTION

1=UP

0=DO

T2 PIN

TR2

CONTROL

OVERFLOW

TOGGLE

TIMER 2

INTERRUPT

RCAP2LRCAP2H

0FFH0FFH

TH2 TL2

C/T2 = 0

C/T2 = 1

(DOWN COUNTING RELOAD VALUE)

(UP COUNTING RELOAD VALUE)

OSC

SMOD1

RCLK

TCLK

CLOCK

T2EX PIN

T2 PIN

TR2

CONTROL

"1"

"0"

TIMER 1 OVERFLOW

NOTE: OSC. FREQ. IS DIVIDED BY 2, NOT 12

TIMER 2

INTERRUPT

RCAP2LRCAP2H

TH2 TL2

C/T2 = 0

C/T2 = 1

EXF2

CONTROL

TRANSITION

DETECTOR

EXEN2

1 2 ... 6 7 8 9 10 11 12 13 14 15 16 ... 24 25

Microcontroller 1
AT89C51RC 1
1920A–08/00/xM 25

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Rainbow-electronics AT89C51RC Manual de usuario Pagina 11

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