AT89S52-24AC Ver la hoja de datos (PDF) - Atmel Corporation

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componentes Descripción

Fabricante

AT89S52-24AC

8-bit Microcontroller with 8K Bytes In-System Programmable Flash

Atmel Corporation 

Figure 10-2. Timer 2 Auto Reload Mode (DCEN = 0)

OSC

÷12

T2 PIN

C/T2 = 0

C/T2 = 1

CONTR OL

TR2

RELO AD

T2EX PIN

TRANSITION

DETECTOR

CONTROL

EXEN2

TH2

TL2

OVERFLOW

RCAP2H RCAP2L

TF2

EXF2

TIMER 2

INTERRUPT

Figure 10-3. Timer 2 Auto Reload Mode (DCEN = 1)

(DOWN COUNTING RELOAD VALUE)

0FFH

0FFH

TOGGLE

EXF2

OSC

÷ 12

T2 PIN

C/T2 = 0

C/T2 = 1

OVERFLOW

TH2

TL2

CONTROL

TR2

TF2

TIMER 2

INTERRUPT

RCAP2H RCAP2L

(UP COUNTING RELOAD VALUE)

COUNT

DIRECTION

1=UP

0=DOWN

T2EX PIN

14 AT89S52

1919C–MICRO–3/05

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