P89C538 Ver la hoja de datos (PDF) - Philips Electronics

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P89C538

CMOS single-chip 8-bit microcontrollers with FLASH program memory

Philips Electronics 

Philips Semiconductors

CMOS single-chip 8-bit microcontrollers

with FLASH program memory

Preliminary specification

89C535/89C536/89C538

OSC

÷ 12

T2 Pin

C/T2 = 0

C/T2 = 1

Transition

Detector

Control

TR2 Capture

TL2

(8-bits)

TH2

(8-bits)

RCAP2L

RCAP2H

T2EX Pin

Control

EXEN2

Figure 2. Timer 2 in Capture Mode

OSC

÷ 12

T2 PIN

C/T2 = 0

C/T2 = 1

TRANSITION

DETECTOR

CONTROL

TR2 RELOAD

TL2

(8-BITS)

TH2

(8-BITS)

RCAP2L

RCAP2H

T2EX PIN

CONTROL

EXEN2

Figure 3. Timer 2 in Auto-Reload Mode

TF2

EXF2

TF2

EXF2

Timer 2

Interrupt

SU00066

TIMER 2

INTERRUPT

SU00067

1997 Jun 05

9

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