P89C51X2 데이터 시트보기 (PDF) - Philips Electronics

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P89C51X2

8-bit Flash microcontroller family 4K/8K/16K/32K Flash

Philips Electronics 

Philips Semiconductors

80C51 8-bit Flash microcontroller family

4K/8K/16K/32K Flash

Preliminary data

P89C51X2/52X2/54X2/58X2

OSC

÷ n*

T2 Pin

C/T2 = 0

C/T2 = 1

CONTROL

TL2

(8-BITS)

TH2

(8-BITS)

TRANSITION

DETECTOR

TR2 RELOAD

RCAP2L

RCAP2H

TF2

T2EX PIN

CONTROL

*n = 6 in 6-clock mode; n = 12 in 12-clock mode.

EXEN2

Figure 9. Timer 2 in Auto-Reload Mode (DCEN = 0)

EXF2

TIMER 2

INTERRUPT

SU01623

(DOWN COUNTING RELOAD VALUE)

FFH

FFH

TOGGLE

EXF2

OSC

÷ n*

T2 Pin

C/T2 = 0

TL2

C/T2 = 1

CONTROL

TR2

OVERFLOW

TH2

*n = 6 in 6-clock mode; n = 12 in 12-clock mode.

RCAP2L

RCAP2H

(UP COUNTING RELOAD VALUE)

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

TF2

COUNT

DIRECTION

1 = UP

0 = DOWN

T2EX PIN

INTERRUPT

SU01624

2002 Jun 06

18

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