MPC89E53AF datasheet(18/38 Pages) MEGAWIN

Il numero della parte	MPC89E53AF

Spiegazioni elettronici	8-bit micro-controller

PDF	38 Pages

Scroll/Zoom	100%

Produttore elettronici	MEGAWIN [Megawin Technology Co., Ltd]

Homepage	http://www.megawin.com.tw/megawin_EN/Index.asp

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18 / 38 page

Auto-Reload Up-Only Mode (ARUO)

In ARUO mode, Timer2 can be configured to count up with a software-defined value to be

reloaded. When reset is applied to the DCEN =0 and CP/RL2=0, Timer2 is at ARUO mode. An

overflow on Timer2 or 1-to-0 transition on T2EX pin will load RCAP2H and RCAP2L contents

onto Timer2, also set TF2 and EXF2, respectively.

OSC/12

T2 pin

TR2

TL2 [7:0]

TF2

Interrupt

C//T2

TH2[7:0]

RCAP2L [7:0]

RCAP2H [7:0]

T2EX pin

EXEN2

EXF2

Auto-Reload Up-Down Mode (ARUD)

In ARUD mode, Timer2 can be configured to count up or down. When DCEN =1 and

CP/RL2=0, Timer2 is at ARUD mode. The counting direction is determined by T2EX pin. If

T2EX=1, counting up, otherwise counting down. An overflow on Timer2 will set TF2 and toggle

EXF2. EXF2 cannot generate interrupt request in this mode. If the counting direction is DOWN,

the overflow loads 0xFFFF onto Timer2 and if counting direction is UP, the overflow loads

RCAP2H, RCAP2L contents onto Timer2.