AT89LP213 datasheet(23/98 Pages) ATMEL

tên linh kiện	AT89LP213

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3538D–MICRO–10/09

AT89LP213/214

13. I/O Ports

The AT89LP213/214 can be configured for between 9 and 12 I/O pins. The exact number of I/O

pins available depends on the clock and reset options as shown in Table 13-1. All port pins are

5V tolerant as inputs, that is they can be pulled up or driven to 5.5V even when operating at a

lower V

CC such as 3V.

Table 12-4.

IPH

– Interrupt Priority High Register

IPH = B7H

Reset Value = X000 0000B

Not Bit Addressable

–

PGH

PSH

PT1H

PX1H

PT0H

PX0H

Bit

543

Symbol

Function

PGH

General-purpose Interrupt Priority High

PSH

Serial Port Interrupt Priority High

PT1H

Timer 1 Interrupt Priority High

PX1H

External Interrupt 1 Priority High

PT0H

Timer 0 Interrupt Priority High

PX0H

External Interrupt 0 Priority High

Table 13-1.

I/O Pin Configurations

Clock Source

Reset Option

Number of I/O Pins

External Crystal or Resonator

External RST Pin

No external reset

External Clock

External RST Pin

No external reset

Internal RC Oscillator

External RST Pin

No external reset

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