IC89E58-40PQ datasheet(6/36 Pages) ICSI

Part #	IC89E58-40PQ

Description	8-BITS SINGLE MICROCONTROLLER with 16/32/64-Kbytes of FLASH, 256 byte 512 byte RAM

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Manufacturer	ICSI [Integrated Circuit Solution Inc]

Direct Link	http://www.icsi.com.tw

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6 / 36 page

IC89E54/58/64

6

Integrated CircuitSolution Inc.

MC012-0C 11/16/2001

Table 1. Detailed Pin Description (continued)

Symbol

PDIP

PLCC

PQFP

I/O

Name and Function

P3.0-P3.7

10-17

11, 13-19

5, 7-13

I/O

Port 3: Port 3 is an 8-bit bi-directional I/O port with internal

pullups. Port 3 pins that have 1s written to them are pulled high

by the internal pullups and can be used as inputs. As inputs, port

3 pins that are externally pulled low will source current because

of the internal pullups.

Port 3 also serves the special features of the IC89E54/58/64, as

listed below:

10

11

5

I

RxD (P3.0): Serial input port.

11

13

7

O

TxD (P3.1): Serial output port.

12

14

8

I

INT0

INT0 (P3.2): External interrupt. Serve as A14 during memory

program and verification.

13

15

9

I

INT1

INT1 (P3.3): External interrupt. Serve as A15 during memory

program and verification.

14

16

10

I

T0 (P3.4): Timer 0 external input.

15

17

11

I

T1 (P3.5): Timer 1 external input.

16

18

12

O

WR

WR (P3.6):External data memory write strobe. Control signal

during memory program, verification and erase.

17

19

13

O

RD

RD (P3.7): External data memory read strobe. Control signal

during memory program, verification and erase.

P4.0-P4.3

23

17

I/O

Port 4: In mode 0, Port 4 is an 8-bit bi-directional I/O port

34

29

with internal pullups. Port 4 pins that have 1s written to them are

1

39

pulled high by the internal pullups and can be used as inputs.

12

6

As inputs, port 4 pins that are externally pulled low will source

current because of the internal pullups.

In mode 1, 2, 3, Port 4 is an address strobe signal which appears

with

RD or WR signals.

12

6

Port 4 also serves the special features, as listed below:

139

INT2

INT2 (P4.3): External interrupt

INT3

INT3 (P4.2): External interrupt

RST

9

10

4

I

Reset: A high on this pin for two machine cycles while the

oscillator is running resets the device. An internal resistor to

VSS permits a power-on reset using only an external capacitor.

A small internal resistor permits power-on reset using only a

capacitor connected to VCC.

RST is an input control signal during memory program and

verification.

XTAL 2

18

20

14

O

Crystal 2: Output from the inverting oscillator amplifier.

XTAL 1

19

21

15

I

Crystal 1: Input to the inverting oscillator amplifier and input

to the internal clock generator circuits.

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