DS83C520-MCL(2000) Ver la hoja de datos (PDF) - Dallas Semiconductor -> Maxim Integrated

Número de pieza

componentes Descripción

Fabricante

DS83C520-MCL
(Rev.:2000)

EPROM/ROM High-Speed Micro

Dallas Semiconductor -> Maxim Integrated 

DS87C530/DS83C520 BLOCK DIAGRAM Figure 1

DS87C520/DS83C520

PIN DESCRIPTION Table 1

DIP

PLCC

TQFP

40

44

38

20

22,23,

16, 17,

1

39

9

10

4

18

20

14

19

21

15

29

32

26

SIGNAL

NAME

VCC

GND

DESCRIPTION

VCC - +5V

GND - Digital circuit ground.

RST

XTAL2

XTAL1

PSEN

RST - input. The RST input pin contains a Schmitt

voltage input to recognize external active high Reset

inputs. The pin also employs an internal pulldown resistor

to allow for a combination of wired OR external Reset

sources. An RC is not required for power-up, as the

device provides this function internally.

XTAL1, XTAL2 - The crystal oscillator pins XTAL1 and

XTAL2 provide support for parallel resonant, AT cut

crystals. XTAL1 acts also as an input if there is an external

clock source in place of a crystal. XTAL2 serves as the

output of the crystal amplifier.

PSEN - Output. The Program Store Enable output. This

signal is commonly connected to optional external ROM

memory as a chip enable. PSEN will provide an active

low pulse and is driven high when external ROM is not

being accessed.

3 of 42

Share Link: