Epson LX-86TM Especificações descarregar pdf (Página 134)

REV.-A

A.1.3

2064C

CMOS

SRAM

The

2064C

is a 8K-byte CMOS static RAM. The

2064C

has low power consumption, and its input/output

level is compatible with the

ITL

ICS. Figure A-8 shows the

2064C

pin diagram, and Figure A-9 shows

block diagram

for the 2064C static

RAM.

● Features

● Capacity of 8192 words X 8 bits

ITL-compatible 1/0

● Power supply + 5V DC

● 28-pin DIP Switch

● Functions

● AO - Al 2

● w

● -

●

Csl,

CS2

● DO - D7

● NC

—

Input address

Write enable

Output enable

Chip select

Input/Output data

No connection

Memory Ce I

Array

512

X 6

AtO

All

A12

Csl

ICI

CSI.CS2

Cm?ml

CS2

Logic

d--b,,

A12

-A4

Vss

L-

206

25 A8

All

AtO

Fig. A-8.

2064C

Pin Diagram

02 03 D 4 05 06 07

Fig. A-9.

2064C

SRAM Block Diagram

Table A-6.

2064C

Truth Table

Csl

CS2

Ao -

A12

DATA

1/0

MODE

— —

—

High impedance

Wait

—

High impedance

Wait

Stable

Input data

Read

L H

Stable

Output data Write

H H

Stable

High impedance

Output disable

NOTES: 1. X = HIGH or LOW

2. – =

HIGH, LOW or High-impedance

A-9

1 2 ... 129 130 131 132 133 134 135 136 137 138 139 140 141 142

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