PLUS405-55A データシートの表示（PDF） - Philips Electronics

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PLUS405-55A

Programmable logic sequencer (16 × 64 × 8)

Philips Electronics 

Philips Semiconductors Programmable Logic Devices

Programmable logic sequencer

(16 × 64 × 8)

Product specification

PLUS405-55

LOGIC PROGRAMMING

The PLUS405-55 is fully supported by

industry standard (JEDEC compatible) PLD

CAD tools, including Philips Semiconductors

SNAP design software package. ABEL™ and

CUPL™ design software packages also

support the PLUS405-55 architecture.

All packages allow Boolean and state

equation entry formats. SNAP, ABEL and

CUPL also accept, as input, schematic

capture format.

PLUS405-55 logic designs can also be

generated using the program table entry

format, which is detailed on the following

pages. This program table entry format is

supported by SNAP only.

To implement the desired logic functions,

each logic variable (I, B, P, S, T, etc.) from the

logic equations is assigned a symbol. TRUE,

COMPLEMENT, PRESET, RESET, OUTPUT

ENABLE, INACTIVE, etc., symbols are

defined below.

INITIALIZATION/OE OPTION – (INIT/OE)

INIT/OE

INIT/OE

INIT

INIT = 0

E=1

E

(ALWAYS

ENABLED)

(INITIALIZATION

DISABLED)

OPTION

INITIALIZATION1

CODE

H

OPTION

OE

CODE

L

PROGRAMMING THE PLUS405:

The PLUS405 has a power-up preset feature. This feature insures that the device will power-up

in a known state with all register elements (State and Output Register) at logic High (H). When

programming the device it is important to realize this is the initial state of the device. You must

provide a next state jump if you do not wish to use all Highs (H) as the present state.

INITIALIZATION OPTION – (INIT)

PR

PR

PR

PR

ACTION

INDETERMINATE4

INIT

CODE

O

“AND” ARRAY – (I), (P)

i, p

I, P

i, p

STATE

INACTIVE1, 2

Tn

CODE

O

Notes are on next page.

ACTION

PRESET

INIT

CODE

H

i, p

I, P

i, p

STATE

I, P

Tn

CODE

H

ACTION

RESET

INIT

CODE

L

ACTION

INDETERMINATE4

INIT

CODE

–

i, p

I, P

i, p

STATE

I, P

Tn

CODE

L

i, p

I, P

i, p

STATE

DON’T CARE

Tn

CODE

–

ABEL is a trademark of Data I/O Corp.

CUPL is a trademark of Logical Devices, Inc.

October 22, 1993

192

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