PLUS405-37 Datasheet, PDF(14/20 Page) NXP Semiconductors – Programmable logic sequencers (16 × 64 × 8)

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PLUS405-37 Datasheet, PDF (14/20 Pages) NXP Semiconductors – Programmable logic sequencers (16 × 64 × 8)

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Philips Semiconductors

Programmable logic sequencers

(16 Ã 64 Ã 8)

Product specification

PLUS405-37/-45

LOGIC PROGRAMMING

The PLUS405-37/-45 is fully supported by industry standard

(JEDEC compatible) PLD CAD tools, including Philips

Semiconductors SNAP design software packages. ABELâ¢ and

CUPLâ¢ design software packages also support the

PLUS405-37/-45 architecture.

All packages allow Boolean and state equation entry formats. SNAP,

ABEL and CUPL also accept, as input, schematic capture format.

INITIALIZATION/OE OPTION â (INIT/OE)

INIT/OE

PLUS405-37/-45 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.

INIT/OE

INIT

INIT = 0

E=1

(ALWAYS

ENABLED)

(INITIALIZATION

DISABLED)

OPTION

INITIALIZATION1

CODE

OPTION

CODE

SP00265

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 â (INIT)

ACTION

INDETERMINATE4

INIT

CODE

âANDâ ARRAY â (I), (P)

i, p

I, P

i, p

STATE

INACTIVE1, 2

CODE

Notes are on next page.

ACTION

PRESET

INIT

CODE

i, p

I, P

i, p

STATE

I, P

CODE

ACTION

RESET

INIT

CODE

ACTION

INDETERMINATE4

INIT

CODE

SP00266

i, p

I, P

i, p

STATE

I, P

CODE

i, p

I, P

i, p

STATE

DONâT CARE

CODE

SP00267

ABEL is a trademark of Data I/O Corp.

CUPL is a trademark of Logical Devices, Inc.

1996 Nov 12

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