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PRO-LOG CORPORATION

FOAM NO. 101327

DESCRIPTION

PRELIMINARY

Document- # ____

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THIS aoc:u.NT CONTAtNIIIlttO"IEfAIn' INI'O"MATION

a. JItIIO.U)G COltPOtiTlON. ANO SUCH INfIO"MATION

DATE

:'=~,,~~s:~~~~~s:. Ll.TERATURE, USER' MANUAL

AN 0ffItc:mt 0' fIttOoU)G CO"",UTION.

R.L. KIMBALL 15- 16-80 7603

TTL INPUT PORT CARD REV

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7603 TTL INPUT PORT CARD USER'S MANUAL TABLE OF CONTENTS

SECTION 1

SECTION 2. SECTION 3 SECTION 4

SECTION 5 SECTION 6_

SECTION ⁷ SECTION 8 SECTION 9

PRO-LOG

FOAM NO. 101905

Product 0 \e rv i ew - Block 0 i a9

ram

Functional Description

- Genera-I

Purpose Interface

Mapping

Address- Decode,..-

Operati

on

- Chang:i n9

the 7603'

s Port

Address 7601-

Card Envi ronmental Speci

fi

cati on E1 ectri cal Speci fi"catlons-

Mechanical,

7603-

Ope.rating

Subroutine

Modules Maintenance

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~@@ 7603

®u[Q)~(lD®~~~~~~INPUT PORT CARD

TTL INPUT PORT CARD

This card provides eight 8-bitgated input ports (64 input lines).

Input port lines are accessed- at 1 S-pin DIP sockets.

on the card. The input Iines'are TTL compatible with an input rating of 4 low-power Schottky TTL loads.

The 7603 decodes eight address lines with provision for expansion and memory mapping. An on-eard jumper system anows users. to establish the eight consecutive input port addresses occupied by· the 7603.

FEATURES

• User selectabl. port address (256 port field)

• Input rating of 4 10w-9Qwer Schottky TTL loads~

• Provision. for expansion and· memory mapping

• Input buffers· have 200 MV of-hysteresis,

• Input lines include4.7K pullups

• All IC's socketed

• Single +5V operation.

aAT~,=~o-_ _ " , _ - ¥ _ _ < 1 - - - 4 DATA-

I O U P - Q - - - a

IORQ-o---a _SELECT^CARD

ADDRISS aECODER

UaA70---.:"-....

PORT SIUCT

ADD':: o----~--~ ^{DECODI ..}

INPUT PORTS

SHADING INDICAns SOCXIETS

INPUT

PORT

<JAns

FIGURE 1

7803

·,NDICA TES ACTIVe 1.0W I.OGIC

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2. FUNCTIONAL. DESCRIPTION

The

7603

pl"ovides

64 TTL

Input lines which are alternated with

64

ground lines.

These signal tines, if driven by standard

LSTTl

gates and with proper etectl"ical considerations, can be

up

to 10 feet

(3.05m)

^long.

When I"eading from an eight bit input port the state of the input lines at the time

of

the read is transferred to the da ta bus •.

GENERAL. PURPOSE

INTERFACE

The

7603

is useful as.a general'purpose

TTL

int.erface card. If flat cable or twisted· pair discrete wire' cable assembl ies. are used, the ground-signal-ground of the input: connectors mini'mizes crosstalk. between inter-system signa·1 lines in elect rica 11 y no i sy env i ronmen ts ..

FlGURE 2 - TYPICAL INPUT PORT CIRCUIT

PRO-LOG CORPORATION A ^REV ^,4

FORM NO. 101905

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3. -.

Card Address Mapping

.

The 7603 card is setected by

a

decoded combination of address lines A3-A7. The user chooses the card address combination by connecting one jumper wire each from SX and SY to pad matrices adjacent to U2 and U3 (See Diagram). The 7603 is shipped with Port address 00-07 Hexadecimal. To map the 7603 anywhere in the hexadecimal port address of' OO-FF change the·decoder outputs connected to SX and SY.

Port· Add .... _

Address lines AO, A 1 and A2 select one of eight.

sequential input port addresses. The RO· input controls the input gating function.

4.·

ADDRESS DECODER OPERATION

Refer to the schematic, document #102793.

The 7603 uses . two. cascaded 74LS42 decoders (U2 and U3) to decode address lines A3-A7. These decoders are enabled only when' 10RQ.* and 10EXP* are active. Address

1

i nes

AO, A I,. AZ

and the RD* s i gnat are used to gate the sel ect strobes (wh i ch control the input ports) from

u4.

CHANG I NG. THE 7603 PORr ADDRESS

Refer to the assembly diagram, document #102.794.

locate decoders U2. and U3 (74LS42) adjacent .to the STO Bus edge connector. Each decoder devi.ce has a dua 1 row of pads. whi·ch, form decoder· output se 1 ect matri ces.

Make one (and only one.) connection' to each o.f· the matrices adjacent to U2. and U3.

EI\, The decode .... jumper pads numbered as show'n in Fi gure

3

are adj acent to the decoder-

'-'JV

chips on the 7.603.. Also shown are the jumpers (at. xa and yO') whi ch produce hexadecimal port addresses 00, 01" 02. thru' 07,. the selections made when the card

is shipped.

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The I/O address mapping and jumper selection table for 8 addresses per card

shows where to place jumper straps to obtain any efght sequential port

add~esses

in the hexadecimal range OO-FF. Using the lower'of the Z-digit hexadecimal

addresses

desired~

find the most significant hexadecimal address digit along the verticle axis, and the least significant hex digft on the horizontal axis. For

example~

port addresses 00, 01,. 02. thru 07 are obtained by connecting jumpers at XO and YO.

The only restriction that appl res. in address selection for the 7603 is the lower of the eight port addresses (00 as shipped) must occur only at every eighth possible address. For example, the. sequence. 01, 02, 03 thru 08 is not allowed by the decoder.

The pad matrices. adjacent to U2. and U3 are on 0.10 inch (0.25 em) centers. The jumper wires may be conveniently replaced by wirewrap post if frequent address selection changes are anticipated.

0. )(0 YO XO '1'1 f'.

1 )(0 Y2 )(0 '1'3'

2" )(1' YO Xl '1'1

3 )(1 '1'2 )(1 '1'3

.. )(2 YO X2 '1'1

5 X2 '1'2 )(2 '1'3

•

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. JC3 '1''1 x3 '1'3

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X5 '1'0' X!r '1'1

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^{X5 '1'2}_X6 _yo ^{X5. '1'3}_.(6 _'1'1

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JUMPtEft SELECTION

X·

ANO Y

FIGURE. 4 ..

1/0 Address Mapping

And

Jumper Selection Tables For

8

Addresses Per Card

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7603 CARD ENVIRONMENTAL SPECIFICATIONS

RECCO'1ENOED OPEP.,\TI ::C LJHlrs ABSOLUTE ~ION-O?ERAT I ~:G

.-

PARAI1ETER ^{, ...}^~l TYP' MAX MIN ,...AX U~II TS

Frea Air

Te~perature 0

-. ·25 S5 -40 75 °c

I

^Humidity

^& ⁵ ^.1 ⁹⁵

^0'

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A\. . -,' -- . ,. ,-, '-.; ... --- --- ._- -.' .----.... '

~ Non-condensi ng' . .___ _ '

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6. ELECTRICAL SPECIFICATIONS

7603

TTL

INPUT PORT CARD ELECTRICAL TEST SPECIFICATION

<-~l

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RECOMMENDED OPERATING LIMITS ABSOLUTE NON-OPERATING LJMITS '<, /

MNEM. PAAAMETER-

.

MIN. TYP. MAX. MIN. MAX. ^: UNIT

Vee Supply voltage 4.75 5.00 5.25 0.0 7.00 Volt

TA Free air temp.

o·

25- 55 -40 75

:c

USER WORST CASE ELECTRICAL

CHARACTERISTICS

OVER RECOMMENDED TEST LIMITS

Fo .. Input Port

PARAMETER ^.--^-.

..

-HIN TYP

MAX

UNIT'

VIH High level l nput" YO J tagtt

2.0 V

VIL

Low

1evel input voltage

0.7

V

.

^Hysteresⁱ^s. ^(VT+-^VT~)

^Q.2 ^0.4

^'J

for' I nput current each port· 1 ine represents,

4- LSTTL

loads

* ^r _I .

(If

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¹LSTTL load - -- fl.

4mA .

STD' BUS ELECTRICAL CHARACTERISTICS OVER RECOMMENDED TEST LIMITS'

PARAMETER HIN

TYP MAX I

^UNITS

. !

ICC SUPPLY

CURRENT

350,

^·-525

I

^rnA

---

^..

_-_

....

STD BUS INPUT

LOAD

See- Figure

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----.-,.~

STD BUS OUTPUT DR I VE See Figur-.

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FOAM NO. 101905

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MECHANICAL

• Meets aU STO BUS general mechanicai specifi- cations

• May require one additional card slot width for ribbon cable access to input port sockets (connector dependent).

• Connectors use low profile 16-pin DIP plugs with heavy duty pins. T and B Ansley Catalog No. 609- M165H or equivalent.

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FIGURE

5 7603

ASSEMBLY

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STOnea eDGI CONNECTOR PfN UST

PfN NUIIBIR PIN NUMBeR

OUTPUT (DRivel OUTPUT (ORIVI)

INIIUT (LOADING)** 1..-uT (LOADING)

**

. . eMONIC .... eMONIC

~VOLTS vee 2 1 vee -$ VOLTS

GROUNO GNO 4 3 GNO GROUNO

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01 ~a 10 9 ~~ 02

05 a~ 12 11 .5.d ⁰¹

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1.15 1S 15 1 A7

PORT ^1.14' ¹⁸ ¹⁷ ¹ AS

lIT 1.13 20 19 1 A5

0 - 1 1. ^{I - -} ^{. . ;} ^{1.12 .} 22 21 1 A.

1 -^%.,' 15 ^i-o--4

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^1.11 ²⁴ ²³ ¹ ^A3

0 2 - 3 14 i-o--4. 1.10 26 25 1 A2

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1.-1 10 ^~... , MEMRO' ~ 33 t 10RO'

MEMEX' 36 35 t 10EXP'

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^9~'" ^MesYNC~ ^'38 ¹⁷ ^REFRES..-

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^STATUSO'_BuSRO~ ^.so₄₂ ₄₁³⁹ ^STATIJS_eUSAI('^{l '}

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INTIltQ°: .

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Input Port Socket

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PBRESE'" ~ 4;' SVSF'ECSET"

CN-TRt, " 50 49 ,CI.OCK"

PCI IN ~2 '" ^OUT ^PeO

AUltGNO· 54 53 'Aut IlNO

AUX-V 56 ~~ AUX'"

·0 . . . ActtM 1. ... 1. .... loop:

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Designates LSTTL Loads

FI~E

7 - Edge Connector Pin

LJst

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7603. OPERATING SUBROUTINE

MODULE

This section provides a flow diagram and $ub.rQutf'ne to operate

your

7603 card.

r

t may be used

i

ntaet, or us.ed as a mode·l to construct subrout t'nes for a speei

fi

c app 1 i cati·on.

The subroutine is written In 8080 .. family as·sembly code and will ex'ecute on 80S0, 8085, andZ80 processors. The memory- addresses selected are compatlSle wi th P'ro-Log ^ts 780.1 (SOSSA) and 7803" (zSO) processor cards, The 7603 port addresses used are the address jumper' selections made when the 7603 is shipped.

To use the subroutine in systems other than those descri'bed above, the memo ry

and/o

r I/O. po rt. add

res

s'es may requ i re change fo r campa t i b i 1 i ty.

The. flow d i"agram' prese'nt-ed- can be· eas i 1 y trans 1 ated into the assemb 1 y code used.

by

any. microprocessor since' theY. show the steps required to achieve

760.3

operation without. re.ference to a~ particular microprocessor.

Th.e follow-ing subroutine. wi

11

compare -the present port. status wi th the port status from the las,t trme that the port was read.

To use the routi ne the. Hl poi nte .... · must poi nt to a place in memory where port status is stored. Also, the port.' must be read into. the accumulator before ca

11

i"g the routi ne·.

Upon return from the" routine the location that the HL pointer was previously set wi 11 contain new port status. Plus the next four locations w·j 11 contain change status ..

Uses Registers A, ft' and L

M'

XX

New Data ~Location HL was set to M

+ 1 XX

Old Data

M + 2 XX

^Changes

. M +

3

xx

Bits to Zero

M

+ 4 XX

Bi ts

to

One Memory after Return

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