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Intorface

Module, part

number

I)d-1, rév8

C

or

D.

16 Lm

"

_deü,gnmd

to

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_{our family}

_{of oomputór bo8rd$ to}

&

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or

printer

via

b

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_{oo=unKUiom link,}

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mod,

the

systom

becomu

811

effoctive

DCE

_dcvico

and

_{m&y be}

_{coupled to}

&

8t8ndBrd

DTE

_device.

The

RS-232—C

linu,

ínnemoniu,

_UgmK,

directions,

md

_ducriptiom

_are:

Y

Pin

bine

_Sig

_Dir

_Ducription

1 FG

_AA

—

Frme

(Prot0Qtiv6)

Ground

[Note

I]

5

₂

_TxD

_BA

_In

_Traumitted

_D&t&

'

3

_RxD

_BB

_Out

R8ceiv0d

D&t&

3

5

CTS CB

_Out

_Clmr

_To

_Send

§

6

_'DSR

CC

_Out

Data Set

Ready

7 SG

_AB

"

Signal

Ground

_[Note

_I]

8

DCD

_CB

_Out

_Data

_C&rri0r

Detector

11 —

—

Ir

UnuUgnmd

(DTR

for

some

printorm

[Notes 2, 4]

14 STxD

SBA

Ir

Seconíhry Traxumítted

Data

_[Notu

2, 4]

18 _—

_—

Out

_UnuUgned

_[Notu

_{3, 4]}

19 SRTS

SCÁ

_In

_Secondary

Reque6t

To

Send

[ÑOtc8

_{2, 3,}

4J

20 DTR

CD

In

D&t8

_Terminal

Ready

[ÑOté$

_{2, 4]}

Note

_I:

_{JA-1 determines}

mhethem

_Pin

1 (Frame

Ground)

18 _{connected to pin 7,}

(Signal

Ground).

On

_rev

C

_modu1e8,

_defaxAt

₁₆

unconnected.

On

_rev

D

modules, default

18 _connected.

JA—1

_dou

_{not normUly}

_come

_vith

_pinm

Noto

_2:

Jumper

_area

JA—3

_on

_rev

C

_modulu

ajjow6

incoming h8rdv&re

h8nd—

shaktug

on

_{pixi$ 11, 14, 19, or}

20 _to

mset

_the

neeCk

_of

_{variou printerm}

b

&

Note

_3:

Jumper

_8Féá

_JA-2

_OIl

_revision

C

_modules

enablu

the

remote

_r68et

feature.

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JA—2

18 _jumpBred,

_{6hoFtlng Pins}

18 and

19 _forcc8

&

_reset

of

the sjave

_proceuor.

When

_this

_option

18 _{usod, Pin}

19 _may

_not

bo

_med

_for

hardware hanUhakc

(860

_Note

_2).

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_4:

Jumper

_{area JA-2}

_on

_revision

D

modulu

encompú$08

the features

of

both JA-2

and

_{JA-3 of revi$ion}

C

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notes

2 and

_3).

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INTEFACE

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C

or

D

RS-232-C

DCE

(MODEM)

The

MuSYS

_Corp.

_RS-232-C

DCE

(Modem)

_Interface

Module,

_part

number

_{IM-2, revision}

C

or

D,

_is

designed

_to

interface

the

NET-81/82

_family

_of

_computer

boards

_to

a

modem

_via

_a

_standard

_RS-232-C

_serial

_{communications}

link.

When

_used,

_the

_system

_becomes

_an

_effective

_DTE

_device

_and

may

be coupled

_to

_any

_standard

DCE

_device.

The RS-232-C

_lines,

mnemonics,

_signals,

_directions,

and

_descriptions

_are:

Pin

Mne

_Sig

_Dir

_Description

I

FG

AA

--

Frame Ground

121

2

_Txd

_BA

_Out

Transmitted

Data

3

_RXD

_BB

In

Received

Data

4 RTS

CA

_Out

_Request

To

_Send

5 CTS

CB

_In

_Clear

_{To Send}

6

_DSR

_CC

In

Data

Set

Ready

_[4,7]

7

_SG

_AB

--

Signal

Ground

[2]

8 DCD

CF

_In

_Data

_Carrier

_Detector

12 _CI

SCF

_In

_Clock

_Indicator

_13,4,7]

13 SCTS

SCB

_In

_Secondary

_Clear

_{To Send}

_[4,7]

15 TxC

DB

_In

_Transmitted

_Clock

_[5]

17 RxC

DD

_In

_Received

_Clock

_[5]

20 DTR

CD

_Out

_Data

_Terminal

_Ready

_[6]

22 _RI

CE

_In

_Ring

_Indicator

_[3,4,7]

24 TC

DA

_Out

_Transmit

_Clock

_[5]

Note

_l:

_All

jumper

_areas

_are

_normally

shipped

_without

pins

and

_{with indicated}

_default

_conditions

implemented

_{in trace}

_{on the}

_{solder side of}

the

circuit

board.

_Non-default

_options

may

be

realized

by

_cutting

the

_default

_trace

and

jumpering for

the

_{desired option}

_as

_required.

See

_the

_schematic

_for

_all

_jumper

_areas

and

'

default

connections.

Note

2:

JA-1

_determines

whether

Pin

_l

_is

connected

_to

pin 7.

On

_revision

C

_modules,

default

is

unconnected,

on

revision

d,

default

is connected.

Note

3:

JA-2

_determines

the

_{status of the}

Clock

Indicator/Ring

Indicator

input

on

the

serial

I/O

chip

on

the

NET-81/82.

Default

is to

Pin

12,

acting

in

_this

case

as Clock

Indicator

rather

than

the

_standard

Secondary

Data

Carrier

Detect.

Removing

the

_default

_trace

and

_{jumpering to}

Pin

22 _establishes

_Ring

_Indicator

_detection.

Removing

_all

_jumpering

_causes

CI

_to

the

NET-81/82

to

be always

_active.

Note

4:

JA-3

_determines

the

_{status of}

DSR

_to

the

NET-81/82.

_Default

_{is to}

Pin

6

_(DSR).

Options

~

are

to

Pin

12 (CI),

Pin

13 (SCTS),

pin

22 (RI),

or

unjumpered

(always

active).

(11)

IM-2

Rev

C

or

D,,

PAGE

2 Note

5:

JA-4

_determines

the

_clocking

system

used.

For

asynchronous

communications

_(default)

TxC*(Out)

and RxC*(Out)

_are

jumpered

_{as shown}

_on

the schematic, causing the

baud

_{rate clock signal}

from

the

NET-81/82

_to

be looped

back

_to

the

serial

I/O processor.

For

synchronous

_operation,

the

TxC*(1n)

_is

jurnpered

_{to TxC*(Out),}

and

RxC*(1n)

_{to RxC*(Out), providing}

the

_clock

signals

for

the

_{I/O processor}

from

the

modem.

Note

6:

JA-5

_determines

the

_{operation of}

Pin

20,

the

DTR

_line

_to

_the

modem.

_{As most}

modems

_require

_an

active

DTR

_to

_remain

_on

_{line, this}

_{is provided}

_as

the

_default

_condition.

_{This allows the}

system

_to

be

_{reset without disconnecting}

the

remote

user

(the telephone

_line

remains

_active).

_jumpering

JA-5

_{in the other option}

causes

the

DTR

_to

_be

determined

by system

_dtr,

and

_during

a

_reset

the

modems

_will

_go

_off-line

_(hang-up

_{the telephone).}

Note

7:

JA-6

_determines

the

_{status of the}

system

reset.

When

_jumpered

_as

_defaulted,

_remote

_reset

is disabled.

When

_jumpered

_{as the}

_option,

_remote

reset is provided

by the

DSR

_input

_(see

_Note

_4).

,

(12)

. ej'

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