Commodore MPS 1250 User manual

£

-9T

-

OoH

iT

Commodore

MPS

1250

Supplement

to

1200/P

Service Manual

10/88

Commodore

Parallel

and

Serial

BIP

(SPECIFICATIONS FOR

EUROPE)

PARALLEL AND

SERIAL BIP

TABLE OF CONTENTS

1

.

Control Circuit

Block Diagram

o-]

2.

Parallel

Interface Specifications

D-3

(1

)

Specifications

;

D-3

(2)

Pin,

No. and signal name

D-3

(3)

Description

about

interface

signals of

CN12

D-4

3. Serial

Interface

Specifications

D-6

(1

)

Specification

D-6

(2)

Pin No. and Signal name

D-6

(3)

Description

about interface signals

of CN13

'.

.

,

. D-6

(4)

Data transfer sequence

, D-8

4.

Specification

Setting DIP Switches

D-10

5. Parts Lists

6.

Circuit Diagrams

(1)

Mounting Diagram

(2)

Circuit Diagram

f^

STANDARD

Parallel And Serial

BIP {Basic Interface Pack)

1.

Control

Circuit Block

Diagram

Host

Computer

(Cenironici

like)

V

l/F Select

Circuit

) G

7T

Co

mmodors

Clocked Serial

Connector

)/0

Connector

I

J.

I

Serial Bus

I

Control

j

Circuit

I/O

Connector

8

MHz

^^

ALE

CPU

^mI

Address

Laich

II

v.

ROM

128k'

U

RAM

8k

J

Driver Interface

Bus

7^

Shift

oTp

Register

Switcfies

<o-

c

-crb-

Power

/Driver

P.C.B.

Block

Diagram

Fig.

1

A

block

diagram

tor the

parallel

and

serial BIP

is shown

in Fig.

1.

For interface,

either

Centronics

parallel or

Commodore

serial

can be selected by

the

DIP switches

on the

Interface Board.

Parallel

data

of 8 bits

(*DATA1 to

*DATA8)

is input

via

the I/O connector.

Strobe

signal (*DSTB)

is

also

input

together with

the data.

.At

input

of

the strobe

signal,

BUSY

signal

becomes HIGH

and

*DATA1

to*DATA8will be

stored

inside.

When

CPU

finishes

processing

the data,

BUSY

signal

becomes LOW

again

and

inputting

of

data

is

enabled.

Serial data

from

the

host-computer

is

input

through TTL

level

and

converted

to

parallel data

in the

serial bus

control circuit.

The

CPU takes

in the data

when

transferring

of

1

byte

is completed.

Printing is

started

if the

data

input

reaches

one line

or print start

command

code

such as LF

code,

CR

code, etc.

is

received.

This

unit is

controlled

by

an

8-bit

one-chip

microcomputer.

The clock

of CPU

is

8

MHZ

and in-

structions

will

be

executed

with

a

minimum

unit of 1

nS.

The CPU

has

36

I/O

ports

and they are

assigned

to

interface

lines

for host

CPU

and interface bus

with

Power/DriverPCB.

-D-1

-

^

In addition,

the CPU

has six

independent

timers and each

of

them is used to

control

printing timing,

stepping

motor

driving timing,

print head

current flowing

time. etc.

As

the

memory,

ROM of 128

kilobytes

and RAM of

8

kilobytes are provided

as

standard

and the

lower 8

bits of address bus

are the

ones

which

are generated

by

latching the multiplexed

data

bus

with ALE

signal.

o

Connection to

Power/Driver.

PCB

will be done by

the driver interface bus

and this

bus

consists of

the

following control

lines.

•

Clocked

serial

data

bus

•

Stepping motor

voltage

control

line

•

Operation panel control

line

•

Sensors input

signal line"

•

Master reset

signal line

Phase data

of stepping

motor and

printing

data

of print

head are

transmitted

to

Power/Driver

PCB at

high speed via the

above-mentioned

clocked

serial

data

bus.

Moreover, the

data

of

DIP

switches

becomes

serial

data by

means of a

shift register and

it

is

taken

to

CPU by

the clocked

serial

data

bus.

-

D2-

n

2.

Parallel

Interface Specifications

(1)

Specifications

Data

Transmitting

Type

Synchronizing

Method

Handshake

Logic

Level

8

bit

Parallel

By

externally supplied

strobe

By

"ACKor

BUSY

TTL

compatible

(2)

Pin No. and signal name

• Parallel

Specifications

(CN1

2)

No.

RETURN

PIN No.

Signal

name PIN No.

RETURN

PIN No.

Signal name

1 19 •DSTB

16

-

V

2

3

4

5

6

7

8

9

20

21

22

23

24

25

26

27

•DATA!

•DATA2

•0ATA3

•DATA4

•DATA5

•DATA6

•DATA?

'DATA8

17

FRAME

GND

18

+5 V

19-30

TWIST PAIR

GND

31

-

•PRIME

10

28

•ACK

32

-

•FAULT

n 29

BUSY

33

-

GND

12 30

PE 34

-

NC

13

-

SLECT 35

-

•FUSE

(Note 1)

14

-

•AFXT

36

-

•SLCT IN

15

-

NC

(Note

1 )

•FUSE

is

connected

to

+5

V

via

a 3.3 KQ

resistor.

-D-3

-

n

(3)

Description

about interface

signals

of

CN12

•

'DSTB:

Synchronized pulse of

parallel data. The pulse width of this signal must be

more

than

0.5mS

at

the receiving end.

•

*DATA1 to

'DATAS:

The parallel

8-bit

data sent from

the host CPU. High level for

a

logical 1 and LOW

level

for

a

logical

0.

•

*ACK:

Data

demanding

signal sent

from

the

printer

to

the

host CPU.

The

pulse

width

is

ap-

proximately

5 tiS.

This is

a

strobe

sent

out

when the printer

goes to

READY

state.

•

BUSY:

HIGH level Indicates a

"printer busy" status to

the host CPU.

Data

sent during

BUSY state may

not be guaranteed.

When

this signal

goes to LOW level, the printer

is in READY

condition.

BUSY

conditions are as

follows:

a.

During

data

receive time

b.

OFF LINE

c.

In an alarm

condition

•

PE;

Goes to

HIGH

level

when paper

runs

out.

In paper out

status,

the printer

is

auto-

-matically set to

OFF

LINE. It

cannot be reset to ON

LINE status

until

new

paper is

inserted.

•

SLECT:

Connected to +5V

via a 3.3

Kn resistor.

•

'AFXT ('AUTO

FEED XT):

When this

signal is

set to

LOW

level, one line is automatical-

ly fed after

printed by OR

code.

•

"PRIME

(*INIT):

Printer

initializing

signal.

When this signals

is

set to

LOW

level, that indi-

cates the

printer

is in the

same condition as

power on.

The contents

of the print

buffer are cleared.

The pulse

width of this signal must be

more than

50 fiS

at

the

receiving end.

•

'FAULT

(ERROR):

When

this signal is

in LOW

level, the printer

is in one of the

following

three

conditions;

a.

Paper Out

b.

OFF LINE

c.

Printer Error

Printer

error conditions

are as

follows:

•

Home position

sensor

cannot be detected

by

moving

the print

head

at

power

on.

•

During printing,

collation

of the

current

address and

the home

position

sensor

did not

match.

•

"SLOT

IN:

When this

signal is in LOW

level, the

printer is selected.

•SLCTIN

o

LS04

JP1

777-

Fig. 2

Since the

signal

'SLOT

IN

has the

circuitry

shown

in Fig.

2,

caution

should be paid

to

the connection on

the

HOST

side.

Driving

with TTC IC may

cause

damage.

-D-4-

r^

+5 V:

Power

supply of +5 V. This line must

not

be used

at

the HOST side. If used, the

printer

may be damaged.

The

timing chart for data-input is shown in Fig.

3..

SUSY

'ACK

Fig.

3. Timing Chart

-

D-5-

3.

Serial interface

Specifications

(1)

Specifications

Interface

Word

Length

Sianal

Level

Commodore

Serial Bus (Clocked

serial

8-bit

fixed

TTL

(2)

Pin No.

and signal

name

•

Serial Specifications

(CN13)

Fig. 2

Table 1

Pin No.

Signal

In/Out

1 SERIAL

"SRQ

-

2

GND

-

3

SERIAL

ATN

In

4

SERIAL CLK

In

5

SERIAL

DATA

In/Out

6

•RESET

In

Note!:

Pin No. 1

SERIAL 'SRQ is

not con-

nected

to

this unit.

Note 2:

The signal

marked

with an asterisk

*

is

designated as

Aciive-Low.

Note

3:

The column

"In/Out"

refers

to

the

direction

of signal

flow

as

viewed

from

the

printer.

(3)

Description about

interface

signals of CN13

SERIAL

*RSQ

(SERIAL

Service Request):

Interrupt

request to

the host

computer. Not

used

for this

unit.

SERIAL ATN

(SERIAL

Attention):

When this

signal is

in LOW level,

the transferred data

is designated as

device

function

(device address

or

secondary

address

command) and

when

it

is in HIGH

level, the

data

is

designated as a

normal

one.

SERIAL CLK:

A clock

signal

for

data

transfer. All the

data are

transferred with

synchro-

nization

of this

clock.

Moreover,

-prior to

transferring data,

this signal

line

becomes

HIGH

level

to

indicate

that

the

unit is ready for

transmission.

-D-6-

SERIAL DATA:

The

data is

transmitted

onto

this signal line with

syhchronization

of

SERIAL CLK. The

data is established

at the rise

edge of

SERIAL

CLK.

Moreover,

after

data

transfer,

the receiving

side

sets this signal

line

to LOW level

to indicate

that

the

data

is received.

This

goes

to

HIGH level

when-

the

data

is

taken

in.

*RESET: When

this signal

becomes

LOW level,

master

reset is performed

on the

printer.

-

D-7

-

(4)

Data

transfer sequence

BYTE SENT UNDER ATTENTION

(TO 06VICES1

NORMAL

DATA

BYTES

ATN

CLOCK

TS

-

Tat^

TMe>

--Tv

—

TRk

DATA

\\\\\

12 3

4

5 6 7

Th

LSB

MSB

"*"

DATA VALID

t-Tp-

LISTENER

REAOY-FOR-DATA

END-OR-IDENTIFY HANDSHAKE ILAST BYTE IN

MESSAGE)

LISTENER

DATA-ACCEPTED

ATN

TALKER

READY-TO-SEND

TALKER SENDING

cTockJUUVI

DATA

BB

Lfiniiniumn

Tc--

--T

MSB

-Jth

*-Tvp

-

T,

RY

t

u

STENER READYFOR.DATA

EOI-TIMEOUT

HANDSHAKE

LISTENER

READY-FOR-DATA

SYSTEM LINE

RELEASE

t

TALK-ATTENTION

TURN AROUND (TALKER

-

>

LISTENER

TO LISTENER <

-

TALKER)

ATN

="^jumri

DATA

DEVICE ACKNOWLEDGES IT IS

NOW

TALKER

TALKER REAOY-TO-SEND

MS8

"hi

ITK

Tdc

'DA

\

-A^H

t.

Liumjuiim

r0

-~Js

LSB

MSB

READY FOR

DATA

BECOMES

LISTENER,

CLOCK

-

HIGH, DATA LOW

TALKER

READY-TO-SEND

TALKER SENDING

Tc

NE

mrLTuuiJuui

L3

I

LSELSB

DATA VALID

t

LISTENER READY-FOH-OATA

MSB

""nE

\

ummL

^

T

LISTENER

DATA-ACCEPTED

-D-8-

Table

2.

Serial Bus Timing

Description

Symbol Min.

Typ.

Max.

ATN RESPONSE (REQUIRED}'

Tat

—

_

1000

ms

LISTENER HOLD OFF

Th

_

oo

NON-EOI

RESPONSE TO RFD^

Tn

e

—

40

/is

200

/iS

BIT

SET-UP

TALKER^

Ts

20;iS

70

/iS

_

DATA

VALID

Tv

20;£S

20

/IS

—

FRAME HANDSHAKE^

Tf

20

^s

1000

Axs

FRAME

TO RELEASE

OF ATN

Tr 20fiS

—

BETWEEN

BYTES TIME

Tb8

— —

—

EOl RESPONSE TIME

T"ye

—

256

;is

—

EOl RESPONSE HOLD TIME

Te.

60

fjs

—

TALKER RESPONSE

LIMIT Th y

30

us

60

MS

BYTE-ACKNOWLEDGE^

TpR

20

/IS

30

tJS

—

Notes:

1

.

If maximum

time

exceeded, device not

present error.

2.

If maximum time

exceeded;

EOl response

required

3.

If

maximum time

exceeded, frame

error.

4.

Ty

and

Tpp

minimum

must be

60

ms

for external device

to

be

a

talker.

-

D-9-

4. Specification

Setting DIP Switches

4-1.

Serial Interface

Mode {SWl-1

OFF]

4-M. Setting of SW1

SWNo. Function

OFF

ON

Factory

Setting

M

Interface Select

Serial

Parallel-

OFF

1-2

ASCI 1 Translation PET

ASCII

OFF

1-3

Control Code Mode

Commodore

Epson

OFF

M

NLQ/Drafi

Draft

NLQ

OFF

1-5

Device Select

4

5 OFF

1-6

Paper

End Detector Enable

Disable

OFF

1-7

Auto Line

Feed* Disable

Enable

OFF

1-8

Normal/Compressed Normal

Compressed

OFF

Valid only when

SWl-3 is "ON" Ignore If SWl-3 is

"OFF".

4-1-2.

Setting of SW2

Switch Function OFF

ON Factory Setting

2-1

2-2

2-3

Select

International

Character

Set

See Below

OFF

2-4

Unused

-

OFF

COUNTRY

SW2-1

SW2-2 SW2-3

USA/UK/Neiherlands OFF

OFF OFF

Denmark/Norway OFF

OFF ON

Sweden/Finland

OFF

ON OFF

Germany

OFF ON ON

France/Belgium ON

OFF OFF

Italy ON

OFF ON

Switzerland

ON ON OFF

Spain

ON ON ON

r-

D-10-

t

4-2.

Parallel Interface Mode

(SWl-1 ON)

Note) Setting

of SW2-1

through

SW2-4

is

unavailable.

4-3.

Switches SW1-1, 2 means the following:

SWNo.

Function

ON OFF

SW-M Interface Select

Parallel

Serial

SW-1-2

Adds line feed

to

CR code Enabled

Disabled

4-4.

Switches

SW1-3, 4 indicates the four operation

modes according to

its status:

SWl-4 SWl-3 Operation mode

Control Code

OFF OFF mode 1

ESC/P

OFF ON mode

II

ON OFF mode

III AMIGA

ON ON mode IV IBM-PC

4-5.

SW1-5, 6, 7,

8 means the

following according to the abovementioned operation mode:

4-5-1.

mode

I

SWNo.

Function ON OFF

SW1-5 Codes

in columns 8th and 9th Graphic character Control character

SWl-6 Font of zero

Zero and slash

Normal

SWl-7 Print style

Correspondence

quality

Draft

SWl-8 Condensed

mode 17CPI

lOCPl

4-5-2.

mode I

SW No.

Function ON

OFF

SWl-5

Selection

of international character

(Refer to

4-4-5.)

/

SW1-6

SW1-7

SWl-8

Page length

12 inches 1 1

inches

-D-n

-

4-5-3.

modem

SW

No.

Function

ON

OFF

SWl-5 6/8

LPI

8

LPI

6

LPI

swi-e FONT

of ZERO

Zero and

Slash

Zero

SWl-7

Print Style

NLQ

Draft

SW1-8

Condensed

mode

17CPI

10

CPI

4-5-4.

mode

IV

SWNo.

SWl-5

SWl-6

SWT-7

SW1-8

Function

IBM

character set

6/8 LPI

IBM

Denmark/

Norway

Version Character

Set

Buffer-fult

process

ON

SET

2

8

LP!

Enable

No

printir^

OFF

SETT

6 LPI

Disable

Printing

4-5-5.

Selection of

international

character

set

mode II

Nation

SW7 SW6

SW5

OFF, OFF

OFF

USA

OFF

ON

FRANCE

OFF

ON OFF

.

GERMANY

OFF

ON

ENGLAND

ON OFF

OFF

DENMARK

ON

OFF

ON

SWEDEN

ON

ON OFF

ITALY

ON

ON SPAIN

-

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Commodore MPS 1250 User manual

Commodore MPS 1250 User manual

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