Sharp MZ-700 manual Pi,B, +---i---5,us, uiyl, A ROP ------r-----I, AROP---t ROA, Buffer

,Q 700

7-2. Interfacing with the MZ-700

Fig. 1 shows the block diagram for connection with the printer. Fig. 2 shows its circuit description. Fig. 3 shows the timing chart.

Table of character set

Figure 1. Block diagram

00 --- 1

Buffer

00 --- 1

AROP---t

ROA---;

~

0

I

2

3

4

5

6

7

8

9

A

B

C

D

E

F

LSD

0

sp

0

@

p

>

q

n

I

W

0""

1

A

Q

0

R

e

z

-

[1]

11

2

B

2

U

3

B

#

3

C

S

"

w

m

4

0

$

4

0

T

"v

S

5

[8J

%

5

E

U

u

8x

6

F

,

6

[g

U

t

---1

1

7

/

7

G

W

9

0

=

1

8

C

8

H

><

h

0

I

,

9

j

9

I

'I

k

A

c

J

~

b'f

-

-

A

c

0

*+

c

K

[

c

A

X

V

-

-

[

B

c

5

<

L

""]

d

i

\~

M

-

i

r

uiyl

D

-

-

E

c

>

N

t

I

PI,B i {

\

F

/

?

0

~

C

J

=

[

TranSistor array

MPU

Solenoid driver

Functional Switches

PAPER FEED

PEN CHANGE

Color position detector

X.axls

stepping motor

Y.axls

stepping motor

PEN UP/Down SOlenoid

The CPU sends data to the printer after confirming that RDA is in low state. Five micro seconds later, the strobe signal ARDP goes high. The CPU confirms that RDA is in high state, ARDP is returned to a low state 14.5 micro seconds later.

ROA ----- ,

DATA ______~~~------~------

I

I

I

A ROP ------r-----I,				L1
	-+---i-:--5,us			I
Figure 2. Interfacing timing				- I
		I	14.5	,
	1			1

,us

23