Commodore Plus 4 Uživatelský manuál stáhnout pdf (Strana 12)

M1 SCHEMATIC ON PAGE 11

PIN

CONFIGURATION

VSS

CSQ)

CS1

RES

RXC

XTL 1

XTLQ)

RTS

CTS

TXD

DTR

RXD

RSQ)

RS1

1

28

2

27

3

26

4

25

5

24

-

6

23

-

7

6551

22

-

8

21

-

9

20

-

10

19

-

11

18

-

12

17

-

13

16

-

14

15

-R/W

-Q)2

-IRQ

-D7

-D6

-D5

-D4

-D3

-D2

-D1

-DQ)

-DSR

-DCD

-VCC

U3-901895-02

ACIA

TRANSMIT/RECIEVE CHARACTERISTICS

CHARACTERTISTICS

SYM

-02

UNIT

2 MHZ

MIN

MAX

TRANSMIT /RECEIVE

*

tCCY

CLOCK RATE

400

-

ns

TRANSMIT /RECEIVE

tCH

CLOCK HIGH TIME

175

-

ns

TRANSMIT/RECEIVE

tCL

CLOCK LOW TIME

175

-

ns

XTL

1 TO TXD

too

PROPAGATION DELAY

-

500

ns

RTS PROPAGATION

tDLY

DELAY

-

500

ns

IRQ PROPAGATION

tlRQ

DELAY (CLEAR)

-

500

ns

SYNERTEK ISYP6551A 12 MHZ

FE

17

16

15

14

13

12

I 1

IQ)

F7

F6

F5

F4

GND

PIN

CONFIGURATION

-

1 28

-

2 27

-

3

26

-

4 25

-

5

24

-

6

23

-

7

22

-

8

21

-

9

20

-

10

19

-

11

18

-

12

17

-

13

16

-

14

15

-VCC

-18

-19

-

-11

Q)

-

-111

-112

-113

-114

-1115

-CE

-FQ)

-F1

-F2

-F3

U19-251641-02

PLA

(tr,

tf

=

10 to 30 ns)

*The Baud Rate with External Clocking is:

BAUD RATE 1

16

x TCCY

CS

R/W

00-07

L

L

DATA BUS

TO PORT

L

H

PORT TO

DATA BUS

H X ISOLATION

R/W

PQ)

P1

P2

P3

P4

P5

P6

P7

VSS

L

=

LOW LEVEL

H

=

HIGH LEVEL

X

=

IRREVELANT

I

MO~[

PIN

CONFIGURATION

-

1 20

-

2

19

-

3

18

-

4

17

-

5

6529

16

-

6 15

-

7

14

-

8 13

-

9 12

-

10 11

-VDD

-CS

-DBQ)

-DB1

-DB2

-DB3

-DB4

-DB5

-DB6

-DB7

6529B

I

3 MHz

I

U5/U27-251640-03

SINGLE PORT

INTERFACE

1 2 ... 7 8 9 10 11 12 13 14 15 16 17 ... 24 25

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