I: Input pin O: Output pin B: Bi-directional pin P: Power supply pin NC: No connection

No. 5753-3/5

LC8213K

Pin No.

Pin name

I/O

Function

1

CS

I

Chip select signal

2

RD

I

Read signal from the CPU

3

WR

I

Write signal from the CPU

4

A2

I

5

A1

I

Address inputs

6

A0

I

7

P

Power supply

8

NC

9

D7

B

10

D6

B

Data bus

11

D5

B

12

D4

B

13

P

Ground

14

D3

B

15

D2

B

Data bus

16

D1

B

17

D0

B

18

NC

19

P

Power supply

20

IREQ

O

Interrupt request signal

21

DREQ

O

DMA request signal output to external DMA controller

22

DACK

I

DMA acknowledge signal input from external DMA controller

23

NC

24

NC

25

NC

26

NC

27

RESET

I

Reset signal input

28

CLK

I

Clock input

29

P

Ground

30

TEST4

I

Test pin

31

P

Power supply

32

TEST3

I

33

TEST2

I

Test pin

34

TEST1

I

35

TEST0

I

36

NC

37

BREQ

O

Bus request signal for the image bus

38

BACK

I

Acknowledge signal for the image bus

39

IDREQ

I

DMA request signal from I/O devices

40

IDACK

O

DMA acknowledge signal to I/O devices

41

AEN

O

Address enable

42

AST

O

Address strobe

43

MDEN

O

Memory data enable

44

MRD

O

Image memory read signal

45

MWR

O

Image memory write signal

46

IORD

O

I/O device read signal

47

IOWR

O

I/O device write signal

48

LDE

O

Image bus lower byte valid signal

49

UDE

O

Image bus upper byte valid signal

50

READY

I

Ready signal

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