HY57V651620B

Rev. 1.9/Apr.01

2

PIN CONFIGURATION

PIN DESCRIPTION

PIN

PIN NAME

DESCRIPTION

CLK

Clock

The system clock input. All other inputs are registered to the SDRAM on the

rising edge of CLK

CKE

Clock Enable

Controls internal clock signal and when deactivated, the SDRAM will be one

of the states among power down, suspend or self refresh

CS

Chip Select

Enables or disables all inputs except CLK, CKE and DQM

BA0,BA1

Bank Address

Selects bank to be activated during RAS activity

Selects bank to be read/written during CAS activity

A0 ~ A11

Address

Row Address : RA0 ~ RA11, Column Address : CA0 ~ CA7

Auto-precharge flag : A10

RAS , CAS , WE

Row Address Strobe,

Column Address Strobe,

Write Enable

RAS , CAS and WE define the operation

Refer function truth table for details

LDQM, UDQM

Data Input/Output Mask

Controls output buffers in read mode and masks input data in write mode

DQ0 ~ DQ15

Data Input/Output

Multiplexed data input / output pin

Power Supply/Ground

Power supply for internal circuits and input buffers

Data Output Power/Ground

Power supply for output buffers

NC

No Connection

No connection

V SS

DQ15

V SSQ

DQ14

DQ13

V DDQ

DQ12

DQ11

V SSQ

DQ10

DQ9

V DDQ

DQ8

V SS

NC

UDQM

CLK

CKE

NC

A11

A9

A8

A7

A6

A5

A4

V SS

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

54

53

52

51

50

49

48

47

46

45

44

43

42

41

40

39

38

37

36

35

34

33

32

31

30

29

28

VDD

DQ0

VDDQ

DQ1

DQ2

VSSQ

DQ3

DQ4

VDDQ

DQ5

DQ6

VSSQ

DQ7

VDD

LDQM

/WE

/CAS

/RAS

/CS

BA0

BA1

A10/AP

A0

A1

A2

A3

VDD

54pin TSOP II

400mil x 875mil

0.8mm pin pitch