A67L16181/A67L06361 Series

PRELIMINARY

(February, 2005, Version 0.1)

6

AMIC Technology, Corp.

Pin Description

Pin No.

Symbol

Description

LQFP (X18)

LQFP (X36)

37

36

35,34,33,32,

100,99,82,81

44,45,46,47,

48,49,50,83,84

43

80

37

36

35,34,33,32,

100,99,82,81

45,46,47,48,

49,50,83,84,43

44

A0

A1

A2 – A9

A11-A19

A20

A10

Synchronous Address Inputs : These inputs are registered and

must meet the setup and hold times around the rising edge of

CLK. Pins 83 and 84 are reserved as address bits for higher-

density 9Mb and 18Mb DBA SRAMs, respectively. A0 and A1 are

the two lest significant bits (LSB) of the address field and set the

internal burst counter if burst is desired.

BW1

BW2

BW3

BW4

Synchronous Byte Write Enables : These active low inputs allow

individual bytes to be written when a WRITE cycle is active and

must meet the setup and hold times around the rising edge of

CLK. BYTE WRITEs need to be asserted on the same cycle as

89

89

CLK

Clock : This signal registers the address, data, chip enables, byte

write enables and burst control inputs on its rising edge. All

synchronous inputs must meet setup and hold times around the

clock’s rising edge.

98

98

CE

Synchronous Chip Enable : This active low input is used to enable

the device. This input is sampled only when a new external

address is loaded (ADV/LD LOW).

92

92

CE2

Synchronous Chip Enable : This active low input is used to enable

the device and is sampled only when a new external address is

loaded (ADV/LD LOW). This input can be used for memory depth

expansion.

97

97

CE2

Synchronous Chip Enable : This active high input is used to

enable the device and is sampled only when a new external

address is loaded (ADV/LD LOW). This input can be used for

memory depth expansion.

86

86

OE

Output Enable : This active low asynchronous input enables the

data I/O output drivers.

85

85

ADV/LD

Synchronous Address Advance/Load : When HIGH, this input is

used to advance the internal burst counter, controlling burst

ignored. A LOW on this pin permits a new address to be loaded at

CLK rising edge.

87

87

CEN

Synchronous Clock Enable : This active low input permits CLK to

propagate throughout the device. When HIGH, the device ignores

the CLK input and effectively internally extends the previous CLK

cycle. This input must meet setup and hold times around the

rising edge of CLK.