A67L1618/A67L0636 Series

PRELIMINARY

(March, 2005, Version 0.1)

7

AMIC Technology, Corp.

Pin Description (continued)

Pin No.

Symbol

Description

LQFP (X18)

LQFP (X36)

64

64

ZZ

Snooze Enable : This active high asynchronous input causes the

device to enter a low-power standby mode in which all data in the

memory array is retained. When active, all other inputs are

ignored.

88

88

Read/Write : This active input determines the cycle type when

ADV/LD is LOW. This is the only means for determining READs

and WRITEs. READ cycles may not be converted into WRITEs

(and vice versa) other than by loading a new address. A LOW on

this pin permits BYTE WRITE operations and must meet the setup

and hold times around the rising edge of CLK. Full bus width

WRITEs occur if all byte write enables are LOW.

74, 73, 72, 69, 68,

63, 62, 59, 58,

24, 23, 22, 19, 18

13, 12, 9, 8

51, 52, 53, 56, 57,

58, 59, 62, 63

68, 69, 72, 73, 74,

75, 78, 79, 80

1, 2, 3, 6, 7, 8, 9,

12, 13,

18, 19, 22, 23, 24,

25, 28, 29, 30

I/Oa

I/Ob

I/Oc

I/Od

SRAM Data I/O : Byte “a” is I/Oa pins; Byte “b” is I/Ob pins; Byte

“c” is I/Oc pins; Byte “d” is I/Od pins. Input data must meet setup

and hold times around CLK rising edge.

31

31

MODE

Mode : This input selects the burst sequence. A LOW on this pin

selects linear burst. NC or HIGH on this pin selects interleaved

burst. Do not alter input state while device is operating.

1, 2, 3, 6, 7, 25, 28,

29, 30, 38, 39, 42,

51, 52, 53, 56, 57,

75, 78, 79, 95, 96

38,39,42

NC

No Connect : These pins can be left floating or connected to GND

to minimize thermal impedance.

15, 41, 65, 91

15, 41, 65, 91

VCC

Power Supply : See DC Electrical Characteristics and Operating

Conditions for range.

14, 16, 66

14, 16, 66

VCC

These pins do not have to be connected directly to VCC as long

as the input voltage is

bus internally.

4, 11, 20, 27,

54, 61, 70, 77

4, 11, 20, 27,

54,

61, 70, 77

VCCQ

Isolated Output Buffer Supply : See DC Electrical Characteristics

and Operating Conditions for range.

17, 40, 90

17, 40, 90

VSS

Ground : GND.

5,10,21,26,

55,60,71,76

5,10,21,26,

55,60,71,76

VSSQ

Isolated Output Buffer Ground