AUSTIN SEMICONDUCTOR, INC.

nvSRAM

nvSRAM

nvSRAM

nvSRAM

nvSRAM

AS8nvC512K32

AS8nvC512K32

Rev. 0.0 08/09

Austin Semiconductor, Inc. reserves the right to change products or specifications without notice.

2

Austin Semiconductor, Inc.

ADVANCE INFORMATION

PIN ASSIGNMENT

(Top View)

68 Lead CQFP (Q)

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

I/O 0

I/O 1

I/O 2

I/O 3

I/O 4

I/O 5

I/O 6

I/O 7

GND

I/O 8

I/O 9

I/O 10

I/O 11

I/O 12

I/O 13

I/O 14

I/O 15

I/O 16

I/O 17

I/O 18

I/O 19

I/O 20

I/O 21

I/O 22

I/O 23

GND

I/O 24

I/O 25

I/O 26

I/O 27

I/O 28

I/O 29

I/O 30

I/O 31

60

59

58

57

56

55

54

53

52

51

50

49

48

47

46

45

44

MILITARY PINOUT/BLOCK DIAGRAM

CS

CS

CS

CS

M1

M2

M3

M4

Notes:

1. This pin left open if ordered with capacitors already mounted in

package.

2. HSB\ signal is wired to all 4 die in module. This can be left open if

not used.

Pin Name

I/O Type

Description

A0 – A18

Address Inputs Used to Select one of the 524,288 bytes of the nvSRAM for x8 Configuration.

A0 – A17

Address Inputs Used to Select one of the 262,144 words of the nvSRAM for x16 Configuration.

DQ0 – DQ7

DQ0 – DQ15

DQ16 DQ23

DQ24 DQ31

Input

Write Enable Input, Active LOW. When selected LOW, data on the I/O pins is written to the specific

address location.

Input

Chip Enable Input, Active LOW. When LOW, selects the chip. When HIGH, deselects the chip.

OE\

Input

Output Enable, Active LOW. The active LOW OE input enables the data output buffers during read cycles.

I/O pins are tri stated on deasserting OE HIGH.

Ground

Ground for the Device. Must be connected to the ground of the system.

Power Supply

Power Supply Inputs to the Device.

HSB\

Input/Output

Hardware Store Busy (HSB\). When LOW this output indicates that a hardware store is in progress. When

pulled LOW external to the chip it initiates a nonvolatile STORE operation. A weak internal pull up resistor

keeps this pin HIGH if not connected (connection optional). After each store operation HSB\ is driven

HIGH for short time with standard output high current.

Power Supply

AutoStore Capacitor. Supplies power to the nvSRAM during power loss to store data from SRAM to

nonvolatile elements. (leave pin open if caps mounted on package)

NC

No Connect

No Connect. This pin is not connected to the die.

Input

Input/Output

Bidirectional Data I/O Lines for die M1 (DQ0 7), M2 (DQ8 15), M3 (DQ16 23), M4 (DQ 24 31)