SNR032

32M-bit Mask ROM

1.

INTRODUCTION

The SNR032 is a signal power, 32M-bit, read only memory. It is organized as 4M bytes,

operates for single 3V power supply, support static standby mode. The SNR032

embedded two different interfaces, one is a standard 8-bit/16-bit interface bus which

compatible with SNL310, another one is a special 8-bit AD (address/data) bus which

compatible with SNC710.

SNR032 offers automatic power-down, with power-down controlled by the chip enable

“CEB”. When chip enable goes to high, SNR032 will entry power-down mode in order

to save the power consumption.

2.

FEATURES

Power supply: 2.4V ~ 3.6V

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Memory Size: 32M-bit

Totally static operation

Embedded a standard 8-bit/16-bit bus interface compatible with SNL310 or a 8-bit

AD (address/data) bus interface compatible with SNC710

Access time: 200ns @3V

3.

PIN ASSIGNMENTS

Symbol

IO

Standard Interface

AD Bus Interface

TYPE

I

Bus mode select pin

“1”->AD bus

“0” for 8-bit/16-bit interface

“1”: AD bus mode

“0”: Standard mode

MODE

I

Bus mode select pin

“0”->byte mode

“1” word mode interface

-

A[21..8]

I

Standard ROM A[21..8]

-

A[[7]

I

Standard ROM A[7] / TESTM

TESTM

A[6]

I

Standard ROM A[6] / BS4 ~ BS2

BS4

A[5]

I

Standard ROM A[5] / BS4 ~ BS2

BS3

A[4]

I

Standard ROM A[4] / BS4 ~ BS2

BS2

A[3..2]

I

Standard ROM A[3..2]

-

A[1]

I

Standard ROM A[1]

ALECLK

A[0]

I

Standard ROM A[0]

READY

D[8..15]

I/O Data bus D[8..15]

(for word mode only)

-

D[0..7]

I/O Data bus D[0..7]

AD-Bus D[0..7]

CEB

I

Chip enable pin

Chip enable pin

OEB

I

Output enable pin

-

VDD

P Positive Power supply (3.3volt)

Positive Power supply (3.3volt)

GND

P Negative Power supply (3.3volt)

Negative Power supply (3.3volt)

Ver. 1.2

October 21, 2005

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