AM29BDS643GT5KVAI datasheet(9/49 Pages) SPANSION

部品番号	AM29BDS643GT5KVAI

部品情報	64 Megabit (4 M x 16-Bit) CMOS 1.8 Volt-only Simultaneous Read/Write, Burst Mode Flash Memory

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9 / 49 page

May 8, 2006 25692A2

Am29BDS643G

7

D A TA

SH EE T

INPUT/OUTPUT DESCRIPTIONS

A16–A21

=

Address Inputs

A/DQ0–

=

Multiplexed Address/Data input/output

A/DQ15

CE#

=

Chip Enable Input. Asynchronous

relative to CLK for the Burst mode.

OE#

=

Output Enable Input. Asynchronous

relative to CLK for the Burst mode.

WE#

=

Write Enable Input.

VCC

=

Device Power Supply (1.7 V–1.9 V).

VSS

=Ground

NC

=

No Connect; not connected internally

RDY

=

Ready output; indicates the status of

the Burst read. Low = data not valid at

expected time. High = data valid.

CLK

=

The first rising edge of CLK in

conjunction with AVD# low latches

address input and activates burst

mode operation. After the initial word

is output, subsequent rising edges of

CLK increment the internal address

counter. CLK should remain low

during asynchronous access.

AVD#

=

Address Valid input. Indicates to

device that the valid address is

present on the address inputs

(address bits A0–A15 are multiplexed,

address bits A16–A21 are address

only).

Low = for asynchronous mode,

indicates valid address; for burst

mode, causes starting address to be

latched on rising edge of CLK.

High = device ignores address inputs

PS

=

Power Saving input/output

During a read operation, PS indicates

whether or not the data on the outputs

are inverted. Low = data not inverted;

High = data inverted

During write or command operations,

if the PS input is taken high the input

data will be inverted internally; if the

PS input is low the input data will not

be inverted internally

RESET#

=

Hardware reset input. Low = device

resets and returns to reading array

data

WP#

=

Hardware write protect input. Low =

disables writes to SA132 and SA133

VPP

=

At 12 V, accelerates programming;

automatically places device in unlock

bypass mode. At VIL, disables

program and erase functions. Should

be at VIH for all other conditions.

LOGIC SYMBOL

6

16

A/DQ0–

A/DQ15

A16–A21

CE#

OE#

WE#

RESET#

CLK

RDY

PS

AVD#

WP#

VPP

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Advanced Micro Devices	AM29BDS643GT5KVAI	714Kb / 49P	64 Megabit (4 M x 16-Bit) CMOS 1.8 Volt-only Simultaneous Read/Write, Burst Mode Flash Memory

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