AT49BV802DT Ver la hoja de datos (PDF) - Atmel Corporation

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AT49BV802DT

8-megabit (512K x 16/1M x 8) 3-volt Only Flash Memory

Atmel Corporation 

A six-byte command (Enter Single Pulse Program Mode) sequence to remove the requirement

of entering the three-byte program sequence is offered to further improve programming time.

After entering the six-byte code, only single pulses on the write control lines are required for writ-

ing into the device. This mode (Single Pulse Byte/Word Program) is exited by powering down

the device, or by pulsing the RESET pin low for a minimum of 500 ns and then bringing it back to

VCC. Erase, Erase Suspend/Resume and Program Suspend/Resume commands will not work

while in this mode; if entered they will result in data being programmed into the device. It is not

recommended that the six-byte code reside in the software of the final product but only exist in

external programming code.

The BYTE pin controls whether the device data I/O pins operate in the byte or word configura-

tion. If the BYTE pin is set at logic “1”, the device is in word configuration, I/O0 - I/O15 are active

and controlled by CE and OE.

If the BYTE pin is set at logic “0”, the device is in byte configuration, and only data I/O pins I/O0

- I/O7 are active and controlled by CE and OE. The data I/O pins I/O8 - I/O14 are tri-stated, and

the I/O15 pin is used as an input for the LSB (A-1) address function.

2. Pin Configurations

Pin Name

A0 - A18

CE

OE

WE

RESET

RDY/BUSY

I/O0 - I/O14

I/O15 (A-1)

BYTE

NC

Function

Addresses

Chip Enable

Output Enable

Write Enable

Reset

READY/BUSY Output

Data Inputs/Outputs

I/O15 (Data Input/Output, Word Mode)

A-1 (LSB Address Input, Byte Mode)

Selects Byte or Word Mode

No Connect

2 AT49BV802D(T)

3626A–FLASH–2/07

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