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A29DL323UG-90
(Rev.:2002)

32M-Bit CMOS Low Voltage Dual Operation Flash Memory 4M-Byte by 8-Bit (Byte Mode) / 2M-Word by 16-Bit (Word Mode)

AMIC Technology 

A29DL323 Series

Boot Block Sector Protect

The boot block sector protect mode protects the two sectors

of the boot block. This mode is set when VIL is input to WP

(ACC). If VIL is input to WP (ACC) even in the temporary

sector group unprotect mode, the boot block remains

protected and protection of the other sectors is temporarily

canceled.

Accelerated Mode

This mode is used to program the device at high speed,

and the programming time can be shortened to about 60%.

To program the device in the accelerated mode, input

VACC to WP (ACC) and use an unlock bypass program

command. Therefore, ordinary commands can be used for

programming or detection of completion of programming.

If VACC is input to WP (ACC), the device is automatically

set in the unlock bypass mode. Therefore, the unlock

bypass set command and reset command are not

necessary. The accelerated mode is automatically canceled

if the input of VACC to WP (ACC) is stopped.

In the accelerated mode, protection of the sector group is

temporarily canceled. Exercise care in programming the

device at this time.

For the timing waveform, refer to Timing Waveform for

Accelerated Mode.

Dual Operation

This device can execute a program or erase operation and

a read operation simultaneously. By selecting bank 1 or 2

by changing the bank address, one bank can execute a

read operation while the other bank is executing a program

or erase operation. When changing the bank address, no

wait cycle is necessary. Note that two or more program or

erase operation. When changing the bank address, no wait

cycle is necessary. Note that two or more operations cannot

be executed at the same time in the same bank.

The following table shows the combinations of bank

operations.

For the timing waveform, refer to Timing Waveform for Dual

Operation.

Table 2. Dual Operation

Case

1

2

3

4

5

6

7

Operation of Bank 1

Read mode

Read mode

Read mode

Read mode

Product ID

Program (Note 1)

Erase (Note 2)

Operation of Bank 2

Read mode

Product ID

Program (Note 1)

Erase (Note 2)

Read mode

Read mode

Read mode

Notes 1. The program operation is suspended by the program suspend command, and addresses not

being programmed to at this time can only be read.

2. The erase operation is suspended by the erase suspend command. The sector not erased at

this time can be read or programmed.

PRELIMINARY (May, 2002, Version 0.0)

7

AMIC Technology, Inc.

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