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A29DL324TV-80

32 Megabit (4M x 8-Bit/2M x 16-Bit) CMOS 3.0 Volt-only, Simultaneous Operation Flash Memory

AMIC Technology 

A29DL32x Series

START

PLSCNT=1

RESET=VID

Wait 1 us

Protect all sectors:

The indicated portion of

the sector protect

algorithm must be

performed for all

unprotected sectors prior

to issuing the first sector

unprotect address

START

PLSCNT=1

RESET=VID

Wait 1 us

Temporary Sector No

Unprotect Mode

First Write

Cycle=60h?

Yes

Set up sector

address

Sector Protect:

Write 60h to sector

address with A6=0,

A1=1, A0=0

No

First Write No Temporary Sector

Cycle=60h?

Unprotect Mode

Yes

All sectors

protected?

Yes

Set up first sector

address

Increment

PLSCNT

Wait 150 us

Verify Sector

Protect: Write 40h

to sector address

with A6=0, A1=1,

A0=0

Reset

PLSCNT=1

No

PLSCNT

=25?

Read from

sector address

with A6=0,

A1=1, A0=0

No

Data=01h?**

Yes

Device failed

Yes

Protect another

Yes

sector?

No

Remove VID

from RESET

Sector Unprotect:

Write 60h to sector

address with A6=1,

A1=1, A0=0

Increment

PLSCNT

Wait 15 ms

Verify Sector

Unprotect : Write

40h to sector

address with A6=1,

A1=1, A0=0

No

PLSCNT=

1000?

Yes

Device failed

Read from sector

address with A6=1,

A1=1, A0=0

No

Data=00h?**

Set up

next sector

address

Yes

Last sector

No

verified?

Sector Protect

Algorithm

Write reset

command

Sector Protect

complete

Sector Unprotect

Algorithm

Yes

Remove VID

from RESET

Write reset

Command

Note: The term “sector” in the figure applies to both sectors and sector blocks

* No other command is allowed during this process

** Read access time is 200ns-300ns

Sector Unprotect

complete

Figure 2-1. High Voltage Sector/Sector Block Protection and Unprotection Algorithms

PRELIMINARY (May, 2005, Version 0.0)

16

AMIC Technology, Corp.

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