A29DL16X Datasheet, PDF (14/47 Pages) AMIC Technology – 16 Megabit (2M x 8-Bit/1M x 16-Bit) CMOS 3.0 Volt-only, Simultaneous Operation Flash Memory

A29DL16x 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 Protect
Algorithm
Write reset
command
Sector Protect
complete
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?
Read from sector
address with A6=1,
A1=1, A0=0
No
Data=00h?
Set up
next sector
address
Yes
Device failed
Yes
Last sector
No
verified?
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
Sector Unprotect
complete
Figure 2-1. High Voltage Sector/Sector Block Protection and Unprotection Algorithms
PRELIMINARY (September, 2004, Version 0.0)
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AMIC Technology, Corp.