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AM29LV116BT-90EC View Datasheet(PDF) - Advanced Micro Devices

Part NameDescriptionManufacturer
AM29LV116BT-90EC 16 Megabit (2 M x 8-Bit) CMOS 3.0 Volt-only Boot Sector Flash Memory AMD
Advanced Micro Devices AMD
AM29LV116BT-90EC Datasheet PDF : 40 Pages
First Prev 11 12 13 14 15 16 17 18 19 20 Next Last
PRELIMINARY
START
PLSCNT = 1
RESET# = VID
Wait 1 µs
Temporary Sector
Unprotect Mode
No First Write
Cycle = 60h?
Yes
Set up sector
address
Sector Protect:
Write 60h to sector
address with
A6 = 0, A1 = 1,
A0 = 0
Wait 150 µs
Increment
PLSCNT
No
PLSCNT
= 25?
Yes
Device failed
Verify Sector
Protect: Write 40h
to sector address
with A6 = 0,
A1 = 1, A0 = 0
Read from
sector address
with A6 = 0,
A1 = 1, A0 = 0
Reset
PLSCNT = 1
No
Data = 01h?
Yes
Yes
Protect another
sector?
No
Remove VID
from RESET#
Sector Protect
Algorithm
Write reset
command
Sector Protect
complete
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
Increment
PLSCNT
START
PLSCNT = 1
RESET# = VID
Wait 1 µs
First Write No Temporary Sector
Cycle = 60h?
Unprotect Mode
Yes
No All sectors
protected?
Yes
Set up first sector
address
Sector Unprotect:
Write 60h to sector
address with
A6 = 1, A1 = 1,
A0 = 0
Wait 15 ms
Verify Sector
Unprotect: Write
40h to sector
address with
A6 = 1, A1 = 1,
A0 = 0
No
PLSCNT
= 1000?
Yes
Read from
sector address
with A6 = 1,
A1 = 1, A0 = 0
No
Data = 00h?
Yes
Set up
next sector
address
Device failed
Sector Unprotect
Algorithm
Last sector No
verified?
Yes
Remove VID
from RESET#
Write reset
command
Sector Unprotect
complete
Figure 1. In-System Sector Protect/Unprotect Algorithms
Am29LV116B
21359C-4
12
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