AM29F032B-90ED Spansion Inc., AM29F032B-90ED Datasheet - Page 14

• Manufacturer Part Number: AM29F032B-90ED
• Description: Flash Memory IC
• Manufacturer: Spansion Inc.

Specifications of AM29F032B-90ED

• Memory Size: 1Mbit
• Memory Configuration: 4M X 8
• Ic Interface Type: Parallel
• Access Time: 90ns
• Memory Case Style: TSOP
• No. Of Pins: 40
• Operating Temperature Range: 0°C To +70°C
• Peak Reflow Compatible (260 C): Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Sector Group Protection/Unprotection
The hardware sector group protection feature disables
both program and erase operations in any sector
group. Each sector group consists of four adjacent
sectors.
and the address range that each sector group con-
tains. The hardware sector group unprotection feature
re-enables both program and erase operations in pre-
viously protected sector groups.
Sector group protection/unprotection must be imple-
mented using programming equipment. The proce-
dure requires a high voltage (V
and the control pins. Details on this method are pro-
vided in a supplement, publication number 22184.
Contact an AMD representative to obtain a copy of the
appropriate document.
The device is shipped with all sector groups unpro-
tected. AMD offers the option of programming and pro-
tecting sector groups at its factory prior to shipping the
device through AMD’s ExpressFlash™ Service. Con-
tact an AMD representative for details.
It is possible to determine whether a sector group is
protected or unprotected. See
page 11
12
SGA10
SGA11
SGA12
SGA13
SGA14
SGA15
Sector
Group
SGA0
SGA1
SGA2
SGA3
SGA4
SGA5
SGA6
SGA7
SGA8
SGA9
Table 4
Table 4. Sector Group Addresses
for details.
A21
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
shows how the sectors are grouped,
A20
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
A19
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
“Autoselect Mode” on
ID
) on address pin A9
A18
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
SA12
SA16
SA20
SA24
SA28
SA32–SA35
SA36–SA39
SA40–SA43
SA44–SA47
SA48–SA51
SA52–SA55
SA56–SA59
SA60–SA63
SA8
SA0
SA4
Sectors
D A T A
–
–
–
–
–
–
–
–
SA11
SA3
SA7
SA15
SA19
SA23
SA27
SA31
Am29F032B
S H E E T
Temporary Sector Group Unprotect
This feature allows temporary unprotection of previ-
ously protected sector groups to change data in-sys-
tem. The Sector Group Unprotect mode is activated by
setting the RESET# pin to V
ing this mode, formerly protected sector groups can be
programmed or erased by selecting the sector group
addresses. Once V
pin, all the previously protected sector groups are
protected again.
Figure 16 shows the timing diagrams, for this feature.
Notes:
1. All protected sector groups unprotected.
2. All previously protected sector groups are protected
Figure 1. Temporary Sector Group Unprotect
once again.
Figure 1
Temporary Sector Group
ID
Unprotect Completed
Program Operations
Operation
Perform Erase or
is removed from the RESET#
RESET# = V
RESET# = V
(Note 1)
(Note 2)
START
shows the algorithm, and
ID
21610D5 November 2, 2006
(11.5 V – 12.5 V). Dur-
ID
IH