MBM29LV320TE80TN Meet Spansion Inc., MBM29LV320TE80TN Datasheet - Page 27

• Manufacturer Part Number: MBM29LV320TE80TN
• Description: Flash Memory Cmos 32 M 4 M ? 8/2 M ? 16 Bit
• Manufacturer: Meet Spansion Inc.

6.
7.
8.
9.
Word 0 (A
identifier code. Word 3 (A
in “MBM29LV320TE/BE Sector Group Protection Verify Autoselect Codes Table” and “Extended Autoselect Code
Table” (■DEVICE BUS OPERATIONS). In order to read the proper device codes when executing the autoselect,
A
tended Autoselect Code Table” in ■DEVICE BUS OPERATIONS.)
The device erasure and programming are accomplished via the command register. The contents of the register
serve as inputs to the internal state machine. The state machine outputs dictate the device function.
The command register itself does not occupy any addressable memory location. The register is a latch used to
store the commands, along with the address and data information needed to execute the command. The com-
mand register is written by bringing WE to V
falling edge of WE or CE, whichever starts later; while data is latched on the rising edge of WE or CE, whichever
starts first. Standard microprocessor write timings are used.
See “Read Only Operation Characteristics” in ■AC CHARACTERISTICS for specific timing parameters.
The device features hardware sector group protection. This feature disables both program and erase operations
in any combination of twenty five sector groups of memory. See “Sector Group Address Tables (MBM29LV320TE/
BE)” in ■FLEXIBLE SECTOR-ERASE ARCHITECTURE. The sector group protection feature is enabled using
programming equipment at the user’s site. The device is shipped with all sector groups unprotected.
To activate it, the programming equipment must force V
11.5 V), CE = V
A
SECTOR-ERASE ARCHITECTURE define the sector address for each of the seventy one (71) individual sectors,
and “Sector Group Address Tables (MBM29LV320TE/BE)” in ■FLEXIBLE SECTOR-ERASE ARCHITECTURE
define the sector group address for each of the twenty five (25) individual group sectors. Programming of the
protection circuitry begins on the falling edge of the WE pulse and is terminated with the rising edge of the same.
Sector group addresses must be held constant during the WE pulse. See “14. Sector Group Protection Timing
Diagram” in ■TIMING DIAGRAM and “5. Sector Group Protection Algorithm” in ■FLOW CHART for sector group
protection waveforms and algorithm.
To verify programming of the protection circuitry, the programming equipment must force V
with CE and OE at V
and A
Otherwise the device produces “0” for unprotected sector. In this mode, the lower order addresses, except for
A
device codes. A
It is also possible to determine if a sector group is protected in the system by writing an Autoselect command.
Performing a read operation at the address location XX02h, where the higher order addresses (A
A
sector group. See “MBM29LV320TE/BE Sector Group Protection Verify Autoselect Codes Table” and “Extended
Autoselect Code Table” in ■DEVICE BUS OPERATIONS for Autoselect codes.
This feature allows temporary unprotection of previously protected sector groups of the device in order to change
data. The Sector Group Unprotection mode is activated by setting the RESET pin to high voltage (V
this mode, formerly protected sector groups can be programmed or erased by selecting the sector group ad-
dresses. Once the V
protected again. See “15. Temporary Sector Group Unprotection Timing Diagram” in ■TIMING DIAGRAM and
“6. Temporary Sector Group Unprotection Algorithm” in ■FLOW CHART.
Write
Sector Group Protection
Temporary Sector Group Unprotection
Extended Sector Group Protection
1
12
0
16
, A
must be V
) should be set to the sector to be protected. “Sector Address Tables (MBM29LV320TE/BE)” in ■FLEXIBLE
, A
1
, and A
15
12
, A
) while (A
0
14
= V
, A
6
IL
are DON’T CARES. Address locations with A
13
IL
. (See “MBM29LV320TE/BE Sector Group Protection Verify Autoselect Codes Table” and “Ex-
IL
) represents the manufacturer’s code (Fujitsu = 04h) and word 1 (A
-1
, and A
and A
6
requires to apply V
, A
IL
1
ID
, A
and WE at V
12
6
is taken away from the RESET pin, all the previously protected sector groups will be
= A
) are the desired sector group address will produce a logical “1” at DQ
0
1
) = (0, 1, 0) produces a logic “1” code at device output DQ
= A
0
= V
0
= V
IL
, A
IH
IH
) represents the extended device code. These three bytes/words are given
1
. Scanning the sector group addresses (A
IL
Retired Product DS05-20894-5E_July 31, 2007
= V
on byte mode.
IH
. The sector group addresses (A
IL
, while CE is at V
MBM29LV320TE/BE
ID
on address pin A
1
= V
IL
IL
and OE is at V
are reserved for Autoselect manufacturer and
20
9
, A
and control pin OE, (suggest V
IH
20
19
. Addresses are latched on the
, A
, A
0
19
18
= V
, A
, A
IH
0
18
17
) represents the device
for a protected sector.
, A
, A
ID
17
16
on address pin A
, A
, A
0
16
15
20
for a protected
, A
, A
, A
80/90/10
14
15
19
ID
, A
, A
, A
). During
13
14
18
, and
, A
, A
ID
13
17
=
9
,
,
27