MBM29DL16XTE70PFTN Meet Spansion Inc., MBM29DL16XTE70PFTN Datasheet - Page 31

• Manufacturer Part Number: MBM29DL16XTE70PFTN
• Description: Flash Memory Cmos 16m 2m ? 8/1m ? 16 Bit Dual Operation
• Manufacturer: Meet Spansion Inc.

• Write
• Sector Group Protection
• Temporary Sector Group Unprotection
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 function of the device.
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
command register is written by bringing WE to V
the falling edge of WE or CE, whichever happens later; while data is latched on the rising edge of WE or CE,
whichever happens first. Standard microprocessor write timings are used.
Refer to AC Write Characteristics and the Erase/Programming Waveforms for specific timing parameters.
The MBM29DL16XTD/BD feature hardware sector group protection. This feature will disable both program and
erase operations in any combination of seventeen sector groups of memory. (See “Sector Group Addresses
(MBM29DL16XTD/BD) Tables” 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 this mode, the programming equipment must force V
V
and A
MBM29DL162TD/BD, MBM29DL163TD/BD, MBM29DL164TD/BD)” in ■FLEXIBLE SECTOR-ERASE
ARCHITECTURE define the sector address for each of the thirty nine (39) individual sectors, and “Sector Group
Addresses (MBM29DL16XTD/BD) Tables” in ■FLEXIBLE SECTOR-ERASE ARCHITECTURE define the sector
group address for each of the seventeen (17) 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 “(15) AC Waveforms for Sector Group Protection”
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
A
Otherwise the device will produce “0” for unprotected sector. In this mode, the lower order addresses, except
for A
and 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
group. See “MBM29DL161TD/BD, MBM29DL162TD/BD, MBM29DL163TD/BD and MBM29DL164TD/BD
Sector Group Protection Verify Autoselect Codes Tables” and these “Extended Autoselect Code Tables” in
■DEVICE BUS OPERATION for Autoselect codes.
This feature allows temporary unprotection of previously protected sector groups of the MBM29DL16XTD/BD
devices in order to change data. The Sector Group Unprotection mode is activated by setting the RESET pin to
high voltage (V
the sector group addresses. Once the V
groups will be protected again. Refer to “(16) Temporary Sector Group Unprotection Timing Diagram” in ■TIMING
DIAGRAM and “(6) Temporary Sector Group Unprotection Algorithm” in ■FLOW CHART.
ID
12
15
) while (A
, A
= 11.5 V), CE = V
0
, A
14
12
, A
) should be set to the sector to be protected. “Sector Address Tables (MBM29DL161TD/BD,
1
, and A
13
, and A
6
, A
ID
1
6
). During this mode, formerly protected sector groups can be programmed or erased by selecting
, A
are DON’T CARES. Address locations with A
12
0
) are the desired sector group address will produce a logical “1” at DQ
) = (0, 1, 0) will produce a logical “1” code at device output DQ
-1
IL
IL
and WE at V
requires to apply to V
and A
0
= A
6
IH
= V
. Scanning the sector group addresses (A
Retired Product DS05-20874-8E_July 12, 2007
IL
ID
, A
is taken away from the RESET pin, all the previously protected sector
1
IL
= V
on byte mode.
IH
IL
, while CE is at V
. The sector group addresses (A
MBM29DL16XTD/BD
ID
1
= V
on address pin A
IL
IL
and OE is at V
are reserved for Autoselect manufacturer
19
, A
9
19
IH
and control pin OE, (suggest
18
0
, A
. Addresses are latched on
, A
for a protected sector.
18
17
, A
0
, A
for a protected sector
17
ID
16
, A
on address pin A
, A
16
15
19
, A
, A
, A
15
14
18
, A
, A
, A
14
-70/90
13
17
, A
, and
, A
13
16
,
9
,
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