MBM29LV160TE70TN Meet Spansion Inc., MBM29LV160TE70TN Datasheet - Page 20

• Manufacturer Part Number: MBM29LV160TE70TN
• Description: Flash Memory Cmos 16m 2m ? 8/1m ? 16 Bit
• Manufacturer: Meet Spansion Inc.

20
MBM29LV160TE
command sequence is illustrated in “MBM29LV160TE/BE Standard Command Definitions” Table.
Byte 0 (A
For the MBM29LV160TE/BE these two bytes are given in the Expanded Autoselect Code Table. All identifiers
for manufactures and device will exhibit odd parity with DQ
device codes when executing the Autoselect, A
(BYTE = V
(BYTE = V
If BYTE = V
V
In order to determine which sectors are write protected, A
addresses; if the selected sector is protected, a logical ‘1’ will be output on DQ
• Write
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 com-
mand register is written by bringing WE to V
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.
• Sector Protection
The MBM29LV160TE/BE features hardware sector protection. This feature will disable both program and erase
operations in any number of sectors (0 through 34). The sector protection feature is enabled using programming
equipment at the user’s site. The device is shipped with all sectors unprotected.
To activate this mode, the programming equipment must force V
V
the sector to be protected. MBM29LV160TE’s/BE’s “Sector Address Table” define the sector address for each
of the thirty five (35) individual 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 addresses must be held constant during
the WE pulse. See “Sector Protection Timing Diagram” in “■TIMING DIAGRAM” and “Sector Protection Algo-
rithm” in “■FLOW CHART” for sector protection waveforms and algorithm.
To verify programming of the protection circuitry, the programming equipment must force V
with CE and OE at V
while (A
device will read 00h for an unprotected sector. In this mode, the lower order addresses, except for A
A
codes. A
It is also possible to determine if a sector is protected in the system by writing an Autoselect command. Performing
a read operation at the address location XX02h, where the higher order addresses pins (A
A
“MBM29LV160TE/BE Sector Protection Verify Autoselect Code and Expanded Autoselect Code” Tables for
Autoselect codes.
• Temporary Sector Unprotection
This feature allows temporary unprotection of previously protected sectors of the MBM29LV160TE/BE devices
in order to change data. The Sector Unprotection mode is activated by setting the RESET pin to high voltage
(V
dresses. Once the V
again. (See “Temporary Sector Unprotection Timing Diagram” in “■TIMING DIAGRAM” and “Temporary Sector
Unprotection Algorithm” in “■FLOW CHART”.)
IH
IL
6
14
ID
, A
are DON’T CARES. Address locations with A
, A
(for word mode), the device code is 22C4h (for top boot block) or 2249h (for bottom boot block).
). During this mode, formerly protected sectors can be programmed or erased by selecting the sector ad-
0
13
= A
, and A
6
, A
-1
0
6
IH
requires to V
= V
IH
IL
1
= V
) or (BYTE = V
), DQ
, A
(for byte mode), the device code is C4h (for top boot block) or 49h (for bottom boot block). If BYTE =
IL
0
12
) represents the manufacture’s code and byte 1 (A
IL
) = (0, 1, 0) will produce a logical “1” at device output DQ
, A
) represents the sector address will produce a logical “1” at DQ
9
and DQ
1
= V
ID
IL
is taken away from the RESET pin, all the previously protected sectors will be protected
and WE at V
IH
IL
. The sector addresses pins (A
in byte mode.
IL
13
)” Tables in “■DEVICE BUS OPERATIONS”.) For device identification in word mode
are equal to ‘1’ and DQ
70/90
IH
Retired Product DS05-20883-7E_July 31, 2007
. Scanning the sector addresses (A
/MBM29LV160BE
IL
, while CE is at V
1
must be V
1
= V
8
, DQ
IL
19
are reserved for Autoselect manufacturer and device
10
, A
7
defined as the parity bit. In order to read the proper
IL
1
to DQ
. (See “MBM29LV160TE/BE User Bus Operation
18
must be at V
IL
, A
and OE is at V
ID
17
0
12
on address pin A
, A
= V
, DQ
16
IH
, A
) represents the device identifier code.
14
0
19
, and DQ
15
for a protected sector. Otherwise the
, A
IH
, A
while running through the sector
18
14
70/90
IH
, A
0
, A
. Addresses are latched on the
(DQ
0
17
13
15
for a protected sector. See
, A
9
, and A
are equal to ‘0’.
0
and control pin OE, CE =
16
=1).
, A
15
ID
19
12
, A
, A
on address pin A
) should be set to
14
18
, A
, A
13
17
, and A
0
, A
, A
16
1
, and
, A
12
15
9
)
,