MX29LV320MB Macronix International, MX29LV320MB Datasheet - Page 21

• Manufacturer Part Number: MX29LV320MB
• Description: 32M-BIT [4M x 8/2M x 16] SINGLE VOLTAGE 3V ONLY FLASH MEMORY
• Manufacturer: Macronix International

gramming operation so that data can be read from any
non-suspended sector. When the Program Suspend com-
mand is written during a programming process, the de-
vice halts the program operation within 15us maximum
(5 us typical) and updates the status bits. Addresses are
not required when writing the Program Suspend command.
After the programming operation has been suspended,
the system can read array data from any non-suspended
sector. The Program Suspend command may also be is-
sued during a programming operation while an erase is
suspended. In this case, data may be read from any ad-
dresses not in Erase Suspend or Program Suspend. If a
read is needed from the Secured Silicon Sector area (One-
time Program area), then user must use the proper com-
mand sequences to enter and exit this region.
The system may also write the autoselect command
sequence when the device is in the Program Suspend
mode. The system can read as many autoselect codes
as required. When the device exits the autoselect mode,
the device reverts to the Program Suspend mode, and is
ready for another valid operation. See Autoselect Com-
mand Sequence for more information.
After the Program Resume command is written, the de-
vice reverts to programming. The system can determine
the status of the program operation using the Q7 or Q6
status bits, just as in the standard program operation.
See Write Operation Status for more information.
SETUP AUTOMATIC CHIP/SECTOR ERASE
Chip erase is a six-bus cycle operation. There are two
"unlock" write cycles. These are followed by writing the
"set-up" command 80H. Two more "unlock" write cycles
are then followed by the chip erase command 10H, or the
sector erase command 30H.
The MX29LV320MT/B contains a Silicon-ID-Read opera-
tion to supplement traditional PROM programming meth-
odology. The operation is initiated by writing the read sili-
con ID command sequence into the command register.
Following the command write, a read cycle with
A1=VIL,A0=VIL retrieves the manufacturer code of C2H.
AUTOMATIC CHIP/SECTOR ERASE COM-
P/N:PM1129
21
MAND
The device does not require the system to preprogram
prior to erase. The Automatic Erase algorithm automati-
cally pre-program and verifies the entire memory for an
all zero data pattern prior to electrical erase. The system
is not required to provide any controls or timings during
these operations. Table 3 shows the address and data
requirements for the chip erase command sequence.
Any commands written to the chip during the Automatic
Erase algorithm are ignored. Note that a hardware reset
during the chip erase operation immediately terminates
the operation. The Chip Erase command sequence should
be reinitiated once the device has returned to reading
array data, to ensure data integrity.
The system can determine the status of the erase opera-
tion by using Q7, Q6, Q2, or RY/BY#. See "Write Opera-
tion Status" for information on these status bits. When
the Automatic Erase algorithm is complete, the device
returns to reading array data and addresses are no longer
latched.
Figure 10 illustrates the algorithm for the erase operation.
See the Erase/Program Operations tables in "AC Char-
acteristics" for parameters, and to Figure 9 for timing
diagrams.
MX29LV320MT/B
REV. 1.1 , JUL. 14, 2005
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