MX29LV320ETTI-70G Macronix, MX29LV320ETTI-70G Datasheet - Page 19

• Manufacturer Part Number: MX29LV320ETTI-70G
• Description: MX29LV Series 3 V 32 Mb (4M x 8/2M x 16) 70 ns Parallel Flash - TSOP-48
• Manufacturer: Macronix

MX29LV320E T/B
FUNCTIONAL OPERATION DESCRIPTION (cont'd)
CHIP UNPROTECT OPERATION
The Chip Unprotect operation unprotects all sectors within the device. It is standard procedure and highly recom-
mended to protect all Sector-Groups prior using the Chip Unprotect operation. This will prevent possible damage
to the Sector-Group protection logic. All Sector Groups are unprotected when shipped from the factory, so this
operation is only necessary if the user has previously protected any Sector-Groups and wishes to unprotect them
now.
MX29LV320E T/B provides two methods for unprotecting the entire chip. The first and preferred method is en-
tered by applying Vhv on RESET# pin and following the timing diagram in
Figure 13
and using the algorithm
shown in
Figure
15.
The second method is entered by asserting Vhv on A9 and OE# pins, with A6 at Vih and CE# at Vil. The protec-
tion operation begins at the falling edge of WE# and terminates at the rising edge. Contact Macronix for more
details on this method.
AUTOMATIC SELECT BUS OPERATIONS
The following five bus operations require A9 to be raised to Vhv. Please see AUTOMATIC SELECT COMMAND
SEQUENCE in the COMMAND OPERATIONS section for details of equivalent command operations that do not
require the use of Vhv.
SECTOR LOCK STATUS VERIFICATION
To determine the protected state of any sector using bus operations, the system performs a READ OPERATION
with A9 raised to Vhv, the sector address applied to address pins A20 to A12, address pins A6 & A0 held LOW,
and address pin A1 held HIGH. If data bit Q0 is LOW, the sector is not protected, and if Q0 is HIGH, the sector
is protected.
READ SILICON ID MANUFACTURER CODE
To determine the Silicon ID Manufacturer Code, the system performs a READ OPERATION with A9 raised to
Vhv and address pins A6, A1, & A0 held LOW. The Macronix ID code of C2h should be present on data bits Q7
to Q0.
READ SILICON ID MX29LV320ET CODE
To verify the Silicon ID MX29LV320ET Code, the system performs a READ OPERATION with A9 raised to Vhv,
address pins A6 & A1 held LOW, and address pin A0 held HIGH. The MX29LV320ET code of A7h should be
present on data bits Q7 to Q0. Q15 to Q8 will be tri-stated unless Word mode is selected. In this case, Q15 to
Q8 will output the value 22h.
READ SILICON ID MX29LV320EB CODE
To verify the Silicon ID MX29LV320EB Code, the system performs a READ OPERATION with A9 raised to Vhv,
address pins A6 & A1 held LOW, and address pin A0 held HIGH. The MX29LV320ET code of A8h should be
present on data bits Q7 to Q0. Q15 to Q8 will be tri-stated unless Word mode is selected. In this case, Q15 to
Q8 will output the code 22h.
P/N:PM1575
REV. 1.2, MAY 23, 2011
19