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LHF32KZR
11
3.7 Write
Writing commands to the CUI enable reading of
device data and identifier codes. They also control
inspection and clearing of the status register. When
V CC =V CC1/2/3/4 and V PP =V PPH1/2/3 , the CUI
additionally controls block erase, bank erase, (multi)
4 COMMAND DEFINITIONS
When the V PP voltage ≤ V PPLK, Read operations from
the status register, identifier codes, query, or blocks
are enabled. Placing V PPH1/2/3 on V PP enables
successful block erase, bank erase, (multi) word/byte
write and block lock-bit configuration operations.
word/byte write and block lock-bit configuration.
Device operations are selected by writing specific
The Block Erase command requires appropriate
command data and an address within the block to be
erased. The Word/byte Write command requires the
command and address of the location to be written.
Set Block Lock-Bit command requires the command
and block address within the device (Block Lock) to
be locked. The Clear Block Lock-Bits command
requires the command and address within the device.
The CUI does not occupy an addressable memory
location. It is written when WE# and BE# are active.
The address and data needed to execute a command
are latched on the rising edge of WE# or BE#
(whichever goes high first). Standard microprocessor
write timings are used. Figures 20 and 21 illustrate
WE# and BE#-controlled write operations.
commands into the CUI. Table 4 defines these
commands.
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