LHF32KZ5 View Datasheet(PDF) - Sharp Electronics
Part Name
Description
MFG CO.
'LHF32KZ5' PDF : 66 Pages View PDF
sharp
LHF32KZ5
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
VCC=VCC1/2/3/4 and VPP=VPPH1/2/3, the CUI
additionally controls block erase, bank erase, (multi)
word/byte write and block lock-bit configuration.
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.
4 COMMAND DEFINITIONS
When the VPP voltage ≤ VPPLK, Read operations from
the status register, identifier codes, query, or blocks
are enabled. Placing VPPH1/2/3 on VPP enables
successful block erase, bank erase, (multi) word/byte
write and block lock-bit configuration operations.
Device operations are selected by writing specific
commands into the CUI. Table 4 defines these
commands.
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