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LHF08CTE
9
3.5 Read Identifier Codes Operation
The read identifier codes operation outputs the
manufacturer code, device code, block lock
configuration codes for each block, and the master
lock configuration code (see Figure 4). Using the
manufacturer and device codes, the system CPU can
automatically match the device with its proper
algorithms. The block lock and master lock
configuration codes identify locked and unlocked
blocks and master lock-bit setting.
FFFFF
Reserved for
3.6 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 PP =V PPH1/2/3 , the CUI additionally controls block
erasure, byte write, and lock-bit configuration.
The Block Erase command requires appropriate
command data and an address within the block to be
erased. The Byte Write command requires the
command and address of the location to be written.
Set Master and Block Lock-Bit commands require the
command and address within the device (Master
Lock) or block within the device (Block Lock) to be
locked. The Clear Block Lock-Bits command requires
the command and address within the device.
F0004
F0003
Future Implementation
The CUI does not occupy an addressable memory
location. It is written when WE# and CE# are active.
F0002
F0001
Block 15 Lock Configuration Code
Reserved for
The address and data needed to execute a command
are latched on the rising edge of WE# or CE#
(whichever goes high first). Standard microprocessor
F0000
Future Implementation
Block 15
write timings are used. Figures 16 and 17 illustrate
WE# and CE#-controlled write operations.
1FFFF
(Blocks 2 through 14)
4 COMMAND DEFINITIONS
When the V PP voltage ≤ V PPLK , Read operations
from the status register, identifier codes, or blocks
10004
10003
10002
Reserved for
Future Implementation
Block 1 Lock Configuration Code
are enabled. Placing V PPH1/2/3 on V PP enables
successful block erase, byte write and lock-bit
configuration operations.
Device operations are selected by writing specific
10001
10000
Reserved for
Future Implementation
Block 1
commands into the CUI. Table 4 defines these
commands.
0FFFF
Reserved for
Future Implementation
00004
00003
00002
00001
Master Lock Configuration Code
Block 0 Lock Configuration Code
Device Code
00000
Manufacturer Code
Block 0
Figure 4. Device Identifier Code Memory Map
Rev. 1.3
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