11lc080 Microchip Technology Inc., 11lc080 Datasheet - Page 13

• Manufacturer Part Number: 11lc080
• Description: 1k-16k Uni/o Serial Eeprom Family Data Sheet
• Manufacturer: Microchip Technology Inc.

4.4
The 11XX contains a write enable latch. See Table 6-1
for the Write-Protect Functionality Matrix. This latch
must be set before any write operation will be com-
pleted internally. The
latch, and the
FIGURE 4-4:
FIGURE 4-5:
© 2008 Microchip Technology Inc.
Note: The
SCIO
SCIO
SCIO
SCIO
Write Enable (WREN) and Write
Disable (WRDI) Instructions
be terminated with a NoMAK following
the command byte. If a NoMAK is not
received at this point, the command will
be considered invalid, and the device
will go into Idle mode without responding
with a SAK or executing the command.
WRDI
WREN
1
1
Standby Pulse
Standby Pulse
0
0
instruction will reset the latch.
and
0
0
Command
Command
WRITE ENABLE COMMAND SEQUENCE
WRITE DISABLE COMMAND SEQUENCE
WREN
1
1
WRDI
0
0
instruction will set the
1
0
instructions must
1
0
0
1
0
0
Start Header
Start Header
1
1
Preliminary
0
0
1
1
0
0
1
1
The following is a list of conditions under which the
write enable latch will be reset:
• Power-up
•
•
•
•
•
WRDI
WRSR
WRITE
ERAL
SETAL
0
0
11AAXXX/11LCXXX
1
1
instruction successfully executed
instruction successfully executed
instruction successfully executed
instruction successfully executed
instruction successfully executed
1
1
0
0
Device Address
Device Address
1
1
0
0
0
0
0
0
0
0
DS22067E-page 13
0
0