25lc256 Microchip Technology Inc., 25lc256 Datasheet - Page 9
![no-image](/images/manufacturer_photos/0/4/440/microchip_technology_inc__sml.jpg)
25lc256
Manufacturer Part Number
25lc256
Description
256k Spi Bus Serial Eeprom
Manufacturer
Microchip Technology Inc.
Datasheet
1.25LC256.pdf
(26 pages)
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
25lc256-E/P
Manufacturer:
MCP
Quantity:
360
Part Number:
25lc256-E/P
Manufacturer:
MICROCHIP/微芯
Quantity:
20 000
Company:
Part Number:
25lc256-E/SN
Manufacturer:
MCP
Quantity:
1 647
Company:
Part Number:
25lc256-E/SN
Manufacturer:
MICROCHIPS
Quantity:
819
Part Number:
25lc256-E/SN
Manufacturer:
MICROCHIP/微芯
Quantity:
20 000
Company:
Part Number:
25lc256-E/ST
Manufacturer:
MCP
Quantity:
700
Company:
Part Number:
25lc256-E/ST
Manufacturer:
MICROCHIP
Quantity:
12 000
Part Number:
25lc256-E/ST
Manufacturer:
MICROCHIP/微芯
Quantity:
20 000
Part Number:
25lc256-I/MF
Manufacturer:
MICROCHIP/微芯
Quantity:
20 000
Part Number:
25lc256-I/P
Manufacturer:
MICROCHIP/微芯
Quantity:
20 000
2.4
The 25XX256 contains a write enable latch.
Table 2-1 for the Write-Protect Functionality Matrix.
This latch must be set before any write operation will be
completed internally. The WREN instruction will set the
latch, and the WRDI will reset the latch.
FIGURE 2-4:
FIGURE 2-5:
© 2007 Microchip Technology Inc.
Write Enable (WREN) and Write
Disable (WRDI)
WRITE ENABLE SEQUENCE (WREN)
WRITE DISABLE SEQUENCE (WRDI)
SCK
SO
CS
SI
SCK
SO
CS
SI
0
0
0
0
0
1
0
1
See
High-Impedance
0
High-Impedance
0
2
2
0
0
3
3
The following is a list of conditions under which the
write enable latch will be reset:
• Power-up
• WRDI instruction successfully executed
• WRSR instruction successfully executed
• WRITE instruction successfully executed
0
0
4
4
25AA256/25LC256
1
5
1
5
1
6
1 0
6
0
7
0
7
DS21822F-page 9