25AA080B Microchip Technology Inc., 25AA080B Datasheet - Page 9
![no-image](/images/manufacturer_photos/0/4/440/microchip_technology_inc__sml.jpg)
25AA080B
Manufacturer Part Number
25AA080B
Description
8k Spi Bus Serial Eeprom
Manufacturer
Microchip Technology Inc.
Datasheet
1.25AA080B.pdf
(26 pages)
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
25AA080B-I/SN
Manufacturer:
MCP
Quantity:
1 600
Company:
Part Number:
25AA080B-I/SN
Manufacturer:
MICROCHIP
Quantity:
12 000
Company:
Part Number:
25AA080BT-I/SN
Manufacturer:
MICROCHIP
Quantity:
12 000
Company:
Part Number:
25AA080BT-I/ST
Manufacturer:
MICROCHIP
Quantity:
12 000
2.4
The 25XX080A/B contains a write enable latch. See
Table 2-4 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
CS
SO
SCK
SI
CS
SO
SI
0
0
0
0
0
1
0
1
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
1
5
1
5
1
6
1 0
6
0
7
0
7
25XX080A/B
DS21808D-page 9