25AA1024-I/MF Microchip Technology, 25AA1024-I/MF Datasheet - Page 11

• Manufacturer Part Number: 25AA1024-I/MF
• Description: IC EEPROM 1MBIT 20MHZ 8DFN
• Manufacturer: Microchip Technology

Specifications of 25AA1024-I/MF

• Memory Size: 1M (128K x 8)
• Format - Memory: EEPROMs - Serial
• Memory Type: EEPROM
• Speed: 20MHz
• Interface: SPI, 3-Wire Serial
• Voltage - Supply: 1.8 V ~ 5.5 V
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 8-DFN
• Memory Configuration: 128K X 8
• Ic Interface Type: SPI
• Clock Frequency: 20MHz
• Supply Voltage Range: 1.8V To 5.5V
• Memory Case Style: DFN
• No. Of Pins: 8
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

2.3
The 25AA1024 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:
 2010 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
• PE instruction successfully executed
• SE instruction successfully executed
• CE instruction successfully executed
0
0
4
4
1
5
1
5
1
6
1 0
6
0
7
0
7
25AA1024
DS21836H-page 11