25LC1024-I/SN Microchip Technology, 25LC1024-I/SN Datasheet - Page 9

• Manufacturer Part Number: 25LC1024-I/SN
• Description: IC, EEPROM, 1MBIT, SERIAL, 20MHZ, SOIC-8
• Manufacturer: Microchip Technology

Specifications of 25LC1024-I/SN

• Memory Size: 1Mbit
• Ic Interface Type: SPI
• Clock Frequency: 20MHz
• Supply Voltage Range: 2.5V To 5.5V
• Memory Case Style: SOIC
• No. Of Pins: 8
• Operating Temperature Range: -40°C To +85°C
• Svhc: No SVHC (15-Dec-2010)
• Rohs Compliant: Yes
• Memory Configuration: 128K X 8
• Interface Type: Serial, SPI

2.4
The 25XX1024 contains a write enable latch.
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:
 2003 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
See
Preliminary
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
25AA1024/25LC1024
0
0
4
4
1
5
1
5
1
6
1 0
6
0
7
0
7
DS21836A-page 9