25LC512-I/SM Microchip Technology, 25LC512-I/SM Datasheet - Page 10

• Manufacturer Part Number: 25LC512-I/SM
• Description: IC EEPROM 512KBIT 20MHZ 8SOIC
• Manufacturer: Microchip Technology

Specifications of 25LC512-I/SM

• Memory Size: 512K (64K x 8)
• Format - Memory: EEPROMs - Serial
• Memory Type: EEPROM
• Speed: 20MHz
• Interface: SPI, 3-Wire Serial
• Voltage - Supply: 2.5 V ~ 5.5 V
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 8-SOIC (5.3mm Width), 8-SOP, 8-SOEIAJ
• Memory Configuration: 64K X 8
• Ic Interface Type: SPI
• Clock Frequency: 20MHz
• Supply Voltage Range: 2.5V To 5.5V
• Memory Case Style: SOIJ
• No. Of Pins: 9
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

25LC512
2.3
The 25LC512 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.
The following is a list of conditions under which the
write enable latch will be reset:
FIGURE 2-4:
FIGURE 2-5:
DS22065C-page 10
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
High-Impedance
0
High-Impedance
0
2
2
0
0
3
3
• 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
 2010 Microchip Technology Inc.