25LC020A-I/ST Microchip Technology, 25LC020A-I/ST Datasheet - Page 11

• Manufacturer Part Number: 25LC020A-I/ST
• Description: IC EEPROM 2KBIT 10MHZ 8TSSOP
• Manufacturer: Microchip Technology

Specifications of 25LC020A-I/ST

• Memory Size: 2K (256 x 8)
• Format - Memory: EEPROMs - Serial
• Memory Type: EEPROM
• Speed: 10MHz
• Interface: SPI, 3-Wire Serial
• Voltage - Supply: 2.5 V ~ 5.5 V
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 8-TSSOP
• Memory Configuration: 256 X 8
• Ic Interface Type: SPI
• Clock Frequency: 10MHz
• Supply Voltage Range: 2.5V To 5.5V
• Memory Case Style: TSSOP
• No. Of Pins: 8
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

2.6
The Write Status Register instruction (WRSR) allows
the user to write to the nonvolatile bits in the STATUS
register as shown in Table 2-2. See Figure 2-7 for the
WRSR timing sequence. Four levels of protection for
the array are selectable by writing to the appropriate
bits in the STATUS register. The user has the ability to
write-protect none, one, two, or all four of the
segments of the array as shown in Table 2-3.
FIGURE 2-7:
© 2007 Microchip Technology Inc.
SCK
Note:
CS
SO
SI
Write Status Register Instruction
(WRSR)
An internal write cycle (T
sequence.
0
0
0
WRITE STATUS REGISTER TIMING SEQUENCE (WRSR)
1
0
Instruction
2
0
3
WC
0
) is initiated on the rising edge of CS after a valid write STATUS register
4
0
5
High-Impedance
Preliminary
0
6
1
7
25AA020A/25LC020A
TABLE 2-3:
7
8
BP1
0
0
1
1
6
9
Data to STATUS register
10
5
11
4
ARRAY PROTECTION
BP0
0
1
0
1
12
3
13
2
Array Addresses
Write-Protected
(C0h-FFh)
(80h-FFh)
(00h-FFh)
14
upper 1/4
upper 1/2
1
DS21833D-page 11
none
all
15
0