25AA02E48 Microchip Technology, 25AA02E48 Datasheet - Page 11

• Manufacturer Part Number: 25AA02E48
• Description: 2K SPI Bus Serial EEPROM
• Manufacturer: Microchip Technology

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:
 2010 Microchip Technology Inc.
SCK
CS
SO
SI
Write Status Register Instruction
(WRSR)
0
0
0
WRITE STATUS REGISTER TIMING SEQUENCE (WRSR)
1
0
Instruction
2
0
3
0
4
0
5
High-Impedance
0
6
1
7
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
25AA02E48
13
2
Array Addresses
Write-Protected
(C0h-FFh)
(80h-FFh)
(00h-FFh)
14
upper 1/4
upper 1/2
1
DS22123B-page 11
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none
all
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