參數(shù)資料
型號(hào): 25LC320
廠商: Microchip Technology Inc.
英文描述: 32K 2.5V SPI Bus Serial EEPROM
中文描述: 32K的2.5V的SPI總線串行EEPROM
文件頁(yè)數(shù): 6/12頁(yè)
文件大小: 87K
代理商: 25LC320
25LC320
DS21158B-page 6
Preliminary
1996 Microchip Technology Inc.
FIGURE 2-1: WRITE TO STATUS REGISTER AND/OR ARRAY FLOWCHART
CS Returns High
Continue
WEL = 1
WEL = 1
WP is low
WPEN = 1
Write
to array
Write to
Status Register
Do not write to
Status Register
Write to the
Unprotected Block
Do not write to
Array
No
No
No
No
Yes
Yes
Yes
Yes
No
Yes
No
Yes
To other
Commands
From other
Commands
Write
to Status
Reg
2.3
Write Status Register (WRSR)
The WRSR instruction allows the user to select one of
four protection options for the array by writing to the
appropriate bits in the status register. The array is
divided up into four segments. The user has the ability
to write protect none, one, two, or all four of the seg-
ments of the array. The partitioning is controlled as illus-
trated in Table 2-3.
See Figure 3-6 for WRSR timing sequence.
TABLE 2-3:
ARRAY PROTECTION
BP1
BP0
Array Addresses
Write Protected
none
upper 1/4
0C00h - 0FFFh
upper 1/2
0800h - 0FFFh
all
0000h - 0FFFh
0
0
0
1
1
0
1
1
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