參數(shù)資料
型號(hào): AK6510CM
元件分類: EEPROM
英文描述: EEPROM
中文描述: EEPROM的
文件頁(yè)數(shù): 7/17頁(yè)
文件大?。?/td> 123K
代理商: AK6510CM
ASAHI KASEI
[AK6510C/12C]
DAP02E-02
2002/07
- 7 -
WRSR (WRITE STATUS REGISTER)
The WRSR instruction can set the Write Protect Block size of the memory array.
AK6510C/12C has 4 Blocks of memory arrays. Write Protect Block size can be selected from 1/4,
1/2 and whole memory array. The block, which is set by Write Protect, is Read only.
BP0 bit, BP1 bit, and WPEN bit are programmable with EEPROM memory cell bits. The
characteristics of those bits (WREN, tE/W, RDSR) are same as the EEPROM memory array.
WP pin function can be set by WPEN (WRITE PROTECT ENABLE) bit which is defined by WRSR
function. When WP pin is low level and WPEN bit is "1", the WRITE function to Status register,
which has WPEN bit and BP0/BP1 bit, and to Write Disable Block is not performed. Then WRITE
function is performed only to the Write enable block.
When WP pin is "1" or WPEN bit is "0", then the function of WP pin is disabled and WRITE function to
the Status Register is performed.
WREN function should be done before WRSR function. And after the Programming function,
AK6510C/12C becomes Write Disable status automatically.
WRSR
WPEN
Bit
WP
Pin
WEN
Bit
Write Protected
Block
Not Protected
Block
Status Register
0
X
0
WRITE Disable
WRITE Disable
WRITE Disable
0
X
1
WRITE Disable
WRITE Enable
WRITE Enable
1
Low
0
WRITE Disable
WRITE Disable
WRITE Disable
1
Low
1
WRITE Disable
WRITE Enable
WRITE Disable
X
High
0
WRITE Disable
WRITE Disable
WRITE Disable
X
High
1
WRITE Disable
WRITE Enable
WRITE Enable
Table 3. WPEN function
Status Register bits
BP1
0
0
1
1
Write Protected Block
AK6510C
none
C00h - FFFh
800h - FFFh
000h - FFFh
BP0
0
1
0
1
AK6512C
none
1800h - 1FFFh
1000h - 1FFFh
0000h - 1FFFh
Table 4. Write Protected Block Size
Hi-Z
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
0
0
0
0
0
0
1
Bit1
Bit2
Bit3
Bit4
Bit5
Bit6
Bit7
Bit0
CS
SCK
SI
SO
X = don’t care
X
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