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SLE66R01PC 数据表(PDF) 21 Page - Infineon Technologies AG

部件名 SLE66R01PC
功能描述  Intelligent 1216 bit EEPROM with Contactless Interface compliant
PDF  55 Pages
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制造商  INFINEON [Infineon Technologies AG]
网页  http://www.infineon.com
标志 INFINEON - Infineon Technologies AG

SLE66R01PC 数据表(HTML) 21 Page - Infineon Technologies AG

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Memory Organization
Data Book
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2011-11-24
4.2.3
Locking mechanism
Bytes LOCK0, LOCK1 allocated in Block 02
H and LOCK2, LOCK3, LOCK4 and LOCK5 allocated in Block 24H
represent the one time field programmable bits which are used to lock the blocks in the specified address range
from block 03
H (OTP Block) to 23H.
Each block in this range can be individually locked to prevent further write access. A locking mechanism of each
block is irreversible, i.e. once the locking information of a particular block (Lx) is set to 1
B it can not be reset back
to 0
B any more. Figure 9 illustrates the locking bytes with the corresponding locking bits.
Furthermore, it is possible to freeze the locking information of some memory areas by setting Block Locking (BL)
bits e.g. if the bit BL 15-10 is set to 1
B then the locking information for the corresponding area (L10 to L15) is not
changeable any more. See the example in the Table 7 below.
Figure 9
Locking and Block Locking Mechanism
The Write One Block (WR1B) command should be used to set the locking or block locking information of a certain
block.
If WR1B is applied to Block 02
H then:
•
the Byte 0 (BCC1) will not be changed
•
the Byte 1 (Configuration Byte) will be changed only if it is not locked
If WR1B is applied to Block 24
H then:
•
the Byte2 [7..4] = Lock4[7..4] and
•
the Byte3 [7..4] = Lock5[7..4] will not be changed neither.
Block 02H
LOCK0
LOCK1
L
7
L
6
L
5
L
4
L
OTP
BL
15-10
BL
9-4
BL
OTP
L
15
L
14
L
13
L
12
L
11
L
10
L
9
L
8
LOCK2 = 00H
LOCK3 = 00H
LOCK4 = 00H
L
23
L
22
L
21
L
20
L
19
L
18
L
17
L
16
0
0
0
0
L
35
L
34
L
33
L
32
L
31
L
30
L
29
L
28
L
27
L
26
L
25
L
24
0
1
2
0
1
2
3
4
5
6
7
1
2
3
4
5
6
7
0
BL
35-31
BL
30-26
BL
25-21
BL
20-16
LOCK5 = 00H
0
0
0
0
1
2
3
4
5
6
7
0
1
2
3
4
5
6
7
0
BCC1
CONFIG
Byte0
Byte1
Byte2
Byte3
Byte0
Byte1
Byte2
Byte3
1
2
3
4
5
6
7
0
1
2
3
4
5
6
7
0
Block 24H



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