28
Atmel AT30TSE002B [DATASHEET]
8711GSEEPR5/12
Table 12-1. EEPROM Write Protection
Table 12-2. VHV
Table 12-3. EEPROM Software Write Protection
Command
Pin
Preamble
R/W
A2
A1
A0
B7
B6
B5
B4
B3
B2
B1
B0
Set PSWP
A2
A1
A0
0
1
1
0
A2
A1
A0
0
Set RSWP
0
0
VHV
0
1
1
0
0
0
1
0
Clear RSWP
0
1
VHV
0
1
1
0
0
1
1
0
Min
Max
Units
VHV
7
10
V
Command
R/W
Bit
Permanent Write
Protect Register
PSWP
Reversible Write
Protect Register
RSWP
Acknowledgement
from Device
Action from Device
1010
R
X
X
ACK
1010
W
Programmed
X
ACK
Can write to second Half (80H - FFH) only.
1010
W
X
Programmed
ACK
Can write to second Half (80H - FFH) only.
1010
W
Not
Programmed
Not
Programmed
ACK
Can write to full array.
Read PSWP
R
Programmed
X
No ACK
Stop Indicates Permanent Write Protect
Register is programmed.
Read PSWP
R
Not
Programmed
X
ACK
Read out data don't care. Indicates PSWP
Register is not programmed.
Set PSWP
W
Programmed
X
No ACK
Stop Indicates Permanent Write Protect
Register is programmed.
Set PSWP
W
Not
Programmed
X
ACK
Program Permanent Write Protect Register
(irreversible).
Read RSWP
R
X
Programmed
No ACK
Stop Indicates Reversible Write Protect
Register is programmed.
Read RSWP
R
X
Not
Programmed
ACK
Read out data don't care. Indicates RSWP
Register is not programmed.
Set RSWP
W
X
Programmed
No ACK
Stop Indicates Reversible Write Protect
Register is programmed.
Set RSWP
W
X
Not
Programmed
ACK
Program Reversible Write Protect Register
(reversible).
Clear RSWP
W
Programmed
X
No ACK
Stop Indicates Permanent Write Protect
Register is programmed.
Clear RSWP
W
Not
Programmed
X
ACK
Clear (unprogram) Reversible Write Protect
Register (reversible).
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