Datasheet

28
Atmel AT30TSE002B [DATASHEET]
8711G–SEEPR–5/12
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).