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AT34C02CN-SP25-T Datasheet(PDF) 9 Page - ATMEL Corporation

Part # AT34C02CN-SP25-T
Description  Two-wire Automotive Temperature Serial EEPROM with Permanent and Reversible Software Write Protect
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Manufacturer  ATMEL [ATMEL Corporation]
Direct Link  http://www.atmel.com
Logo ATMEL - ATMEL Corporation

AT34C02CN-SP25-T Datasheet(HTML) 9 Page - ATMEL Corporation

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5242B–SEEPR–01/09
AT34C02C
Table 6. Write Protection
Table 7. VHV
Note:
VHV - VCC > 4.8V
Table 8. WP Connected to GND or Floating
Pin
Preamble
RW
Command
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
00
VHV
0
11
00
0
1
0
Clear RSWP
01
VHV
0
11
00
1
1
0
Min
Max
Units
VHV
7
10
V
WP Connected to GND or Floating
Command
R/W Bit
Permanent Write
Protect Register
PSWP
Reversible Write
Protect Register
RSWP
Acknowledgment
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


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