AT34C02C_08 View Datasheet(PDF) - Atmel Corporation
Part Name
Description
Manufacturer
AT34C02C_08
Atmel Corporation
AT34C02C_08 Datasheet PDF : 25 Pages
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AT34C02C
Table 7-3. WP Connected to GND or Floating
WP Connected to GND or Floating
Command
R/W Bit
Permanent
Write Protect
Register
PSWP
1010
R
X
1010
W
Programmed
1010
W
X
1010
W
Not Programmed
Reversible
Write Protect
Register RSWP
X
X
Programmed
Not Programmed
Acknowledgme
nt from Device
ACK
ACK
ACK
ACK
Action from Device
Can write to second Half (80H - FFH) only
Can write to second Half (80H - FFH) only
Can write to full array
Read PSWP
R
Programmed
X
Read PSWP
R
Not Programmed
X
Set PSWP
W
Programmed
X
Set PSWP
W
Not Programmed
X
No ACK
ACK
No ACK
ACK
STOP - Indicates permanent write protect register is
programmed
Read out data don't care. Indicates PSWP register
is not programmed
STOP - Indicates permanent write protect register is
programmed
Program permanent write protect register
(irreversible)
Read RSWP
Read RSWP
Set RSWP
Set RSWP
Clear RSWP
Clear RSWP
R
X
Programmed
No ACK
R
X
Not Programmed
ACK
W
X
Programmed
No ACK
W
X
Not Programmed
ACK
W
Programmed
X
No ACK
W
Not Programmed
X
ACK
Table 7-4. WP Connected to Vcc
STOP - Indicates reversible write protect register is
programmed
Read out data don't care. Indicates RSWP register
is not programmed
STOP - Indicates reversible write protect register is
programmed
Program reversible write protect register (reversible)
STOP - Indicates permanent write protect register is
programmed
Clear (unprogram) reversible write protect register
(reversible)
WP Connected to Vcc
Comman
d
R/W Bit
Permanent
Write Protect
Register PSWP
1010
R
X
1010
W
X
Reversible
Write Protect
Register RSWP
X
X
Acknowledgme
nt from Device
ACK
ACK
Action from Device
Read array
Device Write Protect
Read
PSWP
R
Programmed
X
Read
PSWP
R
Not Programmed
X
No ACK
ACK
STOP - Indicates permanent write protect register is
programmed
Read out data don't care. Indicates PSWP register is
not programmed
11
5185D–SEEPR–1/08
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