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34LC02-I/P Arkusz danych(PDF) 12 Page - Microchip Technology

Numer części 34LC02-I/P
Szczegółowy opis  2-Kbit I2C Serial EEPROM Software Write-Protect
PDF  40 Pages
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Producent  MICROCHIP [Microchip Technology]
Strona internetowa  http://www.microchip.com
Logo MICROCHIP - Microchip Technology

34LC02-I/P Arkusz danych(HTML) 12 Page - Microchip Technology

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34AA02/34LC02
DS20002029G-page 12
 2007-2022 Microchip Technology Inc. and its subsidiaries
TABLE 7-1:
SOFTWARE WRITE PROTECTION INSTRUCTION SET WP = 0
Instruction
Address Pins
Device Type Identifier
Chip Select Bits
R/W
A2
A1
A0(1)
B7
B6
B5
B4
B3(2)
B2(2)
B1(2)
B0
SWP
VSS
VSS
VHV
01100010
CSWP
VSS
VCC
VHV
01100110
PSWP
A2
A1
A0
0110
A2
A1
A0
0
Read SWP
VSS
VSS
VHV
01100011
Read CSWP
VSS
VCC
VHV
01100111
Read PSWP
A2
A1
A0
0110
A2
A1
A0
1
Note 1: A0 is used to detect VHV for the SWP and CSWP commands.
2: B3, B2 and B1 are compared to the A2, A1 and A0 external pins, respectively.
TABLE 7-2:
ACKNOWLEDGE TABLE FOR WRITE OR WRITE PROTECTION WITH R/W = 0
Status
Write- Protect
Instruction
ACK
Address
ACK
Data Byte
ACK
Write
Cycle
Permanently
Protected
x
PSWP, SWP, CSWP
No ACK Don’t Care No ACK Don’t Care
No ACK
No
Page or Byte Write
in lower 128 bytes
ACK
Address
ACK
Data
No ACK
No
Protected
with SWP
0
SWP
No ACK Don’t Care No ACK Don’t Care
No ACK
No
CSWP
ACK
Don’t Care
ACK
Don’t Care
ACK
Yes
PSWP
ACK
Don’t Care
ACK
Don’t Care
ACK
Yes
Page or Byte Write
in lower 128 bytes
ACK
Address
ACK
Data
No ACK
No
1
SWP
No ACK Don’t Care No ACK Don’t Care
No ACK
No
CSWP
ACK
Don’t Care
ACK
Don’t Care
No ACK
No
PSWP
ACK
Don’t Care
ACK
Don’t Care
No ACK
No
Page or Byte Write
ACK
Address
ACK
Data
No ACK
No
Not Protected
0
PSWP, SWP or CSWP
ACK
Don’t Care
ACK
Don’t Care
ACK
Yes
Page or Byte Write
ACK
Address
ACK
Data
ACK
Yes
1
PSWP, SWP or CSWP
ACK
Don’t Care
ACK
Don’t Care
No ACK
No
Page or Byte Write
ACK
Address
ACK
Address
No ACK
No
TABLE 7-3:
ACKNOWLEDGE TABLE FOR WRITE OR WRITE PROTECTION WITH R/W = 1
Status
Instruction
ACK
Permanently Protected
PSWP, SWP, CSWP
No ACK
Protected with SWP
SWP
No ACK
CSWP
ACK
PSWP
ACK
Not protected
PSWP, SWP, CSWP
ACK



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