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34AA02-I/P Arkusz danych(PDF) 13 Page - Microchip Technology

Numer części 34AA02-I/P
Szczegółowy opis  2K I2C Serial EEPROM Software Write-Protect
PDF  32 Pages
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Producent  MICROCHIP [Microchip Technology]
Strona internetowa  http://www.microchip.com
Logo MICROCHIP - Microchip Technology

34AA02-I/P Arkusz danych(HTML) 13 Page - Microchip Technology

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© 2008 Microchip Technology Inc.
DS22029D-page 13
34AA02/34LC02
TABLE 7-2:
ACKNOWLEDGE TABLE FOR WRITE OR WRITE PROTECTION WITH R/W = 0
TABLE 7-3:
ACKNOWLEDGE TABLE FOR WRITE OR WRITE PROTECTION WITH R/W = 1
TABLE 7-1:
SOFTWARE WRITE PROTECTION INSTRUCTION SET WP = 0
Address Pins
Device Type Identifier
Chip Select Bits
R/W
A2
A1
A0
B7
B6
B5
B4
B3
B2
B1
B0
SWP
VSS
VSS
VHV
01
1
0
0
0
1
0
CSWP
VSS
VCC
VHV
01
1
0
0
1
1
0
PSWP
A2
A1
A0
01
1
0
A2
A1
A0
0
Read SWP
VSS
VSS
VHV
01
1
0
0
0
1
1
Read CSWP
VSS
VCC
VHV
01
1
0
0
1
1
1
Read PSWP
A2
A1
A0
01
1
0
A2
A1
A0
1
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 on the 34XX02.
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
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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