34LC02 MICROCHIP [Microchip Technology], 34LC02 Datasheet - Page 13

• Manufacturer Part Number: 34LC02
• Manufacturer: MICROCHIP [Microchip Technology]

TABLE 7-1:
TABLE 7-2:
TABLE 7-3:
 2010 Microchip Technology Inc.
1.
2.
Permanently Protected
Protected with SWP
A0 is used to detect V
B3, B2 and B1 are compared to the A2, A1 and A0 external pins, respectively on the 34XX02.
Not Protected
Permanently Protected
Protected with SWP
Status
Read CSWP
Read PSWP
Read SWP
Not protected
CSWP
PSWP
SWP
Status
SOFTWARE WRITE PROTECTION INSTRUCTION SET WP = 0
ACKNOWLEDGE TABLE FOR WRITE OR WRITE PROTECTION WITH R/W = 0
ACKNOWLEDGE TABLE FOR WRITE OR WRITE PROTECTION WITH R/W = 1
Protect
HV
Write-
0
1
0
1
x
for the SWP and CSWP commands.
V
V
V
V
A2
A2
A2
WRITE in lower 128
WRITE in lower 128
PSWP, SWP, or CSWP
PSWP, SWP, or CSWP
SS
SS
SS
SS
PSWP, SWP, CSWP
Address Pins
PAGE or BYTE
PAGE or BYTE
PAGE or BYTE
PAGE or BYTE
PAGE or BYTE
Instruction
V
V
WRITE
WRITE
WRITE
V
V
A1
A1
A1
bytes
CSWP
PSWP
bytes
CSWP
PSWP
SWP
SWP
CC
CC
SS
SS
PSWP, SWP, CSWP
PSWP, SWP, CSWP
Instruction
V
V
V
V
A0
A0
A0
HV
HV
HV
HV
CSWP
PSWP
SWP
ACK
Device Type Identifier
Ack
Ack
Ack
Ack
Ack
Ack
Ack
Ack
Ack
Ack
Ack
Ack
Ack
Ack
No
No
No
B7
0
0
0
0
0
0
Don’t Care
Don’t Care
Don’t Care
Don’t Care
Don’t Care
Don’t Care
Don’t Care
Don’t Care
Don’t Care
B6
Address
Address
Address
Address
Address
Address
1
1
1
1
1
1
B5
1
1
1
1
1
1
34AA02/34LC02
B4
0
0
0
0
0
0
ACK
Ack
Ack
Ack
Ack
Ack
Ack
Ack
Ack
Ack
Ack
Ack
Ack
Ack
Ack
No
No
No
B3
A2
A2
0
0
0
0
Don’t Care No Ack
Don’t Care No Ack
Don’t Care
Don’t Care
Don’t Care No Ack
Don’t Care No Ack
Don’t Care No Ack
Don’t Care
Don’t Care No Ack
Data Byte
Chip Select Bits
Address
Data
Data
Data
Data
No Ack
No Ack
B2
A1
A1
0
1
0
1
ACK
Ack
Ack
Ack
No Ack
No Ack
No Ack
No Ack
DS22029E-page 13
ACK
Ack
Ack
Ack
Ack
B1
A0
A0
1
1
1
1
Cycle
Write
R/W
Yes
Yes
Yes
Yes
No
No
No
No
No
No
No
No
No
No
B0
0
0
0
1
1
1