at88sc1608 ATMEL Corporation, at88sc1608 Datasheet - Page 9

• Manufacturer Part Number: at88sc1608
• Description: 8 X 256 X 8 Secure Memory With Authentication
• Manufacturer: ATMEL Corporation

Command Definitions and Protocols
Table 5. Device Commands
Set User Zone Address
0971G–SMEM–04/04
Read Configuration Zone
Write Configuration Zone
Set User Zone Address
Initialize Authentication
Verify Authentication
Read User Zone
Write User Zone
Verify Password
Description
The password and authentication may be presented at any time and in any order. If the
trials limit has been reached, i.e., the 8 bits of the attempts counter have been written,
the password verification or authentication process will not be taken into account.
The communications protocol is based on the popular two-wire serial interface. Note
that the most significant bit is transmitted first.
Figure 4. Set User Zone Address
Note:
At power-on, no access to the user zones is allowed until the Set User Zone Address
command occurs. This command sets the three most significant bits of the byte
address, corresponding to the user zone address. This address stays valid until the host
sends a new one and as long as the chip is powered.
Code HEX
$B0
$B1
$B4
$B5
$B2
$B3
$B6
$B7
* = Don’t care bit
b7
1
1
1
1
1
1
1
1
S
T
A
R
T
Command
b6
Chip Select
0
0
0
0
0
0
0
0
b5
1
1
1
1
1
1
1
1
A
C
K
* * * * *
b4
1
1
1
1
1
1
1
1
Fuses Index
Command
b3
A
0
0
0
0
0
0
0
0
10
A
9
A
8
AT88SC1608
A
C
K
b2
Instruction
0
0
1
1
0
0
1
1
S
T
O
P
b1
0
0
0
0
1
1
1
1
b0
0
1
0
1
0
1
0
1
9