AT88SC1608-10SU-00 Atmel, AT88SC1608-10SU-00 Datasheet - Page 12

• Manufacturer Part Number: AT88SC1608-10SU-00
• Description: IC EEPROM 16KBIT 1MHZ 8SOIC
• Manufacturer: Atmel
• Series: CryptoMemory®r

Specifications of AT88SC1608-10SU-00

• Format - Memory: EEPROMs - Serial
• Memory Type: EEPROM
• Memory Size: 16K (2K x 8)
• Speed: 1MHz
• Interface: Serial
• Voltage - Supply: 2.7 V ~ 5.5 V
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 8-SOIC (3.9mm Width)
• Operating Temperature (max): 85C
• Operating Temperature (min): -40C
• Package Type: SOIC
• Mounting: Surface Mount
• Pin Count: 8
• Operating Temperature Classification: Industrial
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

10.7
Figure 10-7. Verify Password
10.8
12
S
T
A
R
T
1 0 1 1 0 1 0 0
Verify Password
Initialize Authentication
Command
AT88SC1608
A
C
K
Figure 10-6. Answer-to-reset
Once the sequence is completed and a stop condition is issued, there is a nonvolatile write cycle
to update the associated attempts counter. In order to know whether or not the inserted pass-
word was correct, the device requires the host to perform an ACK polling sequence with the
specific device address of $B5. When the write cycle has been completed, the ACK polling com-
mand ($B5, Read Configuration Zone) will return a valid ACK. This command should be followed
by the byte address of the respective PAC. If the password presented is valid, the PAC will be
set to $FF. If the password was not valid, the PAC will have one additional bit written to “0”.
Figure 10-8. Initialize Authentication
Note:
S
T
A
R
T
* * * * r p
1 0 1 1 0 1 1 0
Command
R
E
S
E
T
1. Pw: Password, 3 bytes
2. The four bits “rppp” indicate the password to compare:
Q0: Host random number, 8 bytes
Index
0 0 1 1 0 1 0 0 0 1 0 1 0 1 0 1
D
r = 0: Write password
r = 1: Read password
ppp: Password set number
(rppp = 0111 for the secure code)
0
2
p
1
p
$2C
0
–
A
C
K
A
C
K
D
D
7
7
D
7
Q0(0)
–
Pw(0)
D
–
8
D
$AA
0
A
C
K
–
D
D
0
15
A
C
K
D
D
Q0(1)
15
15
–
1 0 1 0 1 0 1 0 0 0 0 0 0 1 0 1
D
Pw(1)
16
–
D
$55
8
A
C
K
–
. . .
D
8
A
C
K
D
D
63
23
D
23
D
Q0(7)
–
24
Pw(2)
$A0
–
D
–
56
0971H–SMEM–6/08
A
C
K
D
S
T
O
P
16
D
31
A
C
K
S
T
O
P