AT88SC0104C-MPTG Atmel, AT88SC0104C-MPTG Datasheet - Page 39
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AT88SC0104C-MPTG
Manufacturer Part Number
AT88SC0104C-MPTG
Description
CRYPTOMEM 1KBIT 4 ZONE MOD P TWI
Manufacturer
Atmel
Series
CryptoMemory®r
Specifications of AT88SC0104C-MPTG
Format - Memory
EEPROMs - Serial
Memory Type
EEPROM
Memory Size
1K (128 x 8)
Speed
5MHz
Interface
I²C, 2-Wire Serial
Voltage - Supply
2.7 V ~ 5.5 V
Operating Temperature
0°C ~ 70°C
Package / Case
M2 P, Smart Card Module
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
7.6.6. Verify Password: $BA
38
Functional
Figure 22. Verify Password Command Functional Description
Read password indices: $10 to $17 for passwords 0 to 7.
Write password indices: $00 to $07 for passwords 0 to 7.
Secure code index: $07 (equivalent to Write 7 Password).
Four password index bits "r" and "ppp" indicate the password to compare:
Figure 23. Verify Password
Once the sequence has been carried out, the device requires the host to perform an ACK polling sequence with the
system read command $B6. In order to know whether the inserted password was correct, the host can read the
corresponding password attempts counter and verify the value is $FF.
Atmel AT88SC0104/0204/0404/0808/1616/3216/6416/12816/25616C
R
S
T
A
T
8-password bytes
Command
r = 0 : Write password
r = 1 : Read password
p
1011 1010
2
p
1
p
0
: Password set number
C
A
K
000r 0p2p1p0
PW Index
Password Index
Command
Host
PW1
PW2
PW3
A
C
K
Parameter 2
xxxx xxxx
A
C
K
0000 0011
Device
N=3
A
C
K
Data x 3
d7--- ---d0
A
C
K
O
S
T
P
5211C–SMIC–01/10