AT88SC1608-10PU-00 Atmel, AT88SC1608-10PU-00 Datasheet - Page 11

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

Specifications of AT88SC1608-10PU-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-DIP (0.300", 7.62mm)
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

10.4
10.5
10.6
0971H–SMEM–6/08
Read Fuses
Write Fuses
Answer-to-reset
Figure 10-4. Read Fuses
Note:
The read fuses operation is always allowed. The device only transmits one data byte and waits
for a new command.
Figure 10-5. Write Fuses
The write fuses operation is only allowed under secure code control and no data byte is transmit-
ted by the host. The fuses are blown sequentially: CMA is blown if FAB is equal to “0”, and PER
is blown if CMA is equal to “0”. If the fuses are all “0”s, the operation is canceled and the device
waits for a new command.
Once a stop condition is issued to indicate the end of the host’s write operation, the device ini-
tiates the internal nonvolatile write cycle. An ACK polling sequence can be initiated immediately.
Once blown, these fuses cannot be reset.
If RST is high during SCL clock pulse, the reset operation occurs according to the ISO 7816-10
synchronous answer-to-reset. The four bytes of the answer-to-reset register are transmitted
least significant bit (LSB) first on the 32 clock pulses provided on SCL. Following a RST asser-
tion, all password and authentication access privileges are reset.
The values programmed by Atmel are shown in
F
F
x
x
= 1: fuse is not blown
= 0: fuse is blown
S
T
A
R
T
1 0 1 1 0 1 0 1
Command
S
T
A
R
T
1 0 1 1 0 1 0 0
Command
A
C
K
1 0 0 0 0 0 0 0
Fuses Add
A
C
K
Figure 10-6
1 0 0 0 0 0 0 0
Fuses Add
A
C
K
0 0 0 0 0 F
below.
2
A
C
K
AT88SC1608
F
S
T
O
P
1
F
0
N
A
C
K
S
T
O
P
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