AT88SC0104CA-TU Atmel, AT88SC0104CA-TU Datasheet - Page 14

• Manufacturer Part Number: AT88SC0104CA-TU
• Manufacturer: Atmel

Specifications of AT88SC0104CA-TU

• Operating Temperature (max): 85C
• Operating Temperature (min): -40C
• Mounting: Surface Mount
• Pin Count: 8
• Operating Temperature Classification: Industrial
• Lead Free Status / RoHS Status: Compliant

Figure 13-1. Synchronous 2-Wire Protocol
Note:
13.2
Figure 13-2. Asynchronous T = 0 Protocol (Gemplus Patent)
14. Initial Device Programming
14
Five clock pulses must be sent before the first command is issued.
Asynchronous T = 0 Protocol
AT88SC0104CA [Preliminary]
CLK-SCL
CLK-SCL
I/O-SDA
I/O-SDA
RST
V cc
RST
V cc
This power-up sequence complies to ISO 7816-3 for a cold reset in smart card applications.
The device will respond with a 64-bit ATR code, including historical bytes to indicate the memory
density within the CryptoMemory family.
Once asynchronous mode has been selected, it is not possible to switch to synchronous mode
without first powering off the device.
Enabling the security features of CryptoMemory requires prior personalization. Personalization
entails setting up of desired access rights by zones, passwords and key values, programming
these values into the configuration memory with verification using simple WRITE and READ
commands, and then blowing fuses to lock this information in place.
Gaining access to the configuration memory requires successful presentation of a secure (or
transport) code. The initial signature of the secure (transport) code for the AT88SC0104CA
device is $DD 42 97. This is the same as the WRITE 7 password. The user may elect to change
the signature of the secure code anytime after successful presentation.
• V
• Set I/O (SDA) in receive mode.
• Provide a clock signal to CLK (SCL).
• RST goes high after 400 clock cycles.
CC
goes high; RST, I/O (SDA) and CLK (SCL) are low.
1
2
3
4
5
ATR
5200AS–CRYPT–6/08