stf1001 Shanghai Fudan Microelectronics Co., Ltd., stf1001 Datasheet - Page 8

• Manufacturer Part Number: stf1001
• Description: Stf1001 Telephone Ic Card Chip
• Manufacturer: Shanghai Fudan Microelectronics Co., Ltd.

5.
Figure1．Entry of Transport Code
STF1001 Telephone IC Card Chip
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Transport Code Protection
The chip is protected with a 3bytes Transport Code (Issuer Mode). The Transport Code is
programmed in counter stage 1 (address 96~103), 2 (address 88~95) and 3 (address 80~87) and
the counter stage 4 (address 72~79) has the functionality of the Error Counter. It limits the
Transport Code verification to 8 trials.
In the state the Identification Area (address 0~63) and the Error counter (address 72~79) are
readable, and only the Error counter is programmed. Only after correct verification of the
Transport Code the whole memory is readable and programmed.
The following procedure has to be applied to verify the Transport Code:
The Transport Code mechanism is active until the personalization bit (address 64) is written (=”0”).
The chip is irreversibly blocked for further use if all Error Counter bits are written without correct
verification of the Transport Code.
Address Reset.
Increment Error Counter by 1. Increment address counter to free Error Counter bit (=”1”) in the
address from 72 to 79. Apply write operation on the addressed bit
Starting at address 80 the 24bit Transport Code has to be presented at I/O. Increment address
counter from 80 to 103 and present data during CLK high. The internal comparison occurs
during every CLK low. Add one clock pulse to finish the comparison.
Ver 1.1
Specification
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