AT88SC1604 chip parameters and description

AT88SC1604 designed by the logic of the United States ATMEL Smart Card chip. It has a storage capacity of 15,704, is the logical encryption larger capacity memory card in a product chip. It has the complete isolation of multi-regional structure, the "one card for multiple use" feature in the hardware is fully protected; and its "control read and write" and "Control Erase" password system allows two sets of cards in issue management and operation of safe and reliable use of the two sides will be practical.

Features:

(1) AT88SC1604 memory chips are more than one logical partition structure.

In addition to the main memory divided into a specific symbol data area and control data area, the application data will be divided into four completely isolated
Sub-district, and in each sub-area with their own reading and writing control of symbols and write / erase the password and the password input error
Counters and other logic control.

(2) chip for the serial transmission, and meet the ISO / IEC 7816-3 synchronization protocol.

(3) chip with low power CMOS process, the time to read every word bits to 2 μs, write cycle is 5ms.

(4) chip design improves the circuit voltage to ensure the use of a single +5 V supply voltage can be completed on-chip read / write / erase
And other kinds of programming operations.

(5) on-chip memory cell has at least 10,000 times the erase / rewrite cycles. Data retention period of 10 years.

Chip storage structures

AT88SC1604 chip maker into the code area code area distributors, users secure password area, compare the user password count area, personal code area and four application areas. Password for each application area by area, area code comparison count, erase the password area and erase the password comparison count area, applications data area and memory test Area.

(1) Manufacturer code area (FZ)

The area used to record the card chip manufacturer specific information (such as: production batch number, date, and particular characteristics of the code developed
), By the manufacturer to write in the chip factory. Fuse in the control of the area (FUSHl) did not fuse, the area of the memory cell can be as ordinary as EEPROM memory cell erase and rewrite. Once the fuse blows, the written "manufacturer code" will not be changed.

(2) publisher code area (IZ)

The area used to record the card issuer specific information (for example: issue batch number, date, region-specific user ID number and range of characteristics such as code). When the control is not blown fuse in this region, the area contents of the storage units are free to erase or rewrite. In the personal process is complete, control of the area of fuse (FUSH2) fuse, can be injected into the "Issuer code" completely cured. This code is also the authenticity of identification cards, an important distinction between categories of identity card applications.

(3) Personal code area (CPZ)

The area used to store personal identity information. Chip area by using the "user password" protected. When the "user password" more successful, erasable read-write area. "Password" relatively unsuccessful, the area can only be read but not write and erase.

(4) user password District (SC)

The password area is the memory of "total control switch." Before use, pre-entered by the authorized holder of a security code as the "reference the word" stored in the storage area inside. Use, you must enter a "check password." Chip will enter the "verification code" and the internal memory of the "reference character" 11 more. If the same comparison, IC cards will be open to the entire chip memory (including the District of control code and application data area). District's "security code" area SCn (n = l, 2,3,4) and the SC's role is entirely similar. For each partition password District SCn (n = 1,2,3,4), its corresponding comparison operation to be "application area code" Comparative counter (SnAC) count of control. When the 8th consecutive incorrect password is entered, SCn will be locked.

(5) Comparison of counting area code (SCAC)

The area of the continuous input to the cumulative number of wrong password. When the continuous comparison of 8 incorrect operation, the chip will be locked. After the chip is locked and will refuse any erase, write and compare operations command. The area is 8-bit length, bit-write mode operation. Chip initialization is all "1" state, that is, read out the value "FFH". Comparison of the password each time, press the order from high to low to find the first "1" bit, this bit was "0", then enter the new "Check password" and the original is stored in the SC District's "character reference" for comparison. Comparison operation itself is completed chip itself, but the comparison is marked by setting the SV to determine that the SV is set when the more successful "one." Comparison is not successful, SV to maintain the original "0" state. Comparison of errors in a row 8 times more per course of action after the counter counts were "7FH", "3FH", "1FH", "0FH", "07H", "03H", "01H", "00H" . When the counter for the "00H", the follow-up comparison of operational command as can not "SCAC" area to find a "1" position, which refused to continue the implementation of chip compare operation. SnAC (n = 1,2,3,4) the role and SCAC is similar. Operational control are the same. SCAC is the only limit on the comparison of SC operation area. The SnAC is relatively restricted area on the SCn operation. SCAC highest level of control. When the SCAC for the "00H", the chip within the blocked area of the SC comparison operation, so that comparison on SCn also be banned. If the SCAC non-"00H" value, in comparison to the SC area code after a successful operation, SCn able to compare the operation of the state value from the SnAC area determined. SnAC District 8 more input in the continuous process, each time after the operation compared with the SCAC counter counts the same as the value of 8. (That were "7FH", "3FH", "1FH", "0FH", "07H", "03H", "OlH", "00H") when SnAC to "00H", then "Application n District" will be locked.

(6) Erase the password area (EZn, n = l.2, 3,4)

Erase the area used to store the password application area of control operations. These codes generally used by the publisher. Processing in the personal input of the last set of "erase password", after the chip fuse FUSE2 fuse will "erase password" stored in the area. The area no longer can read, write and erase operation can only be compared. For use during the erase operation on the application area, must first transport the corresponding EZ area a "erase password" In contrast, in the "erase the password more counters," not "00H" of the case, If you compare the two exactly the same code, the corresponding application area of the unit allows erase, or erase operation will be banned from the implementation.

(7) Erase the password compare count area (EnAC, n = l, 2,3,4)

Erase the password and compare the role of counting area similar to the role of SCAC. Erase all application areas it entered the wrong password continuous cumulative number of times. Up to 8 consecutive incorrect password comparisons, the area controlled by the application of erasure Jibei locked area, resulting in the application area may be read and written to allow a single state.

(8) application data area (AZn, n = 1,2,3,4)

The area mainly to the users. Data storage systems for records and identification cards and other information. Application data area is written and read by the area's first two Pn and Rn and the SV flag state control of the area erased by the erase operation code control. AT88SC1604 designed four completely separate partition, which partition 1 to 3 units of capacity are the 4K-bit, 4 cell division capacity of 3.6K bits.

(9) storage area test area (MTZ)

After the area is mainly used for chip production unit of the EEPROM array performance testing in the area of the control area without any protection of state and flag state, allowing the district to read, write and erase operations, but can not compare operation.

Typical applications

Based on the characteristics of the 1604 chip, but also with the rapid development of IC card technology, financial institutions, government agencies, corporations, educational sector and other fields demand more and more urgent, more and more widely applied.