AT88SC0204CA-TH Integrated Circuits (ICs)

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AT88SC0204CA-TH is a 16-Kbit secure EEPROM chip with password protection, which belongs to the memory category. This chip is a complete microcontroller-based secure memory solution for secure authentication and identification applications. It combines 16K bits of EEPROM with a secure authentication coprocessor, 8-bit 8051 microcontroller, 32 bytes of EEPROM for configuration, 4Kbits of ROM for the 8051, and 256 bytes of RAM with up to 3 distinct passwords.

As a kind of memory chip, AT88SC0204CA-TH is mainly used in contactless identification areas such as access control, ATM and POS terminals, computer peripherals, etc. It provides fast and secure programming features to meet the needs of smart card/contactless ID. Its 8051 core is clocked by an oscillator connected to an external crystal and pin, but can also be connected to an external clock source. It also features a dedicated on-chip voltage regulator, which provides the necessary operating conditions for 5V input voltage in the application circuit.

The AT88SC0204CA-TH chip has multiple logical structures, including a secure EEPROM, a volatile EEPROM, and a system data area. The EEPROM can be divided into two parts, the system area and user area. The system area consists of four data blocks with a fixed address, encryption keys, status registers, and identification bytes, which are used for internal control and cannot be overwritten. The user area contains 16K of EEPROM memory, and can be divided into 16 blocks of 1KB, with different passwords. The volatile EEPROM is a 32 bytes\' EEPROM, which can be used for storing configuration data for the chip. The system data area is mainly used for storing the passwords and encryption keys.

AT88SC0204CA-TH implements a secure EEPROM, giving it secure features such as physical protection (using a PIN), secure read/write, and authentication. Physically, it is protected by a random number generator, a 32-bit authentication register, and a 14-bit command register. The random number generator generates an unpredictable random number that helps the system protect against replay attacks, while the command register is used by the 8051 to set up the chip\'s various functions. Additionally, the authentication register stores a 32-bit code that is used to authenticate each command, ensuring secure communication between the chip and host.

AT88SC0204CA-TH also implements a secure write feature. When used in conjunction with the authentication mechanism, it ensures that the data written to the EEPROM can only be accessed by a valid user. In addition, the chip also has a secret write feature, which can only be used after the valid user has been authenticated. This further enhances the data security of the chip.

In terms of its read/write speed, the chip\'s write speed is 20MS/s, and the read speed is 5MS/s, which is relatively fast compared to other memory chips. This allows data to be written and read quickly, making it suitable for applications where quick data processing is required.

Overall, AT88SC0204CA-TH is a secure, fast, and reliable chip for authentication and identification applications. Its secure authentication and write feature, as well as its fast read/write speed make it an ideal memory solution for contactless ID applications.

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