This document describes the hardware features of the ST23YT66 smartcard MCU, including the enhanced 8/16-bit ST23 CPU core, 16 Mbytes of linear addressable memory, 210 Kbytes of User ROM, 6.2 Kbytes of User RAM, 2 Kbytes of NESCRYPT RAM, and 66 Kbytes of User EEPROM.
The ST23YT66 is a serial access microcontroller based on an enhanced STMicroelectronics 8/16-bit CPU core. It is specifically designed for secure smartcard applications, offering high reliability through CMOS EEPROM technology with 30-year data retention and up to 500,000 erase/write cycles.
The device includes a full-speed USB 2.0 interface with a hardware accelerator for efficient AutoPlay mode, allowing rapid upload of companion serial Flash memory content. It also features an SPI bus for user interfaces, multiple timers, and various security mechanisms including a true random number generator compliant with AIS-31 class P2.
| CPU Core | Enhanced 8/16-bit ST23 CPU core |
|---|---|
| User ROM Size | 210 Kbytes |
| User RAM Size | 6.2 Kbytes |
| EEPROM Capacity | 66 Kbytes |
| Operating Temperature Range | 0 to 70 °C |
| Supply Voltage | 3V to 5.5V |
| Maximum CPU Clock Frequency | 29 MHz |
The product is specially designed for secure smartcard applications.
Yes, it features a full-speed USB 2.0 interface with hardware acceleration.
The device offers 30-year data retention.