INTRODUCTION The ST72411R devices are members of the ST7 microcontroller family. They are designed for Smartcard reader applications. All ST72411R family devices are based on a common industry-standard 8-bit core, featuring an enhanced instruction set. ■ Memories – 4K Program memory (ROM/FLASH) with read-out protection – In-Situ Programming (remote ISP) for FLASH devices using Smartcard or standard I/O lines – 256-bytes RAM ■ Clock, Reset and Supply Management – Power-on supply at Smartcard insertion – Low supply voltage detection for battery monitoring – Smart Card withdrawal detection – On-chip main clock source – 3 Power saving modes – Clock-out capability for synchronous and asynchronous Smartcards ■ Smartcard Interface – Smart Card Supply Supervisor with: 3V or 5V voltage regulator and current overload protection ■ 15 I/O Ports – 15 multifunctional bidirectional I/O lines with: external interrupt capability (2 vectors), 2 alternate function lines, 5 I/Os for ISO7816-3 Smartcard interface, 1 I/O for Smartcard withdrawal detection ■ Display Driver – LCD driver with 32 segment outputs and 4 backplane outputs able to drive up to 32x4 LCD displays ■ Timer – One 8-bit timer with: 9-bit prescaler, selectable input frequency with external clock input option and event output signal generation capability ■ Instruction Set – 8-bit Data Manipulation – 63 Basic Instructions – 17 main Addressing Modes – 8 x 8 Unsigned Multiply Instruction – True Bit Manipulation ■ Development Tools – Full hardware/software development package
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