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1 / 102 page  Rev. 1.3 March 2003 1/102 ST7SCR 8-BIT LOW-POWER, FULL-SPEED USB MCU WITH 16K FLASH, 768 RAM, SMARTCARD I/F, TIMER s Memories – Up to 16K of ROM or High Density Flash (HD- Flash) program memory with read/write pro- tection, HDFlash In-Circuit and In-Application Programming. 100 write/erase cycles guaran- teed, data retention: 20 years at 55°C – Up to 768 bytes of RAM including up to 128 bytes stack and 256 bytes USB buffer s Clock, Reset and Supply Management – Low Voltage Reset – 2 power saving modes: Halt and Wait modes – PLL for generating 48 MHz USB clock using a 4 MHz crystal s Interrupt Management – Nested Interrupt Controller s USB (Universal Serial Bus) Interface – 256-byte buffer for full speed bulk, control and interrupt transfer types compliant with USB specification (version 2.0) – On-Chip 3.3V USB voltage regulator and transceivers with software power-down – 7 USB Endpoints: One 8-byte Bidirectional Control Endpoint One 64-byte In Endpoint, One 64-byte Out Endpoint Four 8-byte In Endpoints s 35 or 4 I/O ports: – Up to 4 LED outputs with software program- mable constant current (3 or 7 mA). – 2 General purpose I/Os programmable as in- terrupts – Up to 8 line inputs programmable as interrupts – Up to 20 Outputs – 1 line assigned by default as static input after reset s ISO7816-3 UART Interface: – 4 Mhz Clock generation – Synchronous/Asynchronous protocols (T=0, T=1) – Automatic retry on parity error – Programmable Baud rate from 372 clock puls- es up to 11.625 clock pulses (D=32/F=372) – Card Insertion/Removal Detection s Smartcard Power Supply: – Selectable card VCC 1.8V, 3V, and 5V – Internal Step-up converter for 5V supplied Smartcards (with a current of up to 55mA) us- ing only two external components. – Programmable Smartcard Internal Voltage Regulator (1.8V to 3.0V) with current overload protection and 4 KV ESD protection (Human Body Model) for all Smartcard Interface I/Os s One 8-bit Timer – Time Base Unit (TBU) for generating periodic interrupts. s Development Tools – Full hardware/software development package Table 1. Device Summary TQFP64 14x14 SO24 Features ST7FSCR1R4 ST7SCR1R4 ST7FSCR1E4 ST7SCR1E4 Program memory 16K FLASH 16K ROM 16K FLASH 16K ROM User RAM (stack) - bytes 768 (128) Peripherals USB Full-Speed (7 Ep), TBU, Watchdog timer, ISO7816-3 Interface Operating Supply 4.0 to 5.5V Package TQFP64 SO24 CPU Frequency 4 or 8 Mhz Operating temperature 0°C to +70°C 1 |
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