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ST7GEME4 Datasheet(PDF) 1 Page - STMicroelectronics |
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ST7GEME4 Datasheet(HTML) 1 Page - STMicroelectronics |
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1 / 28 page  September 2007 Rev 2.0 1/28 1 ST7GEME4 Full-speed USB MCU with smartcard firmware and EMV/non-EMV interface Features ■ Clock, reset and supply management – Low voltage reset – Halt power saving mode – PLL for generating 48 MHz USB clock using a 4 MHz crystal ■ USB (Universal Serial Bus) interface – USB 2.0 compliant – CCID V1.0 – Full speed, hubless – Bus-powered, low consumption ■ Serial RS232 interface – Transmission rate: 9.6 Kbps to 115 Kbps – Format: 8-bit, no parity – Auto baud rate – CCID V1.0 on serial TTL link ■ ISO 7816-3 UART interface – 4 Mhz clock generation – Synchronous/Asynchronous protocols (T=0, T=1) – Automatic retry on parity error – Programmable baud rate from 372 to 11.625 clock pulses (D=32/F=372) – Card insertion/removal detection ■ Smartcard power supply – Selectable card VCC: 1.8 V, 3 V, and 5 V – Internal Step-up converter for 5V supplied Smartcards (with a current of up to 55mA) using only two external components. – Programmable smartcard internal voltage regulator (1.8 to 3.0 V) with current overload protection and 4 kV ESD protection (Human Body Model) for all smartcard interface I/Os ■ Development tools – Application note on PCB recommendations and component bill of materials – Full hardware/software kit for performance evaluation Description The ST7GEME4 is an 8-bit microcontroller dedicated to smartcard reading applications. It has been developed to be the core of smartcard readers communicating through a serial or USB link. It is pre-programmed using Gemplus software, and offers a single integrated circuit solution with very few external components. 24 1 VFQFPN24 SO24(9U) Table 1. Device summary Features Order codes ST7GEME4M1 ST7GEME4U1 Program memory 16K ROM User RAM + USB data buffer (bytes) 512 + 256 Peripherals USB Full-Speed (7 Ep), TBU, Watchdog timer, ISO 7816-3 Interface Operating Supply 4.0 to 5.5 V Package SO24 VFQFPN24 CPU Frequency 4 or 8 MHz Operating temperature 0 to +70 °C www.st.com |
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