ST7GEME4 Datasheet, PDF (1/28 Pages) STMicroelectronics – Full-speed USB MCU with smartcard firmware and EMV/non-EMV interface

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 V_CC: 1.8 V, 3 V, and 5 V
Table 1. Device summary
24
VFQFPN24
1
SO24(9U)
– 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.
Features
ST7GEME4M1
Order codes
ST7GEME4U1
Program memory
User RAM + USB data buffer (bytes)
Peripherals
16K ROM
512 + 256
USB Full-Speed (7 Ep), TBU, Watchdog timer, ISO 7816-3 Interface
Operating Supply
Package
SO24
4.0 to 5.5 V
VFQFPN24
CPU Frequency
Operating temperature
4 or 8 MHz
0 to +70 °C
September 2007
Rev 2.0
1/28
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