73S1121F
EMV Smart-Card Terminal Controller
with Built-in Dual ISO-7816 Interface and USB
DATA SHEET
ISO-7816 Interfaces and UART
The feature set of the TERIDIAN 73S1121F includes two built-in smart-card interfaces, controlled by an ISO-7816
compliant sequencer. Each built-in smart card interface has its own DC-DC converter, able to generate the card
power supply, VCC=3V or 5V. The sequencer handles the activation / deactivation of the card signals. Each card
interface includes an input for the card presence switch (programmable polarity) and auxiliary I/O lines for C4 / C8
signals. A hardware ISO-7816 UART with a dedicated FIFO allows easy implementation of asynchronous card
protocols T=0 and T=1. This UART can be bypassed to allow a firmware UART to handle other protocols such as
synchronous card protocols. Control and use of the ISO-7816 UART is widely and easily configurable with
dedicated registers located in XRAM. A 4-line interface enables the 73S1121F to control additional external
smart card (ICC) interfaces, typically for multiple-SAM configurations. The ISO-7816 UART can be shared
between all the smart card interfaces (internal and external).
Communication, Man-Machine Interface and I/Os
The 73S1121F has a full-speed (12Mbps) USB slave interface with 4 endpoints for implementation of computer-
connected terminals. A standard 8052 serial UART allows the 73S1121F to communicate with any host or
peripheral on a serial link, at a data transmission rate from 1200 to 115kbps. Communication with a computer
through RS232 can be easily implemented only using an external level shifter.
Keyboard implementation is supported with a built-in 5x6 keyboard interface with hardware scanning and
debouching. It also features a scrambling capability (change of the scanning order).
7 I/O lines are dedicated to control an external standard LCD driver, allowing a wide choice of LCDs to be
controlled by the 73S1121F, such as 7-wire, Hitachi-type HD44780.
Additional input/outputs feature 8 user I/Os, 4 general purpose I/Os (GPIOs, that are compatible with any
interfacing voltage up to 5.5V), and 3 analog inputs for voltage detection (for battery monitoring or any DC voltage
comparison). Each of the analog inputs can be multiplexed to a comparator pre-set to a threshold voltage
adjustable between 0.2V to 2.5V (8 possible levels).
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©
2005 TERIDIAN Semiconductor Corporation
Rev 2.3
TERIDIAN [ TERIDIAN SEMICONDUCTOR CORPORATION ]
