SLE 55R16

Short Product Information

6 / 8

2001-01-31

1.1

Circuit Description

SLE 55R16 consists of a EEPROM memory unit, an analog interface for contactless energy and

data transmission, a control and a crypto unit.

Power

Power Circuit

Rectifier

Clock Extractor

Power on Reset

Voltage Regulator

Data

Memory

Access

IO Command

Authentication

Control Unit

Analog

Contactless

Interface

Operational

Mode

Crypto Unit

Memory Unit

LB

LA

Anticollision

Clock

Figure 4 Block diagram of SLE 55R16

• Analog Contactless Interface consists of:

–

Rectifier

–

Voltage Regulator

–

Power on Reset

–

Modulator / Demodulator

–

Clock Extractor

• Operational mode

The access to the memory depends on the actual mode of SLE 55R16; the memory is

accessed according to plain or protected mode when the PICC is selected.

• Crypto Unit

Generates random numbers, checks and calculates message authentication code (MAC).

• Memory Unit

2560 bytes organised in 256 pages with 8 + 2 bytes each.

• Control Unit

—

Decoding and execution of the commands

—

Bit oriented anticollision method with 4 or 7 byte long serial numbers (complying to

ISO/IEC 14443-3

− cascade level 1 and 2 are supported). It allows the recognition of

several cards in the field which may be selected and operated in sequence.

—

Access to key-protected sectors is only permitted after authentication with an appropriate

key. Only one sector is opened within a session. One sector is optionally configurable

without key protection and authentication.

—

Memory access to the pages according to the individual access conditions programmed

for every page and every key