ISO/IEC 15693, is an

ISO ISO is the most common abbreviation for the International Organization for Standardization. ISO or Iso may also refer to: Business and finance * Iso (supermarket), a chain of Danish supermarkets incorporated into the SuperBest chain in 2007 * Iso ...

/ IEC standard for ''vicinity cards'', i.e. cards which can be read from a greater distance as compared with

proximity card A proximity card or prox card also known as a key card or keycard is a contactless smart card which can be read without inserting it into a reader device, as required by earlier magnetic stripe cards such as credit cards and contact type sma ...

s. Such cards can normally be read out by a reader without being powered themselves, as the reader will supply the necessary power to the card over the air (wireless). ISO/IEC 15693 systems operate at the 13.56 MHz

frequency Frequency is the number of occurrences of a repeating event per unit of time. It is also occasionally referred to as ''temporal frequency'' for clarity, and is distinct from ''angular frequency''. Frequency is measured in hertz (Hz) which is eq ...

, and offer maximum read distance of 1–1.5 meters. As the vicinity cards have to operate at a greater distance, the necessary magnetic field is less (0.15 to 5 A/m) than that for a proximity card (1.5 to 7.5 A/m).

Example applications

* Ski pass: each of those has a unique ID and the system knows for how long the pass is valid etc.

Communication to the card

Communication from the reader to the card uses an

amplitude-shift keying Amplitude-shift keying (ASK) is a form of amplitude modulation that represents digital data as variations in the amplitude of a carrier wave. In an ASK system, a symbol, representing one or more bits, is sent by transmitting a fixed-amplitude car ...

with 10% or 100%

modulation index The modulation index (or modulation depth) of a modulation In electronics and telecommunications, modulation is the process of varying one or more properties of a periodic waveform, called the '' carrier signal'', with a separate signal called ...

. The data coding is: ;1 out of 4

pulse-position modulation Pulse-position modulation (PPM) is a form of signal modulation in which ''M'' message bits are encoded by transmitting a single pulse in one of 2^M possible required time shifts. This is repeated every ''T'' seconds, such that the transmitted bi ...

: 2 bits are coded as the position of a 9.44 μs pause in a 75.52 μs symbol time, giving a bit rate of 26.48 kilo bits per second. The

least-significant bit In computing, bit numbering is the convention used to identify the bit positions in a binary number. Bit significance and indexing In computing, the least significant bit (LSB) is the bit position in a binary integer representing the binary ...

s are sent first. ;1 out of 256 pulse-position modulation: 8 bits are coded as the position of a 9.44 μs pause in a 4.833 ms symbol time, giving a bit rate of 1.65 kbit/s.

Communication to the reader

The card has two ways to send its data back to the reader:

Amplitude-shift keying

Amplitude-shift keying Amplitude-shift keying (ASK) is a form of amplitude modulation that represents digital data as variations in the amplitude of a carrier wave. In an ASK system, a symbol, representing one or more bits, is sent by transmitting a fixed-amplitude car ...

100% modulation index on a 423.75 kHz subcarrier. The data rate can be: * Low 6.62 kbit/s (fc/2048) * High 26.48 kbit/s (fc/512) A logic 0 starts with eight pulses of 423.75 kHz followed by an unmodulated time of 18.88 μs (256/ fc); a logic 1 is the other way round. The

data frame A frame is a digital data transmission unit in computer networking and telecommunication. In packet switched systems, a frame is a simple container for a single network packet. In other telecommunications systems, a frame is a repeating structure s ...

delimiters are code violations, a start of frame is: # an unmodulated time of 56.64 μs (768/ fc), # 24 pulses of 423.75 kHz # a logic 1 and the end of a frame is: # a logic 0 # 24 pulses of 423.75 kHz # an unmodulated time of 56.64 μs The data are sent using a Manchester code.

Frequency-shift keying

Frequency-shift keying by switching between a 423.75 kHz sub carrier (operating frequency divided by 32) and a 484.25 kHz sub carrier (operating frequency divided by 28). The data rate can be: * Low 6.67 kbit/s (fc/2032) * High 26.69 kbit/s (fc/508) A logic 0 starts with eight pulses of 423.75 kHz followed by nine pulses of 484.28 kHz; a logic 1 is the other way round. The

delimiters are code violations, a start of frame is: # 27 pulses of 484.28 kHz # 24 pulses of 423.75 kHz # a logic 1 and the end of a frame is: # a logic 0 # 24 pulses of 423.75 kHz # 27 pulses of 484.28 kHz The data are sent using a Manchester code.

Manufacturer codes

see ISO/IEC 7816-6 #Code 0x01:

Motorola Motorola, Inc. () was an American multinational telecommunications company based in Schaumburg, Illinois, United States. After having lost $4.3 billion from 2007 to 2009, the company split into two independent public companies, Motorol ...

#Code 0x02:

ST Microelectronics STMicroelectronics N.V. commonly referred as ST or STMicro is a Dutch multinational corporation and technology company of French-Italian origin headquartered in Plan-les-Ouates near Geneva, Switzerland and listed on the French stock market. ST ...

#Code 0x03: Hitachi #Code 0x04: NXP Semiconductors #Code 0x05:

Infineon Technologies Infineon Technologies AG is a German semiconductor manufacturer founded in 1999, when the semiconductor operations of the former parent company Siemens AG were spun off. Infineon has about 50,280 employees and is one of the ten largest semicon ...

#Code 0x06: Cylinc #Code 0x07:

Texas Instruments Texas Instruments Incorporated (TI) is an American technology company headquartered in Dallas, Texas, that designs and manufactures semiconductors and various integrated circuits, which it sells to electronics designers and manufacturers globa ...

''Tag-it'' #Code 0x08:

Fujitsu Limited is a Japanese multinational information and communications technology equipment and services corporation, established in 1935 and headquartered in Tokyo. Fujitsu is the world's sixth-largest IT services provider by annual revenue, and the la ...

#Code 0x09: Matsushita Electric Industrial #Code 0x0A:

NEC is a Japanese multinational information technology and electronics corporation, headquartered in Minato, Tokyo. The company was known as the Nippon Electric Company, Limited, before rebranding in 1983 as NEC. It provides IT and network soluti ...

#Code 0x0B: Oki Electric #Code 0x0C:

Toshiba , commonly known as Toshiba and stylized as TOSHIBA, is a Japanese multinational conglomerate corporation headquartered in Minato, Tokyo, Japan. Its diversified products and services include power, industrial and social infrastructure systems, ...

#Code 0x0D: Mitsubishi Electric #Code 0x0E:

Samsung Electronics Samsung Electronics Co., Ltd. (, sometimes shortened to SEC and stylized as SΛMSUNG) is a South Korean multinational electronics corporation headquartered in Yeongtong-gu, Suwon, South Korea. It is the pinnacle of the Samsung chaebol, a ...

#Code 0x0F:

Hyundai Electronics SK hynix Inc. is a South Korean supplier of dynamic random-access memory (DRAM) chips and flash memory chips. Hynix is the world's second-largest memory chipmaker (after Samsung Electronics) and the world's third-largest semiconductor company. ...

#Code 0x10: LG Semiconductors #Code 0x12: WISeKey #Code 0x16: EM Microelectronic-Marin #Code 0x1F: Melexis #Code 0x2B:

Maxim Integrated Maxim Integrated, a subsidiary of Analog Devices, designs, manufactures, and sells analog and mixed-signal integrated circuits for the automotive, industrial, communications, consumer, and computing markets. Maxim's product portfolio includes p ...

#Code 0x33: AMIC #Code 0x39: Silicon Craft Technology #Code 0x44: GenTag, Inc (USA) #Code 0x45: Invengo Information Technology Co.Ltd

Implementations

The first byte of the UID should always be 0xE0.

Products with ISO/IEC 15693 interface

* EEPROM: various manufacturers like

or NXP offer EEPROMs readable via ISO/IEC 15693. * μController:

offers a small μController entirely powered by the ISO/IEC 15693 reading field and capable of reading a simple temperature sensor, wirelessly providing the value of that to the reader.

External links

ISO/IEC 15693-1:2010 Identification cards — Contactless integrated circuit cards — Vicinity cards — Part 1: Physical characteristics
*[https://www.iso.org/standard/43467.html ISO/IEC 15693-3:2009 Identification cards — Contactless integrated circuit cards — Vicinity cards — Part 3: Anticollision and transmission protocol] {{DEFAULTSORT:ISO IEC 15693 ISO/IEC standards, #15693