Access NSM01 Installation Manual

NFC Smartcard Module

Hardware Installation Manual

NFC Smartcard Module

Installation Manual

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NFC Smartcard Module

Hardware Installation Manual

1. Introduction

This document describes the hardware of the NFC smartcard module (NSM). The readers of this document
would benefit if they have prior knowledge of the specifications mentioned in References section.

2. References

The readers of this document shall have knowledge on the following specifications

USB CCID rev1.1 : Specification for Integrated Circuit Cards Interface Devices

ISO/IEC 14443-2 : Radio frequency power and signal interface

ISO/IEC 14443-3 : Initialisation and anti-collision

ISO/IEC 14443-4 : Transmission protocol

Mifare contactless card (Classic 1K, Classic 4K and Ultralight) datasheets

ISO/IEC 7816-3 : Electronic signals and transmission protocols

ISO/IEC 7816-4 : Inter-Industry commands for interchange

NSM USB/Serial software reference manual

3. FCC Statement

This device complies with Part 15 of the FCC Rules. Operation is subject to the following two conditions:
(1) this device may not cause harmful interference, and
(2) this device must accept any interference received, including interference that may cause undesired
operation.

No changes shall be made to the equipment without the manufacturer’s permission as this may void the user’s
authority to operate the equipment

It is the responsibility of the product manufacturer to ensure compliance with FCC Part 15B with the NFC Smart
Module integrated into their product.

The host product using NSM module shall have the following text on a permanent label.

Contains FCC ID : ZERNSM01

The label should be on a visible location outside the enclosure of the product.

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NFC Smartcard Module

HOST

connector

Smartcard Add-on

Connector

NOTE: The host connector connects to a 30 way FFC cable from the host system. This connector
has the USB D+/- signals, Serial interface TX/RX signals and the Power and Ground. For more
information on this connector pinout see Host connector section. The user can configure which
interface the NSM shall use to communicate with the host. For more information on host
interface selection see Host Interface Selection section.

Hardware Installation Manual

4. Product pictures

4.1. Contactless NSM board – Top view

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NFC Smartcard Module

Antenna

connectors

Hardware Installation Manual

4.2. Contactless NSM board

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NFC Smartcard Module

NSM module

Antenna #0 Antenna #1

USB or Serial

Host

Hardware Installation Manual

4.3. Typical Hardware Setup

The following diagram and pictures shows a typical setup for NSM module.

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NFC Smartcard Module

Serial/

USB Host

NSM

Module

Antenna #0

Antenna #1

Hardware Installation Manual

The following pictures show a typical setup. Note that the antenna and the Serial/USB host shown in the
pictures are for illustration only. The actual size and shape of the user’s antenna and host system may vary.

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NOTE: The Antenna and the U.FL coax cables can be supplied by Access IS or the user can design
the antenna using the support provided by Access IS. U.FL cables are widely available from
electronics stores like RS/Farnell.

Hardware Installation Manual

5. Installation

5.1. Hardware Prerequisites

The following section shows the hardware required for the installation.

 Serial or USB host system where the NSM module will connect to.
 NFC module and 30 way host FFC cable

 Antenna and two U.FL coax cables – If two antennas are used then there will be two set of antenna boards

and four coax cables

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NFC module

Host system

Hardware Installation Manual

5.2. Hardware Installation Steps

The following details the installation steps with diagrams.

1, Turn OFF power for the host system before starting the installation

2, Connect the host system to the NFC module using the 30 way FCC cable as shown below. Please refer to Host

connector section for the connector location and its pinouts.

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Antenna #0

Antenna #1

NSM Module

NOTE : If single antenna operation is enabled, then firmware uses only Ant #1 – Port J8 and J9. Ant
#0, port J2 and J3 are disabled.

NOTE : Antenna coax cables are polarised. Connect the corresponding connectors with +ve
markings and ground (triangle) markings on the antenna and NSM module

NOTE : The cable ferrite is required to meet the FCC emissions requirement. The user should ensure
that the cable ferrite is fitted in accordance to the specifications outlined in this manual. Failure to
do so might void the FCC certification.

Hardware Installation Manual

3, Connect the antenna to the NFC module using the coax cables.

4, After the connections are done, select/verify the correct host interface selection on HOST_IFSEL_IO pins.
Please refer to Host Interface Selection for HOST_IFSEL_IO pin settings.

5, If the product using the NSM module has a host cable, then a ferrite is required to be attached to the host
cable. Please refer Cable Ferrite Specification for the characteristics of the required ferrite and the location of
the ferrite on the host cable.

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NFC Smartcard Module

Hardware Installation Manual

6, Power up the host system or connect the host adapter to the USB/Serial port. Now, the NFC module and the
smart card module should start working. If the host interface is USB, then NSM module shall start enumerating
as a HID device and a smartcard reader as shown below.

7, Application software can now communicate to NSM module through USB interface or through serial
communication (See Serial Communication Settings).

5.3. Software Setup

Depending on the host interface selected, please refer USB or Serial software reference manual.

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To Host

To Device

100 mm

Ferrite

Hardware Installation Manual

6. Cable Ferrite Specification

Each NSM module is shipped with a cable ferrite. This ferrite is required on the host cable (if any) to get the
emissions levels within the acceptable limits. The cable is passed through the ferrite without any loops. The
electrical specification of the ferrite is given below.

The recommended ferrite is from Wurth electronics, Part number – 74 271 111.

The ferrite should be located close to the device (using the NSM module) and it should be spaced 100mm from
the device. The position of the ferrite can be critical with regards to the attenuation of radiated emissions. The
following diagram shows a typical installation.

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HOST

connector

PIN #1

Pin #

Signal Type

Signal

Description

1

Ground

GND

Ground signal

2

3V3 CMOS input

HOST_IFSEL_IO2

Host interface selection input – sampled during reset

3

3V3 CMOS input

HOST_IFSEL_IO1

Host interface selection input – sampled during reset

4

3V3 CMOS input

HOST_IFSEL_IO0

Host interface selection input – sampled during reset

5

Ground

GND

Ground signal

6

3V3 CMOS input

CAN1_RX

CAN host receiver line – Not used

7

3V3 CMOS output

CAN1_TX

CAN host transmitter line – Not used

8

Ground

GND

Ground signal

9

Open collector
output/input

I2C0_SCL

External I2C interface – Not used
10

Open collector

I2C0_SDA

External I2C interface – Not used

Hardware Installation Manual

7. Hardware Connections and Pinouts

There are three connectors that provides interface to the NSM module. Each of these connectors are described
in detail on the following sections.

7.1. Host connector

The host connector provides interface to the NSM host. Further, it also has additional signals that are brought
out of the module for host mode selection and for future expansion. The following diagram shows the location
of the 30 way FFC host connector and the pin#1 location.

The following table shows the pinouts for the host connector.

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NFC Smartcard Module

output/input

11

Ground

GND

Ground signal

12

3V3 CMOS output

SPI0_CS1

External SPI interface slave select 1 – Not used

13

3V3 CMOS output

SPI0_CS0

External SPI interface slave select 0 – Not used

14

3V3 CMOS output

SPI0_SCK

External SPI interface clock – Not used

15

3V3 CMOS output

SPI0_MOSI

External SPI interface MOSI – Not used

16

3V3 CMOS input

SPI0_MISO

External SPI interface MISO – Not used

17

Power input

5V0

5V power input

18

USB data lines

USB D-

USB D- signal

19

USB data lines

USB D+

USB D+ signal

20

Power input

5V0

5V power input

21

3V3 CMOS output

DEBUG_UART_RTS_n

Debug UART RTS signal, active low

22

3V3 CMOS input

DEBUG_UART_CTS_n

Debug UART CTS signal, active low

23

3V3 CMOS input

DEBUG_UART_RX

Debug UART Receiver line

24

3V3 CMOS output

DEBUG_UART_TX

Debug UART Transmitter line

25

Power input

5V0

5V power input

26

3V3 CMOS output

HOST_UART_RTS_n

Serial host UART RTS signal, active low

27

3V3 CMOS input

HOST_UART_CTS_n

Serial host UART CTS signal, active low

28

3V3 CMOS input

HOST_UART_RX

Serial host UART Receiver line

29

3V3 CMOS output

HOST_UART_TX

Serial host UART Transmitter line

30

Power input

5V0

5V power input

HOST_IFSEL_IO2

Host adapter – J9

HOST_IFSEL_IO1

Host adapter – J8

HOST_IFSEL_IO0

Host adapter – J7

Operating mode

0 0 0

USB mode

0 0 1

Serial mode

0 1 0

USB mode

0 1 1

USB mode

1 0 0

USB mode

1 0 1

USB mode

1 1 0

Serial Bootloader mode –Used for firmware
update

1 1 1

USB Bootloader mode – Used for firmware
update

Hardware Installation Manual

7.2. Host Interface Selection

The NSM module will select the host interface depending on the HOST_IFSEL_IOx signal values during reset. The
following table shows the different modes of operation based on the HOST_IFSEL_IOx signal.

If host adapter board is used, then the “0” in the above table denotes jumper installed and “1” denotes jumper

removed.

Note that if any of the HOST_IFSEL_IO pins are left floating, then the module reads that pin as “1”.

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Parameter

Value

Baud Rate

115200

Data format

8 bits

Parity

None

Stop bits

1

Flow Control

RTS/CTS

Hardware Installation Manual

7.3. Serial Communication Settings

In serial mode, the module by default uses the following serial communication settings.

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Connector

Description

J2

Antenna #0 Positive end

J3

Antenna #0 Ground end

J8

Antenna #1 Positive end

J9

Antenna #1 Ground end

Hardware Installation Manual

7.4. NFC connectors

The NSM module can be configured to use dual antenna or single antenna. The antenna ports are shown in the
table below.

If one of the antennas is not available, then, the pair of ports for that antenna can be left unconnected. There is
no need for port termination.

If the module is configured for single antenna, then Antenna #0 is disabled. (Ports J2 and J3 are disabled). The
module uses Antenna #1 (Ports J8 and J9) for NFC communication.

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LC2

C1a

Phase angle @13.56 MHz = 0 degree,

+/- 10 degree

Antenna

loop

C1b

Hardware Installation Manual

7.5. NFC Antenna

The NFC antenna is a simple LC circuit tuned to 13.56MHz. The following diagram show the circuit of the
antenna

The Antenna is tuned to resonate at 13.56MHz with a phase angle tolerance of +/-10 degrees. The following
graph shows the impedance and phase for a typical antenna tuned to 13.56MHz.

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Parameter

Minimum

Typical

Maximum

Impedance @13.56MHz

800 Ohms

1500 Ohms

-

Phase @ 13.56MHz

-10 Degrees

0 Degrees

+10 Degrees

Antenna Coil inductance

700nH

1200nH

2000nH

Antenna Coil Q

15

25

35

Antenna Gain

0.6 (-2.21 dB)

0.7 (-1.54 dB)

0.8 (-0.96 dB)

Antenna maximum size

- - 11cm x 15cm

Hardware Installation Manual

The following table provides information on the maximum and minimum values for the NFC antenna
parameters.

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Revision

Description

0.0

Initial version

0.1

Antenna tuning and dimensions added

0.2

Installation section added

0.2.0

NFC only version

0.2.1

Pictures updated
UL review comments incorporated

0.2.2

Changed wording on Cable Ferrite specification

0.2.3

Cable ferrite added into installation and its location shown

Hardware Installation Manual

8. Revision

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