User's Manual
Table Of Contents
- Legal information
- Introduction to the manual
- General information about SDI011
- SDI011 characteristics
- Software modules
- Commands description
- Generic APDU
- Set of APDU for contactless storage user tokens
- Set of APDU for ISO/IEC14443-4 user tokens
- Set of APDU defined by SCM Microsystems
- Escape commands for the contactless interface
- Sending escape commands to SDI011
- Escape command codes
- READER_GETCARDINFO
- READER_LED_CONTROL_BY_FW
- READER_LEDCONTROL
- READER_CNTLESS_GET_MFRC_REV
- READER_CNTLESS_GET_ATS_ATQB
- READER_CNTLESS_GET_TYPE
- READER_CNTLESS_SET_TYPE
- READER_CNTLESS_RF_SWITCH
- READER_CNTLESS_RAW_CFG
- READER_CNTLESS_RAW_XMIT_EX
- READER_ CNTLESS_DISABLE_PPS
- READER_SWITCH_RF_ON_OFF
- READER_CNTLESS_848KBPS
- READER_CNTLESS_BAUDRATE
- READER_CNTLESS_FORCE_BAUDRATE_PCSC_REV2
- Escape commands for the contact interface
- Annexes
SDI011 REFERENCE MANUAL 20
4. SDI011 characteristics
4.1. SDI011 high level architecture
4.1.1. Block diagram
The link between SDI011 and the host to which it is connected is the USB interface providing
both the power and the communication channel.
Device controller
STC2 ASIC (SCM) with
embedded flash
RF front-end
MFRC531 (NXP)
EMC filter +
Matching circuitry
LED
text
text
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Antenna
To host
ISO7816 contact
smart card interface
SDI011 has a device controller which is SCM‘s STCII ASIC. This ASIC has several interfaces
available. In SDI011 implementation 3 peripherals are connected to the device controller:
LED for reader status indication
A contact smart card interface
An RF front-end that handles the RF communication
The ASIC embeds flash memory. The flash is programmed during the manufacturing of SDI011
devices. This flash contains the firmware developed by SCM Microsystems to handle all the
ISO7816 contact protocol, the RF communication protocols and the PC/SC communication
protocol with the host. The flash can be upgraded once the device is deployed in the field,
hence enabling firmware upgrades to add and potentially patch features.
The RF front-end ensures the coding/decoding/framing modulation/demodulation required for
the RF communication. It is controlled by the device controller through registers.
The matching circuitry provides the transmission and receiver paths adaptation for the antenna
to function properly.