#Google SmartTap Template

Optional, restricted functionality - Confidential information

This functionality is available only for customers who have signed a specific license agreement, and its documentation can be provided only to customers who are under NDA with SpringCard and/or with the owner of the technology.

Please contact SpringCard Sales Team for detailed information and pricing options.

#Description

Read data from an Android mobile phone using the Google SmartTap protocol.

#Remark

When configuring the Google SmartTap template in the Smart Reader, always activate both NFC-A and NFC-B protocol, and activate EMV compliance in the “NFC/RFID HF compliance in poller mode” configuration register.

The SpringCore firmware is only suitable to read Google SmartTap data, not to run Google Pay transactions. SpringCore devices are not payment terminals.

#Registers

This Template uses 7 configuration registers:

Alias	Offset	Name	Description
LKL	0	Lookup List	Set to D2 to use this Template
COLLECTORID	3	Collector ID	Collector ID of merchant system.
KEYVERSION	4	Long Term Key Version	Version of the private key.
PRIVATEKEY	5	Long Term Private Key	See details below
TOF	1	Output Size and Format	See details below
OPT	4	Options	Template-specific Options
PFX	2	Prefix	Template-specific Prefix

#COLLECTORID - Collector ID

Offset : 3

Size : 4

#KEYVERSION - Long Term Key Version

Offset : 4

Size : 4

#PRIVATEKEY - Long Term Private Key

Offset : 5

Size : 32

#Byte 0 : Key slot in the internal ATECC

Condition : If the size of the register is 1, this Byte stores the ATECC key slot.

#Bytes 0-31 : Value of ECC Private Key

Condition : If the size of the register is 32, these Bytes store the actual private key.

#TOF - Output Size and Format

Offset : 1

Size : 2

#Byte 0 : RAW Mode

Condition : When RAW Mode is selected (Bit 6 in Byte 0 is 0)

Bit	Role	Values
7	Invert Data?	0 : Transmit the sequence of bytes as is 1 : Transmit the sequence of bytes in reverse order
6	Mode	0 : RAW Mode (Data is a numerical value) 1 : String Mode (Data is an ASCII string)
5	Padding if Data is shorted than specified length	0 : Padd with 0 on the left 1 : Padd with F on the right
4	Remove leading zeroes?	0 : Keep all digits 1 : Suppress 0 digits on the left of the Data
3-0	Length and Format	0 : Decimal, 10 digits (truncation on 4-B) 1 : Raw (hex), 4 bytes (32 bits) 2 : Raw (hex), 8 bytes (64 bits) 3 : Raw (hex), 5 bytes (40 bits) 4 : Raw (hex), 10 bytes (80 bits) 5 : Raw (hex), 7 bytes (56 bits) 6 : Raw (hex), 11 bytes (88 bits) 7 : RFU 8 : Raw (hex), 16 bytes (128 bits) 9 : Raw (hex), 20 bytes (160 bits) 10 : Raw (hex), 24 bytes (196 bits) 11 : Raw (hex), 32 bytes (256 bits) 12 : Decimal, 12 digits (truncation on 5-B) 13 : Decimal, 13 digits (truncation on 5-B) 14 : Decimal, variable length 15 : Raw (hex), variable length

#Byte 0 : String Mode

Condition : When String Mode is selected (Bit 6 in Byte 0 is 1)

Bit	Role	Values
7	Invert Data?	0 : Transmit the sequence of characters as is 1 : Transmit the sequence of characters in reverse order
6	Mode	0 : RAW Mode (Data is a numerical value) 1 : String Mode (Data is an ASCII string)
5	Padding if Data is shorted than specified length	0 : Variable length (no padding) 1 : Padd with (space characters) on the right until the specified length
4	Short string or Long string?	0 : Short string (truncate to 16 characters or less) 1 : Long string (more than 16 characters)
3-0	Length	0 : 16 characters 1 : 1 character 2 : 2 characters 3 : 3 characters 4 : 4 characters 5 : 5 characters 6 : 6 characters 7 : 7 characters 8 : 8 characters 9 : 9 characters 10 : 10 characters 11 : 11 characters 12 : 12 characters 13 : 13 characters 14 : 14 characters 15 : 15 characters

#Byte 1 : Options for Long String

Condition : When Long String Mode is selected (Bit 6 in Byte 0 is 1 and Bit 4 is 1)

Use this byte to specify the exact length to read from the card. Valid range is 1 to 255.

#OPT - Options

Offset : 4

Size : 1

If this register is set, the Reader adds a token to its output to tell the receiver what kind of credential has been read.

Bit	Role	Values
7-4	RFU
3-2	Position of the Card Type Token	0 : Before the Prefix 1 : After the Prefix, before the Data 2 : After the Data (before the Suffix) 3 : RFU
1-0	Add a Card Type Token to the output stream?	0 : Do not add a Card Type Token 1 : Add Card Type Token in hex (D2) 2 : Add Card Type Token as char (g) 3 : RFU

#PFX - Prefix

Offset : 2

Size : 8

A Template-specific Prefix, that is added after the Reader’s global Prefix.

Remark : Use \t for a Tab, \n for Enter, \b for Back space, \v for Vertical space.