Mifare UltraLight Template

Description

Use the Mifare UltraLight Template to read data from a PICC within the NXP Mifare UltraLight family (including Mifare UltraLight EV1, Mifare UltraLight C, NTAG203, NTAG213, and virtually all other chips in the NTAG family).

Any PICC compliant with the NFC Forum Type 2 Tag specification may also be read using this template (but the Reader will not decode the NFC Forum NDEF data when this template is choosen).

The Reader may either

  • Read arbitrary data; the data will be transmitted in hexadecimal format. To do so, select the RAW mode in TOF register.

  • Read a number (decimal output). To do so, select the decimal mode in TOF register.

  • Read a string (ASCII-encoded data). To do so, select either the Short String or the Long String mode in TOF register.

The target data is pointed to by an absolute page number (yet the data may occupy more than one page). The page number is specified in the LOC register.

Registers

This Template uses 5 configuration registers:

Alias Offset Name Description
LKL 0 Lookup List Set to 62 to use this Template
LOC 3 Location of Data See details below
TOF 1 Output Size and Format See details below
OPT 4 Options Template-specific Options
PFX 2 Prefix Template-specific Prefix

LOC - Location of Data

Offset : 3

Size : 3

Byte 0 : Address

This is the Address of the 1st page to read.

Valid range depends on the memory size of the actual PICC

Byte 1 : Shift Bytes

Leading bytes to suppress; valid range is 0 to 48 (in decimal).

Byte 2 : Shift Bits

Leading bits to suppress; valid range is 0 to 7.

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 (62)
2 : Add Card Type Token as char (U)
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.