Commission Implementing Regulation (EU) 2016/799 of 18 March 2016 implementing Regulation (EU) No 165/2014 of the European Parliament and of the Council laying down the requirements for the construction, testing, installation, operation and repair of tachographs and their components (Text with EEA relevance) (c. 799)

ANNEX I C U.K. Requirements for construction, testing, installation, and inspection

Appendix 2

TACHOGRAPH CARDS SPECIFICATION U.K.

3. HARDWARE AND COMMUNICATION U.K.

3.2. Transmission Protocol U.K.

TCS_10 The Transmission protocol shall be compliant with ISO/IEC 7816-3 for T = 0 and T = 1. In particular, the VU shall recognise waiting time extensions sent by the card. U.K.

3.2.1 Protocols U.K.

TCS_11 The card shall provide both protocol T=0 and protocol T=1. In addition the card may support further contact-oriented protocols. U.K.

TCS_12 T=0 is the default protocol, a PTS command is therefore necessary to change the protocol to T=1. U.K.

TCS_13 Devices shall support direct convention in both protocols: the direct convention is hence mandatory for the card. U.K.

TCS_14 The Information Field Size Card byte shall be presented at the ATR in character TA3. This value shall be at least ‘F0h’ (=240 bytes). U.K.

The following restrictions apply to the protocols:

TCS_15 T=0 U.K.

• The interface device shall support an answer on I/O after the rising edge of the signal on RST from 400 cc.

• The interface device shall be able to read characters separated with 12 etu.

• The interface device shall read an erroneous character and its repetition if separated with 13 etu. If an erroneous character is detected, the Error signal on I/O can occur between 1 etu and 2 etu. The device shall support a 1 etu delay.

• The interface device shall accept a 33 bytes ATR (TS+32)

• If TC1 is present in the ATR, the Extra Guard Time shall be present for characters sent by the interface device although characters sent by the card can still be separated with 12 etu. This is also true for the ACK character sent by the card after a P3 character emitted by the interface device.

• The interface device shall take into account a NUL character emitted by the card.

• The interface device shall accept the complementary mode for ACK.

• The get-response command cannot be used in chaining mode to get a data which length could exceed 255 bytes.

TCS_16 T=1 U.K.

• NAD byte: not used (NAD shall be set to ‘00’).

• S-block ABORT: not used.

• S-block VPP state error: not used.

• The total chaining length for a data field will not exceed 255 bytes (to be ensured by the IFD).

• The Information Field Size Device (IFSD) shall be indicated by the IFD immediately after the ATR: the IFD shall transmit the S-Block IFS request after the ATR and the card shall send back S-Block IFS. The recommended value for IFSD is 254 bytes.

• The card will not ask for an IFS readjustment.

3.2.2 ATR U.K.

TCS_17 The device checks ATR bytes, according to ISO/IEC 7816-3. No verification shall be done on ATR Historical Characters. U.K.

Example of Basic Biprotocol ATR according to ISO/IEC 7816-3

Character	Value	Remarks
TS	‘3Bh’	Indicates direct convention.
T0	‘85h’	TD1 present; 5 historical bytes are presents.
TD1	‘80h’	TD2 present; T=0 to be used
TD2	‘11h’	TA3 present; T=1 to be used
TA3	‘XXh’ (at least ‘F0h’)	Information Field Size Card ( IFSC)
TH1 to TH5	‘XXh’	Historical characters
TCK	‘XXh’	Check Character (exclusive OR)

TCS_18 After the Answer To Reset (ATR), the Master File (MF) is implicitly selected and becomes the Current Directory. U.K.

3.2.3 PTS U.K.

TCS_19 The default Protocol is T=0. To set the T=1 protocol, a PTS (also known as PPS) must be sent to the card by the device. U.K.

TCS_20 As both T=0 and T=1 protocols are mandatory for the card, the basic PTS for protocol switching is mandatory for the card. U.K.

The PTS can be used, as indicated in ISO/IEC 7816-3, to switch to higher baud rates than the default one proposed by the card in the ATR if any (TA(1) byte).

Higher baud rates are optional for the card.

TCS_21 If no other baud rate than the default one are supported (or if the selected baud rate is not supported), the card shall respond to the PTS correctly according to ISO/IEC 7816-3 by omitting the PPS1 byte. U.K.

Examples of basic PTS for protocol selection are the following:

Character	Value	Remarks
PPSS	‘FFh’	The Initiate Character.
PPS0	‘00h’ or ‘01h’	PPS1 to PPS3 are not present; ‘00h’ to select T0, ‘01h’ to select T1.
PK	‘XXh’	Check Character : ‘XXh’ = ‘FFh’ if PPS0 = ‘00h’, ‘XXh’ = ‘FEh’ if PPS0 = ‘01h’.