SLE 4432

SLE 4442

SLE 4440

SLE 4441

Semiconductor Group

9

Data Sheet Extension 09.98

2.2.

Extended Coding Scheme

Due to the available memory space the coding principle according to ISO/IEC 7816-4 applies for

SLE 4432, SLE 4442, SLE 4440 and SLE 4441. Data are coded according to the ASN 1 data

objects basic encoding rules using the structure Tag - Length - Value (BER TLV).

AID

ATR

DIR

H1,H2

H3,H4

Application identifier

Answer-to-Reset

Directory

ATR protocol bytes

ATR historical bytes

LA

LD

PIX

RID

TA

TD

Length of AID

Length of application data area

Proprietary appl. identifier extension

Registered appl. provider identifier

Tag of AID = ´4F´

Tag of application data area

APPLICATION data

H4

H3

H2

H1

TA LA

AID

ATR header

ATR data

DIR data

LA

RID

PIX

. . .

. . .

TD LD

LD

ICT

ICM

LM

TM

LM

Figure 5

Structure of a Mono- Application Memory IC Card with a simple DIR-Structure

Two coding principles apply

• Extended Coding Scheme (Compressed)

H1 H2 H3 H4 TM LM ICM ICT TA LA

RID

PIX

• Extended Coding Scheme (according to German Health Insurance)

H1 H2 H3 H4 TM LM ICM ICT … TT LT TA LA

RID

PIX

The byte definition is explained in the following:

ATR header

Byte H1:

Protocol type = ‘A2’ indicating two-wire link protocol

Byte H2:

Protocol parameter

Byte H3:

Historical byte “Category Indicator” = ‘10’ indicating that the following byte H4 will be a

DIR data reference

Byte H4:

Historical byte “DIR data reference” = a pointer (byte address) to the first byte of the

directory section (i.e. TA for Extended Coding Scheme - Compressed or TT for

Extended Coding Scheme - according to German Health Insurance)