Philips tda8005a DATASHEETS

INTEGRATED CIRCUITS

DATA SH EET

TDA8005A

Low-power (3 V/5 V) smart card coupler

Preliminary speciﬁcation File under Integrated Circuits, IC17

1998 Mar 20

Philips Semiconductors Preliminary speciﬁcation

Low-power (3 V/5 V) smart card coupler TDA8005A

FEATURES

• Smart card supply (5 and 3 V ±5%, 20 mA maximum with controlled rise and fall times)

• Smart card clock generation (up to 8 MHz), with two times synchronous frequency doubling

• Clock STOP HIGH, clock STOP LOW or 1.25 MHz (from internal oscillator) for cards power-down mode

• Specific UART on I/O for automatic direct/inverse convention settings and error management at character level

• Automatic activation and deactivation sequences through an independent sequencer

• Supports the protocol T = 0 in accordance with ISO 7816 GSM11.11 requirements (Global System for Mobile communication); approved for Final GSM11.11 Test Approval (FTA)

• Several analog options are available for different applications: doubler or tripler DC-to-DC converter, card presence, active HIGH or LOW, threshold voltage supervisor, etc.

• Overloads and take-off protections

• Current limitations in the event of short-circuit

• Special circuitry for killing spikes during power-on or off

• Supply supervisor

• Step-up converter (supply voltage from 2.5 to 6 V)

• Power-down and sleep mode for low power

consumption

• Enhanced ElectroStatic Discharge (ESD) protections on card side (6 kV minimum)

• Control and communication through a standard RS232 full-duplex interface

• Optional additional I/O ports for: – keyboard – LEDs – display – etc.

• P80CL51 microcontroller core with 4-kbyte ROM and 256-byte RAM.

APPLICATIONS

• Portable smart card readers for protocol T = 0

• GSM mobile phones.

GENERAL DESCRIPTION

The TDA8005A is a low-cost card interface for portable smart card readers. Controlled through a standard serial interface, it takes care of all ISO 7816 and GSM11.11 requirements for both 5 and 3 V cards. It gives the card and the set a very high level of security, due to its special hardware against ESD, short-circuiting, power failure, etc. Its integrated step-up converter allows operation within a supply voltage range of 2.5 to 6 V.

The very low power consumption in power-down and sleep modes saves battery power.

Development tools, application report and support (hardware and software) are available.

ORDERING INFORMATION

TYPE

NUMBER

TDA8005AG LQFP64 plastic low proﬁle quad ﬂat package; 64 leads; body 10 × 10 × 1.4 mm SOT314-2 TDA8005AH QFP44 plastic quad ﬂat package; 44 leads (lead length 1.3 mm);

1998 Mar 20 2

NAME DESCRIPTION VERSION

body 10 × 10 × 1.75 mm

PACKAGE

SOT307-2

Philips Semiconductors Preliminary speciﬁcation

Low-power (3 V/5 V) smart card coupler TDA8005A

QUICK REFERENCE DATA

SYMBOL PARAMETER CONDITIONS MIN. TYP. MAX. UNIT

DD(pd)

DD(sm)

DD(om)

SR slew rate on V

act

XTAL

amb

supply voltage doubler and tripler option 2.5 − 6.0 V supply current in power-down mode VDD= 5 V; card inactive − 100 −µA supply current in sleep mode card powered but clock

stopped; no load

doubler option − 500 −µA tripler option − 700 −µA

supply current in operating mode unloaded; f

= 6.5 MHz; f

µC

XTAL

= 13 MHz;

= 3.25 MHz

card

− 5.5 − mA

card supply voltage 5 V card

no load 4.85 5.05 5.25 V static load 4.75 5.0 5.25 V dynamic load on 200 nF

4.5 − 5.4 V

capacitor

3 V card

no load 2.9 3.03 3.15 V static load 2.79 3 3.21 V dynamic load on 200 nF

2.75 − 3.25 V

capacitor

card supply current operating −−20 mA

limitation −−note 1 mA

(rise and fall) maximum load capacitor

0.04 0.1 0.16 V/µs 250 nF (including typical 200 nF decoupling)

deactivation sequence duration −−225 µs activation sequence duration −−150 µs crystal frequency 2 − 16 MHz operating ambient temperature −25 − +85 °C

Note

1. See Table 3 for mask options.

1998 Mar 20 3

Philips Semiconductors Preliminary speciﬁcation

Low-power (3 V/5 V) smart card coupler TDA8005A

BLOCK DIAGRAM

handbook, full pagewidth

DDA

2.5 to 6 V 100 nF

ALARM

DELAY

RESET

RxD

TxD AUX1 AUX2

INT1

P00

P37

63 (43)

46 (31)

22 (17)

DDD

100 nF

10 (7)

SUPPLY

INTERNAL

REFERENCE

VOLTAGE SENSE

2.3 to 2.7 V

alarm

ref

TDA8005AG

47 nF

S1 S2

64 (44) 61 (41) 3 (2) 62 (42)

STEP-UP CONVERTER

INTERNAL OSCILLATOR

2.5 MHz

DDD

47 nF

S3 S4

osc ref

60 (40)

47 nF

(TDA8005AH)

DDD

28 (18) 29 (19) 32 (22) 33 (23) 30 (20)

(1)

CONTROLLER

CL51

4 kbytes ROM

256-byte RAM

OPTIONAL

PORTS

data clk EN S0 S1 R/W

skill

start

RST

off

SEQUENCER

INT

SECURITY

EN1

EN2

EN3

GENERATOR

RST

BUFFER

I/O

BUFFER

59 (39)

58 (38)

56 (36)

55 (35)

LIS

100 nF

RST

I/O

PERIPHERAL

INTERFACE

micro-

controller

clock

XTAL1 XTAL2

Pin numbers in parenthesis represent the TDA8005AH. (1) For details see Chapter “Pinning” and Table 3.

ISO 7816 UART

CLOCK CIRCUITRY

osc

36 (26) 35 (25) 37 (27) 2 (1) 53

DGND AGND

Fig.1 Block diagram.

1998 Mar 20 4

I/O

EN4

CLOCK

BUFFER

OUTPUT PORT

EXTENSION

52 51 50 49

K0 K1 K2 K3 K4 K5

57 (37)

47 (32)

MGL330

CLK

PRES

Philips Semiconductors Preliminary speciﬁcation

Low-power (3 V/5 V) smart card coupler TDA8005A

PINNING

SYMBOL

n.c. 1 − not connected AGND 2 1 analog ground S3 3 2 contact 3 for the step-up converter K5 4 − output port from port extension P03 5 3 general purpose I/O port (connected to port P03) P02 6 4 general purpose I/O port (connected to port P02) P01 7 5 general purpose I/O port (connected to port P01) n.c. 8 − not connected P00 9 6 general purpose I/O port (connected to port P00) V

DDD

n.c. 11 − not connected TEST1 12 8 test pin 1 (connected to port P10; must be left open-circuit in the application) P11 13 9 general purpose I/O port or interrupt (connected to port P11) P12 14 10 general purpose I/O port or interrupt (connected to port P12) P13 15 11 general purpose I/O port or interrupt (connected to port P13) P14 16 12 general purpose I/O port or interrupt (connected to port P14) n.c. 17 − not connected P15 18 13 general purpose I/O port or interrupt (connected to port P15) P16 19 14 general purpose I/O port or interrupt (connected to port P16) TEST2 20 15 test pin 2 (connected to PSEN; must be left open-circuit in the application) P17 21 16 general purpose I/O port or interrupt (connected to port P17) RESET 22 17 input for resetting the microcontroller (active HIGH) n.c. 23 − not connected n.c. 24 − not connected n.c. 25 − not connected n.c. 26 − not connected n.c. 27 − not connected RxD 28 18 serial interface receive line TxD 29 19 serial interface transmit line INT1 30 20 general purpose I/O port or interrupt (connected to port P33) T0 31 21 general purpose I/O port (connected to port P34) AUX1 32 22 push-pull auxiliary output (±5 mA; connected to timer T1 e.g. port P35) AUX2 33 23 push-pull auxiliary output (±5 mA; connected to timer; port P36) P37 34 24 general purpose I/O port (connected to port P37) XTAL2 35 25 crystal connection XTAL1 36 26 crystal connection or external clock input DGND 37 27 digital ground n.c. 38 − not connected

LQFP64 QFP44

DESCRIPTION

10 7 digital supply voltage

1998 Mar 20 5

Philips Semiconductors Preliminary speciﬁcation

Low-power (3 V/5 V) smart card coupler TDA8005A

SYMBOL

n.c. 39 − not connected P20 40 28 general purpose I/O port (connected to port P20) P21 41 − general purpose I/O port (connected to port P21) P22 42 29 general purpose I/O port (connected to port P22) P23 43 30 general purpose I/O port (connected to port P23) ALARM 44 − open-drain output for power-on reset (active HIGH or LOW by mask option) n.c. 45 − not connected DELAY 46 31 external capacitor connection for delayed reset signal PRES 47 32 card presence contact input (active HIGH or LOW by mask option) TEST3 48 33 test pin 3 (must be left open-circuit in the application) K4 49 − output port from port extension K3 50 − output port from port extension K2 51 − output port from port extension K1 52 − output port from port extension K0 53 − output port from port extension TEST4 54 34 test pin 4 (must be left open-circuit in the application) I/O 55 35 data line to/from the card (ISO C7 contact) RST 56 36 card reset output (ISO C2 contact) CLK 57 37 clock output to the card (ISO C3 contact) V

LIS 59 39 supply for low-impedance on cards contacts S5 60 40 contact 5 for the step-up converter S2 61 41 contact 2 for the step-up converter S4 62 42 contact 4 for the step-up converter V

DDA

S1 64 44 contact 1 for the step-up converter

LQFP64 QFP44

DESCRIPTION

58 38 card supply output voltage (ISO C1 contact)

63 43 analog supply voltage

1998 Mar 20 6

Philips Semiconductors Preliminary speciﬁcation

Low-power (3 V/5 V) smart card coupler TDA8005A

handbook, full pagewidth

n.c.

AGND

K5 P03 P02 P01

n.c.

P00

DDD

n.c.

TEST1

P11 P12 P13 P14

DDA

VS1S4

63 1 2 3 4 5 6 7 8

S5.

LIS 59

CLK

RST

I/O

TEST4K0K1 54

TEST3

48 47

PRES

DELAY

n.c. ALARM

44 43

P23

P22

P21

TDA8005AG

P20

10 11 12 13 14 15 16

40 39

n.c.

DGND

XTAL1

XTAL2

P37

AUX2

17 n.c.

P15

P16

TEST2

P17

RESET

23 n.c.

Fig.2 Pin configuration (LQFP64).

1998 Mar 20 7

24 n.c.

25 n.c.

n.c.

27 n.c.

RxD

TxD

INT1

31 T0

AUX1

MGL331

Philips Semiconductors Preliminary speciﬁcation

Low-power (3 V/5 V) smart card coupler TDA8005A

handbook, full pagewidth

AGND

S3 P03 P02 P01 P00

DDD

TEST1

P11 P12 P13

DDA

1 2 3 4 5

P16

TDA8005AH

P17

TEST2

6 7 8

9 10 11

P14

P15

LIS

RESET

RxD

CLK

TxD

RST

INT1

I/O

21 T0

TEST4

AUX1

33 32 31 30 29 28 27 26 25 24 23

MGL332

TEST3 PRES DELAY P23 P22 P20 DGND XTAL1 XTAL2 P37 AUX2

Fig.3 Pin configuration (QFP44).

1998 Mar 20 8

Philips Semiconductors Preliminary speciﬁcation

Low-power (3 V/5 V) smart card coupler TDA8005A

FUNCTIONAL DESCRIPTION Microcontroller

The microcontroller is a P80CL51 with 256 bytes of RAM instead of 128. The baud rate of the UART has been multiplied by four in modes 1, 2 and 3. This means that the division factor of 32 in the formula is replaced by 8 in both reception and transmission mode and that in the reception modes only four samples per bit are taken with decision on the majority of samples 2, 3 and 4; the delay counter has been reduced from 1536 to 24 as well.

Remark: this has an impact when getting out of power-down mode. It is recommended to switch to internal clock before entering power-down mode.

All the other functions remain unchanged. Refer to the P80CL51 data sheet for any further information. Internal ports INT0 (P32), P10, P04 to P07 and P24 to P27 are used for controlling the smart card interface.

Mode 0 is unchanged. The baud rate for modes 1 and 3 is:

SMOD

---------------- 8

---------------------------------------------- 12 256 TH1–()×

clk

The baud rate for mode 2 is:

SMOD

---------------- 16

clk

For mode 3 timing see Table 1.

Supply

The circuit operates within a supply voltage range of

2.5 to 6 V. The supply pins are V AGND. Pins V

and AGND supply the analog drivers to

DDA

DDD

, V

DDA

, DGND and

the card and have to be externally decoupled because of the large current spikes that the card and the step-up converter can create. An integrated spike killer ensures the contacts to the card remain inactive during power-up or power-down. An internal voltage reference is generated which is used within the step-up converter, the voltage supervisor and the V

generator.

The voltage supervisor generates an internal alarm pulse, whose length is defined by an external capacitor tied to the DELAY pin, when V

is too low to ensure proper

DDD

operation (1 ms per 1 nF typical). This pulse is used as a reset pulse by the controller, in parallel with an external reset input, which can be tied to the system controller.

It is also used in order to either block any spurious card contacts during controllers reset, or to force an automatic deactivation of the contacts in the event of supply dropout; see Sections “Activation sequence” and “Deactivation sequence”.

In the 64 pin version, this reset pulse is output to the open drain ALARM pin, which may be selected active HIGH or active LOW by mask option and may be used as a reset pulse for other devices within the application.

Table 1 Mode 3 timing

BAUD

= 6.5 MHz;

clk

VDD=5V

= 3.25 MHz;

clk

VDD=5or3V

RATE

SMOD TH1 SMOD TH1

135416 1 255 −− 67708 0 255 1 255 45139 1 253 −− 33854 0 254 0 255 27083 1 251 −− 22569 0 253 1 253 16927 −−0 254 13542 −−1 251 11285 0 250 0 253

1998 Mar 20 9

Philips Semiconductors Preliminary speciﬁcation

Low-power (3 V/5 V) smart card coupler TDA8005A

handbook, full pagewidth

th(VDD)

+ V

hys(VthVDD)

th(DELAY)

th(VDD)

DELAY

ALARM

Fig.4 Supply supervisor.

Low impedance supply (pin LIS)

For some applications, it is mandatory that the contacts to the card (VCC, RST, CLK and I/O) are low impedance while the card is inactive and also when the coupler is not powered. An auxiliary supply voltage on pin LIS ensures this condition where I

≤ 5 µA for V

LIS

= 5 V. This low

LIS

impedance situation is disabled when VCC starts rising during activation, and re-enabled when the step-up converter is stopped during deactivation. If this feature is not required, the LIS pin must be tied to V

DDD

Step-up converter

Except for the V buffers, the whole circuit is powered by V

generator and the other cards contacts

and V

DDD

DDA

. If the supply voltage is 3 or 5 V, then a higher voltage is needed for the ISO contacts supply. When a card session is requested by the controller, the sequencer first starts the step-up converter, which is a switched capacitors type, clocked by an internal oscillator at a frequency of approximately 2.5 MHz. The output voltage V regulated at approximately 6.5 V and then fed to the V

step-up

generator. VCC and DGND are used as a reference for all other cards contacts.

MGL333

The step-up converter may be chosen as a doubler or a tripler by mask option, depending on the voltage and the current needed on the card.

ISO 7816 security

The correct sequence during activation and deactivation of the card is ensured through a specific sequencer, clocked by a division ratio of the internal oscillator.

Activation (START signal P05; see Table 3) is only possible if the card is present (PRES HIGH or LOW according to mask option), and if the supply voltage is correct (ALARM signal inactive); CLK and RST are controlled by RSTIN (internal signal; port P04), allowing the correct count of CLK pulses during answer-to-reset from the card.

The presence of the card is signalled to the controller by the OFF signal (port P10; see Table 3).

During a session, the sequencer performs an automatic emergency deactivation in the event of card take-off, supply voltage drop, or hardware problems. The OFF signal falls thereby warning the controller.

1998 Mar 20 10

Philips Semiconductors Preliminary speciﬁcation

Low-power (3 V/5 V) smart card coupler TDA8005A

Clock circuitry

The clock to the microcontroller and the clock to the card are derived from the main clock signal (XTAL from 2 to 16 MHz, or an external clock signal).

Directly after reset and during power reduction modes the microcontroller clock frequency f

equals1⁄8f

clk

INT

; f

INT

always present because it is derived from the internal oscillator and gives the lowest power consumption. When required (for card session, serial communication or anything else) the microcontroller may choose to clock itself with

XTAL

,1⁄4f

XTAL

or1⁄2f

. All frequency changes

INT

⁄2f

are synchronous, thereby ensuring no hang-up due to short spikes etc.

Cards clock: the microcontroller may select to send the card a card clock frequency of1⁄2f

⁄2f

(≈1.25 MHz), or to stop the clock HIGH or LOW.

INT

XTAL

,1⁄4f

XTAL

,1⁄8f

XTAL

All transitions are synchronous, ensuring correct pulse length during start or change in accordance with ISO 7816.

After power on, CLK is set at STOP LOW and f

⁄8f

INT

is set at

clk

Power-down and sleep modes

The TDA8005A offers a large flexibility for defining power reduction modes by software. Some configurations are described below.

In the power-down mode, the microcontroller is in power-down and the supply and the internal oscillator are

active. The card is not active; this is the smallest power consumption mode. Any change on P1 ports or on PRES will wake-up the circuit (for example, a key pressed on the keyboard, the card inserted or taken off).

In the sleep mode, the card is powered but configured in the idle or sleep mode. The step-up converter will only be active when it is necessary to reactivate V

step-up

. When the microcontroller is in power-down mode any change on P1 ports or on PRES will wake up the circuit.

In both power reduction modes the sequencer is active, allowing automatic emergency deactivation in the event of card take-off, hardware problems, or supply dropout.

The TDA8005A is set into power-down or sleep mode by software. There are several ways to return to normal mode: insertion or extraction of the card, detection of a change on P1 (which can be a key pressed) or a command from the system microcontroller. For example, if the system monitors the clock signal on XTAL1, it may stop this clock after setting the device into power-down mode and then wake it up when sending the clock signal again. In this situation, the internal clock should have been used before the f

clk

Peripheral interface

This block allows synchronous serial communication with the three peripherals (ISO 7816 UART, clock circuitry and output port extension); see Figs 1 and 5.

handbook, full pagewidth

RESET

CC0 CC1 CC2 CC3 CC4 CC5 CC6 CC7

UC0

UT0

PE0

P24

DATA

clock configuration

UART configuration

UC1 UC2 UC3 UC4 UC5 UC6 UC7

UART transmit

UT1 UT2 UT3 UT4 UT5 UT6 UT7

ports extension

PE1 PE2 PE3 PE4 PE5 PE6 PE7

P06

STROBE

P07

ENABLE

PERIPHERAL CONTROL

P27

REG0

Fig.5 Peripheral interface diagram.

1998 Mar 20 11

P26

REG1

P25

R/W

UR1 UR2 UR3 UR4 UR5 UR6 UR7

UR0

US1 US2 US3 US4 US5 US6 US7

US0

P32 INT

UART receive

UART status register

MGL334

+ 25 hidden pages