2000 Apr 20

7

Philips Semiconductors

Product specification

TDA8003TS

Table 2

Description of the command bits; (all bits are cleared at reset)

Table 3

Clock to the card at power-down

Table 4

Description of the status bits; note 1

Note

1. In case of card extraction, supply drop-out or overload detection within a session, the card will be automatically

deactivated, SIMERR pulled LOW, bit START = 0 and the corresponding status bit = 1. The status bit will be logic 0

and SIMERR will be released when the microcontroller reads out the status register, on the 7th SCL pulse. After a

supply drop-out, SIMERR will be released at the end of the alarm pulse and bit SUPL = 1.

SYMBOL

BIT

DESCRIPTION

START/STOP

0

Logic 1 initiates an activation sequence and a cold reset procedure. Logic 0 initiates a

deactivation sequence.

WARM

1

Logic 1 initiates a warm reset procedure. TDA8003TS/C1: warm reset performed only

when the 2 times 45000 CLK pulses have expired without answer from the card.

TDA8003TS/C2: warm reset performed whatever the card has answered or not at the

cold reset procedure but the count is 2 times 44745 CLK pulses.

3 V/5 VN

2

PDOWN

3

Logic 1 applies on CLK the frequency defined by bits CLKPD1 and CLKPD2, and

enters a reduced consumption mode. Logic 0 sets the circuit back to normal mode.

CLKPD1

4

Bits 4 and 5 determine the clock to the card at power-down as shown in Table 3.

CLKPD2

5

DT/DFN

6

I/OEN

7

Logic 1 will transfer I/O to SIMI/O. Logic 0 sets I/O and SIMI/O to high-impedance.

BIT 4

BIT 5

FUNCTION

0

0

clock stop LOW

0

1

clock stop HIGH

1

0

1

1

no change

SYMBOL

BIT

DESCRIPTION

PRES

0

Logic 1 when the card is present. Logic 0 when the card is not present.

PRESL

1

Logic 1 when the card has been extracted or inserted. Logic 0 when the status is

read-out.

−

2

Bit 2 is not used and is fixed to logic 0.

SUPL

3

Logic 1 when the voltage supervisor has signalled a fault. Logic 0 when the status is

read-out.

PROT

4

Logic 1 when an overload has occurred during a session. Logic 0 when the status is

read-out.

MUTE

5

TDA8003TS/C1: Logic 1 when a card has not answered after 2 times 45000 CLK

pulses. Logic 0 when the status is read-out.

TDA8003TS/C2: Same as for C1, but the count is 2 times 44745 CLK pulses.

EARLY

6

Logic 1 when a card has answered between 200 and 352 CLK cycles. Logic 0 when

the status is read-out.

ACTIVE

7

Logic 1 when the card is power-on. Logic 0 when the card is power-off.