TDA8029HLSLASHC2 datasheet(41/58 Pages) PHILIPS

41 / 58 page

2003 Oct 30

Philips Semiconductors

Product speciﬁcation

Low power single card reader

TDA8029

8.10.3.6

Power Control Register (PCR)

This register is used for starting or stopping card sessions.

Table 66 Power control register, address 7h, read and write

Table 67 Description of register bits

BIT

543210

Symbol

−−

−

1V8

RSTIN

3V/5V

START

Reset value

−−

000000

BIT

SYMBOL

DESCRIPTION

7to4

−

Not used.

1V8

Select 1.8 V. If 1V8 = 1, then VCC = 1.8 V. It should be noted that specifications are not

guaranteed at this voltage when the supply voltage VDD is less than 3 V.

RSTIN

Card reset. When the card is activated, pin RST is the copy of the value written in

RSTIN.

3V/5V

Select 3 V or 5 V. If 3V/5V = 1, then VCC = 3 V. If 3V/5V = 0, then VCC =5V.

0START

Activate and deactivate card. If START = 1 is written by the controller, then the card is

activated (see description of activation sequence in Section 8.16). If the controller writes

START = 0, then the card is deactivated (see description of deactivation sequence in

Section 8.17). START is automatically reset in case of emergency deactivation.

For deactivating the card, only bit START should be reset.

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