TDA8029HLSLASHC2 datasheet(31/58 Pages) PHILIPS

31 / 58 page

2003 Oct 30

Philips Semiconductors

Product speciﬁcation

Low power single card reader

TDA8029

8.10.2

ISO UART REGISTERS

8.10.2.1

UART Transmit Register (UTR)

Table 44 UART transmit register, address Dh, write

Table 45 Description of register bits

Counter 1 is an 8-bit auto-reload counter, and counters 3 and 2 form a 16-bit counter. After 75h is written

in register TOC, counter 1 starts counting the content of register TOR1 on the ﬁrst start-bit (reception or

transmission) detected on pin I/O. When counter 1 reaches its terminal count, an interrupt is given, bit

TO1 in register USR is set and the counter automatically restarts the same count until it is stopped.

Changing the content of register TOR1 during a count is not allowed. Counting the value stored in

registers TOR3 and TOR2 is started on the ﬁrst start-bit detected on pin I/O (reception or transmission)

after 75h is written, and then on each subsequent start-bit. It is possible to change the content of

registers TOR3 and TOR2 during a count, the current count will not be affected and the new count value

will be taken into account at the next start-bit. The counter is stopped by writing 00h in register TOC. In

this conﬁguration, registers TOR3, TOR2 and TOR1 must not be all zero.

Counters 3, 2 and 1 are wired as a single 24-bit counter. Counting the value stored in registers TOR3,

TOR2 and TOR1 is started on the ﬁrst start-bit detected on pin I/O (reception or transmission) after the

value has been written, and then on each subsequent start-bit. It is possible to change the content of

registers TOR3, TOR2 and TOR1 during a count. The current count will not be affected and the new

count value will be taken into account at the next start-bit. The counter is stopped by writing 00h in

Same as value 05h, except that all the counters will be stopped at the end of the 12th ETU following the

ﬁrst received start-bit detected after 85h has been written in register TOC.

Same conﬁguration as value 65h, except that counter 1 will be stopped at the end of the 12th ETU

following the ﬁrst start-bit detected after E5h has been written in register TOC.

Same conﬁguration as value 71h, except that the 16-bit counter will be stopped at the end of the 12th

ETU following the ﬁrst start-bit detected after F1h has been written in register TOC.

Same conﬁguration as value 75h, except the two counters will be stopped at the end of the 12th ETU

following the ﬁrst start-bit detected after F5h has been written in register TOC.

BIT

543210

Symbol

UT7

UT6

UT5

UT4

UT3

UT2

UT1

UT0

Reset value

00000

BIT

SYMBOL

DESCRIPTION

7 to 0

UT[7:0]

UART transmit bits. When the microcontroller wants to transmit a character to the card,

it writes the data in direct convention in this register. The transmission:

• Starts at the end of writing (on the rising edge of signal WR) if the previous character

has been transmitted and if the extra guard time has expired

• Starts at the end of the extra guard time if this one has not expired

• Does not start if the transmission of the previous character is not completed

• With a synchronous card (bit SAN within register UCR2 is set), only UT0 is relevant and

is copied on pin I/O of the card.

TOC [7:0]

(HEX)

OPERATING MODE

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