TDA8029HLSLASHC2 datasheet(30/58 Pages) PHILIPS

30 / 58 page

2003 Oct 30

Philips Semiconductors

Product speciﬁcation

Low power single card reader

TDA8029

8.10.1.4

Time-Out Conﬁguration register (TOC)

The time-out counter is very useful for processing the clock counting during ATR, the Work Waiting Time (WWT) or the

waiting times defined in protocol T = 1. It should be noted that the 200 and nmax clock counter (nmax = 384 for

TDA8029HL/C1 and nmax = 368 for TDA8029HL/C2) used during ATR is done by hardware when the start session is set.

Specific hardware controls the functionality of BGT in T = 1 and T = 0 protocols and a specific register is available for

processing the extra guard time.

Writing to register TOC is not allowed as long as the card is not activated with a running clock.

Before restarting the 16-bit counter (counters 3 and 2) by writing 61h, 65h, 71h, 75h, F1h or F5h in the TOC register, or

the 24-bit counter (counters 3, 2 and 1) by writing 68h or 7C in the TOC register, it is mandatory to stop them by writing

00h in the TOC register.

Detailed examples of how to use these specific timers can be found in application note

“AN01010”.

The time-out configuration register is used for setting different configurations of the time-out counter as given in Table 43,

all other configurations are undefined.

Table 42 Time-out conﬁguration register, address 8h, read and write

Table 43 Time-out counter conﬁgurations

BIT

543210

Symbol

TOC7

TOC6

TOC5

TOC4

TOC3

TOC2

TOC1

TOC0

Reset value

00000

TOC [7:0]

(HEX)

OPERATING MODE

All counters are stopped.

Counters 2 and 3 are stopped; counter 1 continues to operate in auto-reload mode.

Counter 1 is stopped, and counters 3 and 2 form a 16-bit counter. Counting the value stored in registers

TOR3 and TOR2 is started after 61h is written in register TOC. When the terminal count is reached, an

interrupt is given, and bit TO3 in register USR is set. The counter is stopped by writing 00h in register

TOC, and should be stopped before reloading new values in registers TOR2 and TOR3.

Counter 1 is an 8-bit auto-reload counter, and counters 3 and 2 form a 16-bit counter. Counter 1 starts

counting the content of register TOR1 on the ﬁrst start-bit (reception or transmission) detected on pin I/O

after 65h is written in register TOC. 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. It is

not allowed to change the content of register TOR1 during a count. Counters 3 and 2 are wired as a

single 16-bit counter and start counting the value in registers TOR3 and TOR2 when 65h is written in

stopped by writing 05h in register TOC before reloading new values in registers TOR2 and TOR3.

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 after 68h is written in register TOC. The counter is stopped by writing 00h in

Counter 1 is stopped, and counters 3 and 2 form a 16-bit counter. After writing this value, counting the

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

transmission) 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.

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