TDA8007B datasheet(13/36 Pages) PHILIPS

13 / 36 page

2000 Nov 09

Philips Semiconductors

Product speciﬁcation

Double multiprotocol IC card interface

TDA8007B

The time-out counter is very useful for processing the clock

counting during ATR, the Work Waiting Time, or the

waiting times defined in T = 1 protocol. It should be noted

that the 200 and 400 CLK counter used during ATR is

done by hardware when the start session is set; a specific

hardware controls functionality BGT in T = 1 protocol, and

a specific register is available for processing the extra

guard time.

The possible use of the counters is as follows:

• ATR (cold reset):

– Before activation; TOR1 = C0H, TOR2 = 6EH,

TOR3 = 0 and TOC = 65. Once activated, timer 2 + 3

will count 40920 clock pulses before giving an

interrupt.

– On interrupt; TOR2 = 76H and TOC = 65. If a

character is received from the card before the

timeout, then counter 1 will be enabled. Counter 1 will

give one interrupt every 192 ETUs, so the software

will count 100 times to verify that the ATR is finished

before 19200 ETUs. The UART will give an interrupt

with bit Buffer Full (BF) at 10.5 ETUs after the start

bit.

– On interrupt; TOR3 = 25H, TOR2 = 80H and

TOC = 65. Counter 1 keeps on counting

100

× 192 ETUs, while counter 2 and 3 counts

9600 ETUs. This sequence is repeated until the

character before the last one of the ATR.

– On interrupt TOR3 = 25H, TOR2 = 80H and

TOC = E5. Timer 1 will be automatically stopped at

the end of the last character of the ATR, allowing a

count of 19200 ETUs.

– On interrupt TOC = 00.

• Work Waiting Time (WWT) in T = 0 protocol;

– Before sending the first command to the card

TOR1, TOR2 and TOR3 should be loaded with the

correct 960

× WI × D value and TOC = 7C

– Timer 3, 2 and 1 will count the WWT between each

start bit

• Character Waiting Time (CWT) and Block Waiting Time

(BWT) in T = 1 protocol:

– Before sending the first block to the card, TOR3,

TOR2 and TOR1 should be loaded with the CWT and

TOC=7C

– Timer 3 + 2 + 1 will count the CWT between each

start bit

– Before the end of the block, TOR3, TOR2 and TOR1

should be loaded with the BWT

– Timer3+2+1 will count the BWT from the last start

bit of the sent block

– After reception of the first character of the block from

the card, TOR3, TOR2 and TOR1 should be loaded

with the CWT

– Timer3+2+1 will count the CWT between each

received start bit

– And so on.

• Before and after CLOCK STOP (example, where

ETU = 372 clock pulses):

– After the last received character on I/O, TOR3 = 0,

TOR2 = 6 and TOC = 61

– Timer3+2 will start counting 2232 clock pulses

before giving an interrupt

– On interrupt, the software may stop the clock to the

card

– When it is necessary to restart the clock, TOR3 = 0,

TOR2 = 2, TOC = 61 and restart the clock

– Timer3+2 gives an interrupt at 744 clock pulses,

and then the software can send the first command to

the card.

ISO UART REGISTERS

When the microcontroller wants to transmit a character to

the selected card, it writes the data in direct convention in

the UART Transmit Register (see Table 8). The

transmission:

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

the previous character has been transmitted and if the

extra guard time has expired; or

• Starts at the end of the extra guard time if this one has

not expired; or

• Does not start if the transmission of the previous

character is not completed.

In the case of a synchronous card (bit SAN within UCR2

is set), only D0 is relevant, and is copied on the I/O of the

selected card. When the microcontroller wants to read

data from the card it reads it from the UART Receive

In case of a synchronous card, only D0 is relevant and is a

copy of the state of the selected card I/O.

When needed, this register may be tied to a FIFO whose

length ‘n’ is programmable between 1 and 8.

If n > 1, then no interrupt is given until the FIFO is full. The

microcontroller may empty the FIFO at any time.

TDA8007B Datasheet(PDF) 13 Page - NXP Semiconductors

TDA8007B Datasheet(HTML) 13 Page - NXP Semiconductors

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36

Datasheet Download

Link URL