Announce two new product: SmartCard Reader Rockey200 and USB2.0 Extension Cable

ROCKEY 200 is a handy and portable USB Smart Card reader that can perform read/write operations on any ISO 7816-1/2/3/4 smart cards which are compatible with protocol T=0 and T=1.

USB2.0 Extension Cable With high speed USB 2.0 devices such as USB token ,USB Card Reader and so on.

Come to try it now!

How to calculate baud rate OR speed of CARD from ETU and ATR ?

JavaCard Applet Development Related Questions and Answers.
atr7816
Posts: 7
Joined: Sat Apr 28, 2018 7:19 am
Points: 54
Contact:

How to calculate baud rate OR speed of CARD from ETU and ATR ?

Postby atr7816 » Sat Apr 28, 2018 7:43 am

I have read 7816 for several days.But I still confused that how to calculate baud rate OR speed of CARD from ETU and ATR .The default speed is 9600,how to calculate out .

roundtable
Posts: 14
Joined: Mon Sep 18, 2017 9:52 pm
Points: 168
Contact:

Re: How to calculate baud rate OR speed of CARD from ETU and ATR ?

Postby roundtable » Tue May 15, 2018 2:08 am

HI, you can refer below table:
frequency was set to 3.571200 MHz
+--------+----------+--------+------------+----------------+-----------------+-----------------+
| TA1 | Fi | Di | f(max) MHz | periods of ETU | duration of ETU | Baud rate |
+========+==========+========+============+================+=================+=================+
| 1 | 372 | 1 | 4 | 372 | 104.17 us | 9600 |
+--------+----------+--------+------------+----------------+-----------------+-----------------+
| 2 | 372 | 2 | 4 | 186 | 52.08 us | 19200 |
+--------+----------+--------+------------+----------------+-----------------+-----------------+
| 3 | 372 | 4 | 4 | 93 | 26.04 us | 38400 |
+--------+----------+--------+------------+----------------+-----------------+-----------------+
| 8 | 372 | 12 | 4 | 31 | 8.68 us | 115200 |
+--------+----------+--------+------------+----------------+-----------------+-----------------+
| 11 | 372 | 1 | 5 | 372 | 104.17 us | 9600 |
+--------+----------+--------+------------+----------------+-----------------+-----------------+
| 12 | 372 | 2 | 5 | 186 | 52.08 us | 19200 |
+--------+----------+--------+------------+----------------+-----------------+-----------------+
| 13 | 372 | 4 | 5 | 93 | 26.04 us | 38400 |
+--------+----------+--------+------------+----------------+-----------------+-----------------+
| 18 | 372 | 12 | 5 | 31 | 8.68 us | 115200 |
+--------+----------+--------+------------+----------------+-----------------+-----------------+
| 21 | 558 | 1 | 6 | 558 | 156.25 us | 6400 |
+--------+----------+--------+------------+----------------+-----------------+-----------------+
| 22 | 558 | 2 | 6 | 279 | 78.12 us | 12800 |
+--------+----------+--------+------------+----------------+-----------------+-----------------+
| 31 | 744 | 1 | 8 | 744 | 208.33 us | 4800 |
+--------+----------+--------+------------+----------------+-----------------+-----------------+
| 32 | 744 | 2 | 8 | 372 | 104.17 us | 9600 |
+--------+----------+--------+------------+----------------+-----------------+-----------------+
| 33 | 744 | 4 | 8 | 186 | 52.08 us | 19200 |
+--------+----------+--------+------------+----------------+-----------------+-----------------+
| 34 | 744 | 8 | 8 | 93 | 26.04 us | 38400 |
+--------+----------+--------+------------+----------------+-----------------+-----------------+
| 38 | 744 | 12 | 8 | 62 | 17.36 us | 57600 |
+--------+----------+--------+------------+----------------+-----------------+-----------------+
| 41 | 1116 | 1 | 12 | 1116 | 312.50 us | 3200 |
+--------+----------+--------+------------+----------------+-----------------+-----------------+
| 42 | 1116 | 2 | 12 | 558 | 156.25 us | 6400 |
+--------+----------+--------+------------+----------------+-----------------+-----------------+
| 43 | 1116 | 4 | 12 | 279 | 78.12 us | 12800 |
+--------+----------+--------+------------+----------------+-----------------+-----------------+
| 48 | 1116 | 12 | 12 | 93 | 26.04 us | 38400 |
+--------+----------+--------+------------+----------------+-----------------+-----------------+
| 51 | 1488 | 1 | 16 | 1488 | 416.67 us | 2400 |
+--------+----------+--------+------------+----------------+-----------------+-----------------+
| 52 | 1488 | 2 | 16 | 744 | 208.33 us | 4800 |
+--------+----------+--------+------------+----------------+-----------------+-----------------+
| 53 | 1488 | 4 | 16 | 372 | 104.17 us | 9600 |
+--------+----------+--------+------------+----------------+-----------------+-----------------+
| 54 | 1488 | 8 | 16 | 186 | 52.08 us | 19200 |
+--------+----------+--------+------------+----------------+-----------------+-----------------+
| 55 | 1488 | 16 | 16 | 93 | 26.04 us | 38400 |
+--------+----------+--------+------------+----------------+-----------------+-----------------+
| 58 | 1488 | 12 | 16 | 124 | 34.72 us | 28800 |
+--------+----------+--------+------------+----------------+-----------------+-----------------+
| 61 | 1860 | 1 | 20 | 1860 | 520.83 us | 1920 |
+--------+----------+--------+------------+----------------+-----------------+-----------------+
| 62 | 1860 | 2 | 20 | 930 | 260.42 us | 3840 |
+--------+----------+--------+------------+----------------+-----------------+-----------------+
| 63 | 1860 | 4 | 20 | 465 | 130.21 us | 7680 |
+--------+----------+--------+------------+----------------+-----------------+-----------------+
| 68 | 1860 | 12 | 20 | 155 | 43.40 us | 23040 |
+--------+----------+--------+------------+----------------+-----------------+-----------------+
| 69 | 1860 | 20 | 20 | 93 | 26.04 us | 38400 |
+--------+----------+--------+------------+----------------+-----------------+-----------------+
| 91 | 512 | 1 | 5 | 512 | 143.37 us | 6975 |
+--------+----------+--------+------------+----------------+-----------------+-----------------+
| 92 | 512 | 2 | 5 | 256 | 71.68 us | 13950 |
+--------+----------+--------+------------+----------------+-----------------+-----------------+
| 93 | 512 | 4 | 5 | 128 | 35.84 us | 27900 |
+--------+----------+--------+------------+----------------+-----------------+-----------------+
| 94 | 512 | 8 | 5 | 64 | 17.92 us | 55800 |
+--------+----------+--------+------------+----------------+-----------------+-----------------+
| 95 | 512 | 16 | 5 | 32 | 8.96 us | 111600 |
+--------+----------+--------+------------+----------------+-----------------+-----------------+
| 96 | 512 | 32 | 5 | 16 | 4.48 us | 223200 |
+--------+----------+--------+------------+----------------+-----------------+-----------------+
| 97 | 512 | 64 | 5 | 8 | 2.24 us | 446400 |
+--------+----------+--------+------------+----------------+-----------------+-----------------+
| A1 | 768 | 1 | 7.500 | 768 | 215.05 us | 4650 |
+--------+----------+--------+------------+----------------+-----------------+-----------------+
| A2 | 768 | 2 | 7.500 | 384 | 107.53 us | 9300 |
+--------+----------+--------+------------+----------------+-----------------+-----------------+
| A3 | 768 | 4 | 7.500 | 192 | 53.76 us | 18600 |
+--------+----------+--------+------------+----------------+-----------------+-----------------+
| A4 | 768 | 8 | 7.500 | 96 | 26.88 us | 37200 |
+--------+----------+--------+------------+----------------+-----------------+-----------------+
| A5 | 768 | 16 | 7.500 | 48 | 13.44 us | 74400 |
+--------+----------+--------+------------+----------------+-----------------+-----------------+
| A6 | 768 | 32 | 7.500 | 24 | 6.72 us | 148800 |
+--------+----------+--------+------------+----------------+-----------------+-----------------+
| A7 | 768 | 64 | 7.500 | 12 | 3.36 us | 297600 |
+--------+----------+--------+------------+----------------+-----------------+-----------------+
| A8 | 768 | 12 | 7.500 | 64 | 17.92 us | 55800 |
+--------+----------+--------+------------+----------------+-----------------+-----------------+
| B1 | 1024 | 1 | 10 | 1024 | 286.74 us | 3487 |
+--------+----------+--------+------------+----------------+-----------------+-----------------+
| B2 | 1024 | 2 | 10 | 512 | 143.37 us | 6975 |
+--------+----------+--------+------------+----------------+-----------------+-----------------+
| B3 | 1024 | 4 | 10 | 256 | 71.68 us | 13950 |
+--------+----------+--------+------------+----------------+-----------------+-----------------+
| B4 | 1024 | 8 | 10 | 128 | 35.84 us | 27900 |
+--------+----------+--------+------------+----------------+-----------------+-----------------+
| B5 | 1024 | 16 | 10 | 64 | 17.92 us | 55800 |
+--------+----------+--------+------------+----------------+-----------------+-----------------+
| B6 | 1024 | 32 | 10 | 32 | 8.96 us | 111600 |
+--------+----------+--------+------------+----------------+-----------------+-----------------+
| B7 | 1024 | 64 | 10 | 16 | 4.48 us | 223200 |
+--------+----------+--------+------------+----------------+-----------------+-----------------+
| C1 | 1536 | 1 | 15 | 1536 | 430.11 us | 2325 |
+--------+----------+--------+------------+----------------+-----------------+-----------------+
| C2 | 1536 | 2 | 15 | 768 | 215.05 us | 4650 |
+--------+----------+--------+------------+----------------+-----------------+-----------------+
| C3 | 1536 | 4 | 15 | 384 | 107.53 us | 9300 |
+--------+----------+--------+------------+----------------+-----------------+-----------------+
| C4 | 1536 | 8 | 15 | 192 | 53.76 us | 18600 |
+--------+----------+--------+------------+----------------+-----------------+-----------------+
| C5 | 1536 | 16 | 15 | 96 | 26.88 us | 37200 |
+--------+----------+--------+------------+----------------+-----------------+-----------------+
| C6 | 1536 | 32 | 15 | 48 | 13.44 us | 74400 |
+--------+----------+--------+------------+----------------+-----------------+-----------------+
| C7 | 1536 | 64 | 15 | 24 | 6.72 us | 148800 |
+--------+----------+--------+------------+----------------+-----------------+-----------------+
| C8 | 1536 | 12 | 15 | 128 | 35.84 us | 27900 |
+--------+----------+--------+------------+----------------+-----------------+-----------------+
| D1 | 2048 | 1 | 20 | 2048 | 573.48 us | 1743 |
+--------+----------+--------+------------+----------------+-----------------+-----------------+
| D2 | 2048 | 2 | 20 | 1024 | 286.74 us | 3487 |
+--------+----------+--------+------------+----------------+-----------------+-----------------+
| D3 | 2048 | 4 | 20 | 512 | 143.37 us | 6975 |
+--------+----------+--------+------------+----------------+-----------------+-----------------+
| D4 | 2048 | 8 | 20 | 256 | 71.68 us | 13950 |
+--------+----------+--------+------------+----------------+-----------------+-----------------+
| D5 | 2048 | 16 | 20 | 128 | 35.84 us | 27900 |
+--------+----------+--------+------------+----------------+-----------------+-----------------+
| D6 | 2048 | 32 | 20 | 64 | 17.92 us | 55800 |
+--------+----------+--------+------------+----------------+-----------------+-----------------+
| D7 | 2048 | 64 | 20 | 32 | 8.96 us | 111600 |
+--------+----------+--------+------------+----------------+-----------------+-----------------+
Note: duration of ETU is computed by Fi/(Di * frequency), only for reference.

BirdKing
Posts: 24
Joined: Wed Nov 04, 2015 7:23 am
Points: 138
Contact:

Re: How to calculate baud rate OR speed of CARD from ETU and ATR ?

Postby BirdKing » Thu May 17, 2018 1:42 am

First, we must understand several concepts:
1. Clock cycle: T, frequency f = (1/T)
2. Baud rate: how many bits per second can be transmitted
3、1 etu = (Fi/Di)/f

So,
1 etu = (Fi/Di)/f = 372 * T
baud rate = 1 second / 1 etu = 1 second / ((Fi/Di) * T) = (1 second * f) /(Fi/Di)

For example:
TA1 = 1, Fi = 372, Di = 1, f = 3.571200 MHz
baud rate = 1000000 * 3.571200 /372.0 = 9600.0

I hope I can help you.

atr7816
Posts: 7
Joined: Sat Apr 28, 2018 7:19 am
Points: 54
Contact:

Re: How to calculate baud rate OR speed of CARD from ETU and ATR ?

Postby atr7816 » Tue Jun 12, 2018 7:22 am

it is so great, so cool !!! thanks to all.


Return to “Questions & Answers”

Who is online

Users browsing this forum: Baidu [Spider], Google [Bot] and 2 guests

JavaCard OS : Disclaimer