| ??? 10/06/06 01:40 Modified: 10/06/06 01:45 Read: times |
#125869 - ISO7816 transmission speed Responding to: ???'s previous message |
Yes, after some more researching I found out about the formula as well as the clock speed required. It seems that the ISO7816's clock signal needs to be 3.58MHz at least initially to get the required 9600bps. From my understanding UART is able to supply a clock based on some prescalar on the main MCU clock, so does that mean that the MCU clock has to be some multiple of 3.58MHz? How does the value 372 come into play here as far as the MCU's UART is concerned? I suppose it's not recommended to use an external clock for the smart card due to sync issues as well as ISO7816's capabilities to change the clock frequency?
Also, since UART is full duplex with TX/RX and ISO7816 is only half duplex with just 1 I/O signal, do I need a mux there or can I just wire them together w/o any issues? |
| Topic | Author | Date |
| Emulating ISO7816 smart card interface with generi | 01/01/70 00:00 | |
| See here | 01/01/70 00:00 | |
| Interesting read | 01/01/70 00:00 | |
| Can;t find the article | 01/01/70 00:00 | |
| Here it is | 01/01/70 00:00 | |
| ISO7816 transmission speed | 01/01/70 00:00 | |
| ISO7816 transmission speed | 01/01/70 00:00 | |
| Lets not get confused! | 01/01/70 00:00 | |
| A little confused | 01/01/70 00:00 | |
| 2 stop bits? | 01/01/70 00:00 | |
| Read up on async communications | 01/01/70 00:00 | |
| Parity detection | 01/01/70 00:00 | |
| use UART mode 3 - that's 9 bits! | 01/01/70 00:00 | |
| Same question on AVRfreaks? | 01/01/70 00:00 | |
| GSM Only? | 01/01/70 00:00 | |
| not exactly GSM only.... | 01/01/70 00:00 | |
All types | 01/01/70 00:00 |