Does anyone have usb schematics of interface like this?
is it "usb to ttl" interface? if so, 5v or 3.3v?
what about clock pin 153khz (9600baud)? is it needed?
this is serial com interface scheme, but i look for usb one:
Does anyone have usb schematics of interface like this?
is it "usb to ttl" interface? if so, 5v or 3.3v?
what about clock pin 153khz (9600baud)? is it needed?
this is serial com interface scheme, but i look for usb one:
Last edited by manocao; 17th October, 2010 at 08:24 PM.
Instead MAX232 you have FT232RL + few his peripherals for correct work.
Galletto 2012 v54 full with JTAG and Mini available
Big Stars never dies:
Colin McRae (1968 ***8211; 2007)
Richard Burns (1971 ***8211; 2005)
Georg Plasa (1960 - 2011
thanks m8, but where can i find usb schematics with FT232RL?
is there any schematics based on ftdi "usb to ttl" converter + few more components like resistors and transistor? (very easy to build)
i think it must a very simple interface like this, with no need of programming any chip (like atmel, pic, etc)
Last edited by manocao; 17th October, 2010 at 11:24 PM.
anyway, i think i can build this serial (rs232 com port) version and use my cheap "usb to rs232 converter" (<3€ on ebay) because interface works at 9600 bps, so there will not be speed incompatibility problems
maybe i could even remove max232, and connect chip directly to usb to rs232 converter
and what's more, connect transistor to "usb-to-ttl converter" and forget about serial port
cp2102 version:
prolific version:
i think cd4060 chip could also be removed as it is meant for 153.6khz clock, that is, 9600 baud, which we can take from any of the converters
suggestions?
Last edited by manocao; 19th October, 2010 at 07:57 AM.
I've already told ya. On first or second schematics, replace MAX232 with FT232. That's how you can get USB version. Now, you can't remove CD4060 because, communication logic in Nissan cars don't have internal clock, so you need to give it this way. That's for older cars. For newer you don't need external clock.
Galletto 2012 v54 full with JTAG and Mini available
Big Stars never dies:
Colin McRae (1968 ***8211; 2007)
Richard Burns (1971 ***8211; 2005)
Georg Plasa (1960 - 2011
what about something like this? would it work? should i reverse rdx and tdx?
Last edited by manocao; 19th October, 2010 at 06:50 PM.
which one is correct, can someone help?
original rs232 (data reversed; rx-tx and tx-rx)
-------------
pin J1 pin max232
1 Rx -> 11 Tx1 IN
2 Tx -> 12 Rx2 OUT
modded option 1 (as in picture above; data direct rx-rx and tx-tx)
----------------
pin J1 pin usb-ttl converter
1 Rx -> 4 Rx
2 Tx -> 3 Tx
modded option 2 (data reversed; rx-tx and tx-rx)
----------------
pin J1 pin usb-ttl converter
1 Rx -> 3 Tx
2 Tx -> 4 Rx
these are the 2 options. which one is correct?
Hello, Have you got proper schematic for Consult Interface with Ft232?
I've done that, but not work
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