Sjouke Burry wrote:

TT_Man wrote:
"mark krawczuk" wrote in message
news
hi, i`m trying to build a bdm32 interface to program my saab trionic ecu
, put the parts list is for hc ttl ic`s , i have ls ttl ic`s , are these
interchangable ?
thanks,
mark k

Sometimes....... If your interface and drive to the saab unit is 5V, then
probably....... if it's 5V then definitely no.


and some extra pull-up resistors on ls out to cmos in does
not hurt either.

That does certainly help.

Graham