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Title: Question about CD emulator schematic Post by: DdJ on 11 Dec 2003, 14:07 Hi,
Why don't you use the PCA82C250 RxD pin instead of the LM339? Thanks in advance for answering, Kind regards, Dave Title: Re: Question about CD emulator schematic Post by: Vitat on 16 Dec 2003, 03:02 Quote from: DdJ Why don't you use the PCA82C250 RxD pin instead of the LM339? PCA82C250 - is a CAN bus driver IC. CANbus and IP-Bus signals are little different. Internal comparator in PCA82C250 have another hysteresis and not compatible with IP-Bus protocol.IP-Bus comparator can see output from CANbus driver. But CANbus comparator can not see output from IP-Bus driver. I using simple comparator and adapt hysteresis with 10k and 1M resistors for IP-Bus line. Title: Question about CD emulator schematic Post by: Anonymous on 17 Jan 2004, 13:48 Quote from: Vitat Quote from: DdJ Why don't you use the PCA82C250 RxD pin instead of the LM339? PCA82C250 - is a CAN bus driver IC. CANbus and IP-Bus signals are little different. Internal comparator in PCA82C250 have another hysteresis and not compatible with IP-Bus protocol.IP-Bus comparator can see output from CANbus driver. But CANbus comparator can not see output from IP-Bus driver. I using simple comparator and adapt hysteresis with 10k and 1M resistors for IP-Bus line. Title: Question about CD emulator schematic Post by: Vitat on 18 Jan 2004, 02:29 What is IE-Bus?
Title: Question about CD emulator schematic Post by: Anonymous on 20 Jan 2004, 10:45 IE BUS is about the car control¡¯s protocol of the NEC, these kinds of chips have uPD72042b and uPD6708, you can find them in www.necel.com. I have used upd6708 and Atmega8 to get the connection between HONDA radio (IE-BUS) and ALPine CD changer (M-BUS), It was succeed .Now I am making the connection between TOYOTA radio (IP-BUS) and CD changer (S-BUS) which made in Korea. Could you please offer me the protocol and the date of IP-BUS? If I get your help I will offer the message which you interest.
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