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Microchip electronics #2 :: Asperger Technical

 

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 Post subject: Re: Microchip electronics
Post Number:#11  PostPosted: Thu Jul 30, 2009 6:52 pm 
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Joined: 3rd April, 2007
Posts: 90
The Nutricia Flocare 800 pump is still in production. Does your HD63B03YP microcontroller have a Hitachi or a Renesas logo on it?

http://www.nutriciaflocare.com/flocare800.php


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     Post subject: Re: Microchip electronics
    Post Number:#12  PostPosted: Sun Aug 30, 2009 10:12 pm 
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    Joined: 1st July, 2007
    Posts: 20
    Location: UK
    The HD63B03YP microcontroller definitely had a Hitachi logo on it.

    I'm interested in Japanese microcontrollers but there doesn't seem to be much information about them on the internet for people who want to start using them. Am I right in saying that microcontrollers from Panasonic, Toshiba, NEC, Fujitsu, and Sanyo are not popular in Europe and the US, and that very few people use them? If they are unpopular then why are they unpopular?


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       Post subject: Re: Microchip electronics
      Post Number:#13  PostPosted: Thu Sep 03, 2009 1:06 pm 
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      Joined: 3rd April, 2007
      Posts: 90
      2 plus 8 wrote:
      I'm interested in Japanese microcontrollers but there doesn't seem to be much information about them on the internet for people who want to start using them.


      There's tons of information on the manufacturer's websites including datasheets for particular devices and documentation about the development systems and programming.

      Quote:
      Am I right in saying that microcontrollers from Panasonic, Toshiba, NEC, Fujitsu, and Sanyo are not popular in Europe and the US, and that very few people use them?


      Japanese microcontrollers are nowhere near as popular as western microcontrollers in the US and Europe for a variety of reasons. Some large companies use them but they have made little headway into most smaller and medium sized industries. There are a few exceptions such as the Hitachi H8 used in the Lego Mindstorms smart brick, and also by a small RF equipment manufacturer in Hampshire.

      Many Japanese microcontrollers are designed for use in consumer electronics and contain all sorts of weird and wonderful features and on-chip peripherals specific to particular consumer goods such as televisions or DVD players. NEC developed the uPD1700 series in the 1970s for use in car radio tuners, which included an inbuilt phase-locked-loop frequency synthesiser to replace the mechanical tuning controls which were commonplace at the time. The frequency synthesiser was specifically matched to the AM and FM bands used for broadcasting. Several Japanese microcontrollers for CRT televisions have an inbuilt video character generation circuit to superimpose graphics on the screen when changing channels, volume levels, etc. Many of these microcontrollers have a pin to connect the remote control phototransistor to. This received signal then enters a circuit that decodes the remote control signals which issues an interrupt and places a value corresponding to a particular button in a register for software to read. The lack of consumer electronics manufacturers in the US and Europe means that the market for microcontrollers with these features is very small. Several Japanese companies manufacture 4 bit devices for use in equipment like microwave ovens and stereos where only a simple microcontroller is required.

      Quote:
      If they are unpopular then why are they unpopular?


      Mainly because of a closed shop mentality of the manufacturers towards small scale users.

      Their marketing departments are geared towards selling to customers that purchase tens of thousands of a particular device, such as consumer electronics manufacturers which buy directly, rather than via component distributors. An increasing number of American and European semiconductor distributors are offering Japanese microcontrollers to private users and small businesses, but they rarely offer the devices with 'interesting' features for consumer electronics for reasons outlined above.

      Their technical departments tend to be secretive and often reluctant to release information on how to program microcontrollers to the general public. They expect that users will use the manufacturer's approved development systems and software tools which are usually very expensive (typically greater than £1,000) making them unviable purchases for small scale users. This secretive nature of the microcontroller manufacturers is why open source and affordable third party development systems only exist for a handful of Japanese microcontroller families. I have tried to obtain information about the Toshiba TLCS-870 8 bit and TLCS-900 16 bit microcontrollers in order to create an open source development system for them without any success.


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         Post subject: Re: Microchip electronics
        Post Number:#14  PostPosted: Fri Sep 04, 2009 3:50 pm 
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        Joined: 1st July, 2007
        Posts: 20
        Location: UK
        Canopus wrote:
        Their technical departments tend to be secretive and often reluctant to release information on how to program microcontrollers to the general public. They expect that users will use the manufacturer's approved development systems and software tools which are usually very expensive (typically greater than £1,000) making them unviable purchases for small scale users. This secretive nature of the microcontroller manufacturers is why open source and affordable third party development systems only exist for a handful of Japanese microcontroller families. I have tried to obtain information about the Toshiba TLCS-870 8 bit and TLCS-900 16 bit microcontrollers in order to create an open source development system for them without any success.


        I'm sure I read somewhere that one Japanese company is very forthcoming with information on how to program its microcontrollers and is the number one supplier for the amateur robotics community in Japan. I don't think the PIC is popular in Japan.


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