Keywarrior chip on starter-kit

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mhserrano
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Keywarrior chip on starter-kit

Post by mhserrano »

Hello people,

Is there any problem if i put a Keywarrior 16 chip (40 pin PDIP) on the socket of a IOwarrior 40 starter kit?


Can i use Keywarrior on these way, or there are any problems?

Thanks in advance,

Marco Serrano
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Re: Keywarrior chip on starter-kit

Post by Guido Körber »

If you only want to use USB there is no problem.
mhserrano
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Re: Keywarrior chip on starter-kit

Post by mhserrano »

Yes, i just want to use USB.

Another question Guido: If i want to use the external EEPROM to program Master Translation Tables to KW16-Flex, i will be able to make this on the PCB of the starter-kit modified?

If i use just the starter-kit with KW-16 chip inserted i can wire the keyboard matrix (to starter kit pins) and start to "play" the keyboard, or is not so simple?

Thanks in adance,

Marco Serrano
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Re: Keywarrior chip on starter-kit

Post by Guido Körber »

A KeyWarrior Flex needs the EEPROM, otherwise it does not work at all.
mhserrano
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Re: Keywarrior chip on starter-kit

Post by mhserrano »

Ok, thanks a lot.

There is any chip from KeyWarrior 16 family that don´t need EEPROM?

Regards
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Re: Keywarrior chip on starter-kit

Post by Guido Körber »

No standard part. Factory programmed key tables are only available for custom chips.
mhserrano
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Re: Keywarrior chip on starter-kit

Post by mhserrano »

Hello,

I have received my KW16 Flex chip + 24C02 EEpPROM and have inserted the chip on the IOW40 starter kit and fitted well. I have soldered the EEPROM as well, making the circuitry like the plan presented on KW16 datasheet.

But it seems that i ave a problem because i cant download any keyboard table into EEPROM. On the utility program i can select the download option but it gives me the message: "Download Failed!"

It seems to be a EEPROM problem, because KW16 is recognized well by windows xp.

Do you have some troubleshooting that i can make to see what is going wrong with EEPROM?

Thanks,

MS
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Re: Keywarrior chip on starter-kit

Post by Guido Körber »

First check the connections. Make sure the address pins of the 24C02 are pulled down and if there is a Write Enable pin it has to be pulled down too.
mhserrano
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Re: Keywarrior chip on starter-kit

Post by mhserrano »

Thanks Guido,

Sorry for these newbie question but what i must do to pull down those pins? In fact the instructions for KW16 says that we must pull down pins A0, A1 and A2. What i must do?

Where i can found that write enable pin?

Thanks for your help, i think i´m close to have it work well :)

MS
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Re: Keywarrior chip on starter-kit

Post by Guido Körber »

pulling down = pulling to a logic low level = connect to ground

The only unused pin on the 24C02 is /WE on some variants of the chip.
mhserrano
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Re: Keywarrior chip on starter-kit

Post by mhserrano »

Ok, it seems i´ve do that alright. Those pins (adress pins are already pulled down).

I´m using a condensator of 100nF between pin number 4 and Vcc. This is correct?

Thanks

MS
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Re: Keywarrior chip on starter-kit

Post by Guido Körber »

100nF between pins 4 & 8 is correct. Placed direct at the chip, no wires to the other end of the board.

Other possible problems are reversing the lines or forgetting the pull up resistor on SCL.
mhserrano
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Re: Keywarrior chip on starter-kit

Post by mhserrano »

Still dont work!

I´ve added the resistors: 9,8K is what i have in SCL line, between pin 6 from EEPROM and Y15 of KW16.

I checked with a multimeter some tension values on EEPROM pins when the starter kit connected to USB. Pins number 8 and 5 are with 5 volts. All the others 0 volts.

KW windows tool gives the same message: download failed!

Is it possible EEPROM is damaged?

Thanks
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Re: Keywarrior chip on starter-kit

Post by Guido Körber »

mhserrano wrote:I´ve added the resistors: 9,8K is what i have in SCL line, between pin 6 from EEPROM and Y15 of KW16.
Not quite what the application circuit is showing...
mhserrano
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Re: Keywarrior chip on starter-kit

Post by mhserrano »

Hello,

But we must put a pull-up resistor of 10K on these line? Or this resistor is installed on the starter-kit already?

Thanks
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