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LM8330: LM8330 windows O.S. driver and support Multi-key

Ray Chang
Intellectual 1345 points
Part Number: LM8330
Other Parts Discussed in Thread: TCA8418E, TCA8418

Hi Team,

Would you please help to check below questions for LM8330?

1: Could the LM8330 support Multi-key (support 4 keys ) ?

2: Have any windows O.S. driver to support LM8330?

3: Has it ever be used on laptop application ? 


  • 0
    TI__Guru 72621 points

    Hey Ray,

    May I ask why this device was chosen? Are you only needing the keypad function or do you need the PWM function as well? I ask because we typically see the TCA8418/TCA8418E for keypad matrix applications.

    "1: Could the LM8330 support Multi-key (support 4 keys ) ?"

    This is mentioned in page 1 and 21 of the datasheet. You will likely need low voltage switching diodes to support this kind of application (prevent ghosting from occurring).

    "2: Have any windows O.S. driver to support LM8330?"

    We do not provide direct software support for our devices outside what has been uploaded on the web.

    "3: Has it ever be used on laptop application ? "

    I am sure it has been used for that application but I do not have the ability to provide details on that.

     

    -Bobby

  • 0 in reply to BOBBY
    TI__Intellectual 1345 points

    Hi Bobby,

    The keypad more than 84 keys, thus LM8330 be chosen.

    Does the TCA8418 could support over 84 keys?

  • 0 in reply to Ray Chang
    TI__Guru 72621 points

    Hey Ray,

    "Does the TCA8418 could support over 84 keys?"

    Unfortunately not, at most TCA8418 supports 80 keys. (10 columns and 8 rows = 80 keys)

    -Bobby