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TLC3548: TLC3548, Mode 11, CS Initiates Operations

Iwase Sou
Prodigy 20 points
Part Number: TLC3548

Dear Support Team.

When I use [ Mode 11, CS Initiates Operations ], after a select channel command is issued, does my controller need to wait for conversion time before next select channel command ?

  • 0
    TI__Guru**** 180751 points

    Hi Iwase!

    Welcome to our e2e Forum!

    Great question on the TLC3548 too by the way!  After you set the CFR with your desired sweep sequence (Table 2; D[4:3]), you would write to the device as shown in Figure 19.  You send /CS low, write any CH nibble (0x0xxx for example) for each of the channels in your sequence.  You should see the INT pin go active and then you can send the Read FIFO command to get the conversion results from SDO.

  • 0 in reply to Tom Hendrick
    Prodigy 20 points

    Hi Tom

    Thank you for answer.

    You write "You send /CS low, write any CH nibble (0x0xxx for example) for each of the channels in your sequence. 

    I would like to know whether I should wait conversion time between CH nibbles.

    [ CH nibble ] [ wait conversion ] [CH nibble ] [ wait conversion ] [wait INT] or [CH nibble ] [CH nibble ] [wait INT] ?

  • +1 in reply to Iwase Sou
    TI__Guru**** 180751 points

    Hi Iwase,

    You should wait the conversion time between CH nibbles.