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TIR1000: Setup time for U_RXD falling

Expert 4620 points

Replies: 1

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Part Number: TIR1000

Hello team,

We can see a description on "When a falling edge is detected on IR_RXD, U_RXD falls on the next rising edge of 16XCLK with sufficient setup time." in the section "7.4.2 IrDA Decoder Function".
How long do we need to estimate for "sufficient setup time"?

Thanks in advance.
S.Sawamoto

  • Hey Sawamoto-san,

    It looks like the set up time is in reference to the fall time of our device. Meaning that our device will drive the U_RXD line low on the rising edge of the 16x clock plus about ~9.2 nanoseconds though this number can be larger if the U_RXD pin has high capcaitance/series resistance.

    Thanks,

    -bobby

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