• State Resolved
  • Locked Locked
  • Replies 1 reply
  • Subscribers 33 subscribers
  • Views 239 views
  • Users 0 members are here
Support feedback
Options
Options
Related

This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

SN65DP159: I2C_EN

Zeming Kong
Expert 3515 points
Part Number: SN65DP159

Hi team,

Could you help confirm below questions?

1. VIL & VIH range for I2C_EN?

2. Recommended pullup & pulldown resistance for I2C_EN?

3. Reg 0Bh value will change automatically or need master's command for transition from HDMI 1.4 to HDMI 2.0?

Best,
Zeming

  • +1
    TI__Guru**** 176881 points

    Zeming

    For the I2C_EN pin,

    Pull-up: 65k +/- 10%
    Pull-down: 0 to 65k + 10%

    Register 0x0Bh bit 1 is automatically updated from snooping of HDMI source's I2C write to HDMI sink slave address 0xA8 offset 0x20 bit 1 that occurred on the SDA_SRC/SCL_SRC interface. 

    But you can also manually forcing TMDS_CLOCK_RATIO_STATUS to 1 by setting DDC_TRAIN_SET bit to 1 first.

    Thanks
    David