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i2c slave address conflict between B-LCDAD-HDMI1 and B-CAMS-OMV.

WLeun.2
Associate

When using both B-LCDAD-HDMI1 and B-CAMS-OMV together on STM32M747I-Disc, HDMI has no output. Finally, found that i2c address of OV5640 use the same address of ADV7533 CEC-DSI. Any solution?

1 REPLY 1
GET
ST Employee

Hello WLeun.2,

Sorry only detected your message recently. In case you would like to change the I2C address on ADV7533, you can handle the R5 resistor and put a 2 kohm recommended pull-down on PD pin. This would have effect to change the I2C address, but would also change the polarity of Power-Down PD pin : both I2C address and PD polarity are determined at ADV7533 power-up (when the supplies are applied to ADV7533). Explanation: The PD pin has an integrated pull-up for '1' polarity by default, and external pull-down can bring a forced '0' polarity at power-up. (Take care about any resistor present on pin 57 CN1 of Host side).

Hope this answers to your need. Best Regards,