DS90UB928Q-Q1: about Slave ID and Slave Alias ID

Betty Guo

Part Number: DS90UB928Q-Q1

Hi team,

one a baisc question about Slave ID and Slave Alias ID.

for example, 927-928-touch. My understaning is that if 927 need remote control touch, the Slave Alias ID should be match the touch ID, right?

how about the Slave ID? what's the relationship between Slave ID and Slave Alias ID? I know, the physical ID of touch is 8bit, Slave ID and Slave Alias ID is 7bit.

for example, if the touch ID= 0x24, 0010 0100, the Slave ID is left shift by 1bit, and select [7:1]

so, the Slave ID= 0x48, 0100 1000, right? how about the Slave Alias ID?

thank you.

over 4 years ago

0 Michael.Walker over 4 years ago

TI__Mastermind 19720 points

Hi Betty,

The Slave ID is the I2C address of the touch controller. The Slave Alias ID is the I2C address that you would like use to access the touch controller from the 927 side. They can be the same address if you would like. if the touch controller's 7 bit I2C address is 0x24 then set the slave ID to be 0x48. You can set the Slave Alias ID to the same value if you would like.

Regards,

Michael W.

0 Betty Guo over 4 years ago in reply to Michael.Walker

TI__Expert 7300 points

thanks Michael,

so, there no any calculate relationship between Slave ID and Slave Alias ID, right?

if yes, how can we make sure the Slave Alias ID is access the touch instead of other slave device.

0 Michael.Walker over 4 years ago in reply to Betty Guo

TI__Mastermind 19720 points

Hi,

Yes, there is no calculated relation between the Slave ID and Slave Alias ID.

You Can make sure by having the Slave Alias ID unique from other I2C address's on the I2C bus.

Regards,

Michael W.

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DS90UB928Q-Q1: about Slave ID and Slave Alias ID