TWI Master addressing slave device with address value >7bit

[Nick_RA]

Hi

I need to communicate with a TWI device, a Analog MAX41473, which unfortinately has a slave address outside the range of 7-bit addressing. I'm not sure what they were thinking as the datasheet quotes

"The MAX41473/MAX41474 has a 7-bit I2C slave address that must be sent to the device following a START condition to initiate communication. The slave address is internally programmed to 0xD6 for WRITE and 0xD7 for READ."

and I've examined their eval kit with a logic analyser, and the address is definately 0xD6

The TWI Master driver docs say "Only 7 bit addressing". Is there any way around this?

[Turbo J]

The 7-bit address (without the RW bit) is just the 8-bit address (with the RW bit included) divided by two. You always have to carefully read datasheets in order to determine which one of these variants is used.

[Nick_RA]

You're absoliutely right, thank you, the address is actually 0x6B. Since last night I found the twi scanner example and verified it finds it OK.