ADC chip  to one of the GPIO

Hello Hopeton,

Thank you for the clarification.   Looking at the datasheet, it would not be possible to implement such an interface with just regular GPIO functionality.

Considering the MPx serial port pins, it might be possible to use the I2S serial ports to interface to the MAX1110, as long as you are not already using the serial port to interface to a host processor.   Looking at the serial port timing on page 16 in the Maxim datasheet, it looks like it can implement a 16-bit pulsed DSP serial mode interface.  The ADAU1701 supports pulse serial mode and you can also set up a data word size of 16-bits, and invert the frame sync pulse to be active low by switching the LRCLK polarity bit in the serial port registers.

However, it seems data transactions do not begin to transmit ADC data until it receives a control byte from the ADAU1701.  This would be very tricky (if not impossible to synchronize) from the SigmaStudio sample-by-sample processing signal flow, so I would say interfacing to such a device to the ADAU1701 cannot be done without some sort of interface logic or host microcontroller to transmit data to the ADAU1701 as I2S ADC data.

-JT

Hello Hopeton,

Thank you for the clarification.   Looking at the datasheet, it would not be possible to implement such an interface with just regular GPIO functionality.

Considering the MPx serial port pins, it might be possible to use the I2S serial ports to interface to the MAX1110, as long as you are not already using the serial port to interface to a host processor.   Looking at the serial port timing on page 16 in the Maxim datasheet, it looks like it can implement a 16-bit pulsed DSP serial mode interface.  The ADAU1701 supports pulse serial mode and you can also set up a data word size of 16-bits, and invert the frame sync pulse to be active low by switching the LRCLK polarity bit in the serial port registers.

However, it seems data transactions do not begin to transmit ADC data until it receives a control byte from the ADAU1701.  This would be very tricky (if not impossible to synchronize) from the SigmaStudio sample-by-sample processing signal flow, so I would say interfacing to such a device to the ADAU1701 cannot be done without some sort of interface logic or host microcontroller to transmit data to the ADAU1701 as I2S ADC data.

-JT