Hello,
I'm using the TAS5717 audio amplifier controlled by an ARM-Cortex-M3 microcontroller on a custom board. I followed exactly the instruction list for getting the device running (like described here: http://e2e.ti.com/support/amplifiers/audio_amplifiers/f/6/t/105299.aspx). Further I proofed the communication on the I²C and I²S interfaces via oszilloscope, and measured a pwm-signal on the analog outputs of the amplifier (50% duty cycle). The problem is, that no audio signal consversion takes place. For test purposes I supply the IC with a simple continous ramp signal on both (l+r) channels. Error status register returns 0.
I²S-configuration:
I²S-32-fs-Format (Phillips) (fig. 28 datasheet), SCLK = 44100 * 2 * 16 Hz = 1411200 Hz, SCLK continues
MCLK is absent (logical undefined). According to the datasheet the IC should be able to generate this main clock by itself?
Do you have any idea solving this problem.
Thanks in advance!
Andreas