STA321TR View Datasheet(PDF) - STMicroelectronics

Part Name

Description

Manufacturer

STA321TR

4-channel digital audio system with FFX™ driver

STMicroelectronics 

STA321

I2C disabled (microless) mode

The input sampling frequency must be between 32 kHz and 48 kHz and the master clock

input (MCLK or XTI) must be 256 * fS.

The CMOS bridge FFX output is configured in line-out mode:

z left channel binary on OUT1

z right channel binary on OUT2

z zero signal binary (duty cycle 50%) on OUT3

z pop-free digital ramp active

z volume control not effective (always 0 dB)

z switching frequency 384 kHz.

The external amplifier FFX output is configured in BTL mode:

z left channel BTL (new ternary modulation) on EAPWM1 and EAPWM2

z right channel BTL (new ternary modulation) on EAPWM1 and EAPWM2

z volume control is effective

z switching frequency 384 kHz.

The headphone detection is disabled.

The CLKOUT pad is active at the PLL frequency of 2048 * fS.

Doc ID 15351 Rev 3

151/157

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