WM8994ECSSLASHR datasheet(38/363 Pages) CIRRUS

Nome de Peças	WM8994ECS/R

Descrição Electrónicos	Multi-channel Audio Hub CODEC for Smartphones

PDF	363 Pages

Scroll/Zoom	100%

Fabricante Electrônico	CIRRUS [Cirrus Logic]

Página de início	http://www.cirrus.com

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38 / 363 page

WM8994

Rev 4.6

DIGITAL AUDIO INTERFACE - TDM MODE

When TDM operation is used on the ADCDATn pins, it is important that two devices do not attempt to

drive the ADCDATn pin simultaneously. To support this requirement, the ADCDATn pins can be

configured to be tri-stated when not outputting data.

The timing of the WM8994 ADCDATn tri-stating at the start and end of the data transmission is

described in Figure 6 below.

BCLK

ADCDAT

ADCDAT set-up time

ADCDAT release time

ADCDAT undriven (tri-state)

ADCDAT valid (CODEC output)

ADCDAT valid

ADCDAT undriven (tri-state)

Figure 6 Audio Interface Timing - TDM Mode

Test Conditions

The following timing information is valid across the full range of recommended operating conditions.

PARAMETER

MIN

TYP

MAX

UNIT

TDM Timing - Master Mode

ADCDAT setup time from BCLK falling edge

ADCDAT release time from BCLK falling edge

TDM Timing - Slave Mode

ADCDAT setup time from BCLK falling edge

ADCDAT release time from BCLK falling edge

WM8994ECS/R Folha de dados(PDF) 38 Page - Cirrus Logic