WM8770 Просмотр технического описания (PDF) - Wolfson Microelectronics plc

Номер в каталоге

Компоненты Описание

производитель

WM8770

24-bit, 192kHz 8-Channel Codec with Volume Control

Wolfson Microelectronics plc 

Production Data

DIGITAL AUDIO INTERFACE – SLAVE MODE

WM8770

BCLK

ADCLRC

WM8770

CODEC DACLRC

DOUT

DIN1/2/3/4

4

DSP

ENCODER/

DECODER

Figure 4 Audio Interface – Slave Mode

BCLK

DACLRC/

ADCLRC

DIN1/2/3/4

DOUT

tBCH

tBCL

tBCY

tDS

tDD

tLRH

tDH

tLRSU

Figure 5 Digital Audio Data Timing – Slave Mode

Test Conditions

AVDD = 5V, DVDD = 3.3V, AGND = 0V, DGND = 0V, TA = +25oC, fs = 48kHz, MCLK = 256fs, ADC/DAC in Slave Mode unless

otherwise stated.

PARAMETER

SYMBOL

Audio Data Input Timing Information

BCLK cycle time

tBCY

BCLK pulse width high

tBCH

BCLK pulse width low

tBCL

DACLRC/ADCLRC set-up

time to BCLK rising edge

tLRSU

DACLRC/ADCLRC hold

tLRH

time from BCLK rising edge

DIN1/2/3/4 set-up time to

tDS

BCLK rising edge

DIN1/2/3/4 hold time from

tDH

BCLK rising edge

DOUT propagation delay

tDD

from BCLK falling edge

Table 3 Digital Audio Data Timing – Slave Mode

TEST CONDITIONS

MIN

TYP

MAX

UNIT

50

ns

20

ns

20

ns

10

ns

10

ns

10

ns

10

ns

0

10

ns

Note: ADCLRC and DACLRC should be synchronous with MCLK, although the WM8770 interface is tolerant of phase

variations or jitter on these signals.

w

PD Rev 4.1 June 2005

11

Share Link: