16

DS641F4

CS8421

CS8421

VD

VL

Serial

Audio

Source

ILRCK

ISCLK

SDIN

BYPASS

+2.5 V

+3.3 V or +5.0 V

0.1 μF0.1 μF

Serial

Audio

Input

Device

OLRCK

OSCLK

SDOUT

XTI

XTO

RST

SRC_UNLOCK

SAOF

TDM_IN

Hardware Control

Settings

Crystal /Clock

Source

GND

SAIF

MS_SEL

GND

MCLK_OUT

To external

hardware

47 kΩ

*

**

Figure 6. Typical Connection Diagram, Master and Slave Modes

* The connection (VL or GND) and value of these three resistors determines the mode of operation for the input

and output serial ports as described in Table 1 Serial Audio Port Master/Slave and Clock Ratio Select Start-Up

Options (MS_SEL), and Table 2, “Serial Audio Input Port Start-Up Options (SAIF),” on page 19 and Table 3,

“Serial Audio Output Port Start-Up Options (SAOF),” on page 19.

** MCLK_OUT pin should be pulled high through a 47 kΩ resistor if an MCLK output is not needed.