CS8421 datasheet(11/36 Pages) CIRRUS

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CS8421

DS641PP1

CS8421

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

RST

SRC_UNLOCK

SAOF

TDM_IN

Hardware Control

Settings

GND

SAIF

MS_SEL

GND

1 k

Ω *

Figure 6. Typical Connection Diagram, No External Master Clock

* When no external master clock is supplied to the part, both input and output must be set to salve mode

for the part to operate properly. This is done by connecting the MS_SEL pin to ground through a resis-

tance of 0

Ω to 1 kΩ ± 1% as stated in Table 1, “Serial Audio Port Master/Slave and Clock Ratio Select

Startup Options (MS_SEL),” on page 13

** The connection (VL or GND) and value of these two 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 Startup Options (MS_SEL)", Table 2, “Serial Audio Input Port Startup Options (SAIF)", and

Table 3, “Serial Audio Output Port Startup Options (SAOF)", all on page 13.

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