CS4201 View Datasheet(PDF) - Cirrus Logic

Part Name

Description

MFG CO.

CS4201

CrystalClear® Audio Codec ’97 with Headphone Amplifier

Cirrus Logic 

CS4201

7. EXCLUSIVE FUNCTIONS

Some of the digital pins on the CS4201 have mul-

tiplexed functionality. These functions are mutual-

ly exclusive and cannot be requested at the same

time. The following pairs of functions are mutually

exclusive:

• GPIO and Serial Data Port (GPIO0 pin is

shared with LRCLK pin and GPIO1 pin is

shared with SDOUT pin)

• EAPD and Serial Data Port Serial Clock

(EAPD pin is shared with SCLK pin)

• S/PDIF and Second Serial Data Port (SPDO pin

is shared with SDO2 pin)

There is no priority assigned to the exclusive func-

tions. A function currently in use must be disabled

or powered down before the corresponding exclu-

sive function can be enabled. The following control

bits for these functions will behave differently than

normal bits: the EAPD bit in the Powerdown Con-

trol/Status Register (Index 26h), the PRA bit in the

Extended Modem Status/Control Register (Index

3Eh), the SPEN bit in the S/PDIF Control Register

(Index 68h), and the SDEN, SDO2, and SDSC bits

in the Serial Port Control Register (Index 6Ah).

These bits can become read-only bits if they control

a feature that is currently unavailable because the

corresponding exclusive feature is already in use,

or the corresponding master control for this feature

is not set.

44

DS483PP3

Share Link: