CS42325
4.6
Device Control
In Software Mode, all functions and features may be controlled either by two-wire I²C or SPI Software Mode
interface. In Hardware Mode, a limited feature set may be controlled via hardware control pins.
4.6.1
Hardware Mode
A limited feature-set is available when the CS42325 powers up in Hardware Mode (see “Recommended
Power-Up Sequence, Hardware Mode” on page 38) and may be controlled via hardware control pins.
Table 9 shows a list of functions/features, the default configuration and the associated hardware control
available.
Hardware Mode Feature Summary
Feature/Function
Default Configuration
Powered Up
Hardware Control
-
-
-
-
-
Power Control
ADC
DAC1
DAC2
Powered Up
Powered Up
SP_ERROR
Auto Detect
Enabled; Active low, open drain
Enabled
(256x/128xFs, 512x/256xFs only)
“M0” and “M1”, pins 1 and 2
Serial Port Master/Slave and Speed Mode
Async / Sync Mode
(Selectable)
Synchronous only
(Selectable)
(see page 29)
-
“MDIV” pin 3
(see page 30)
MCLK Divide
“DIF” pin 5
(see page 32)
Serial Port Interface Format
Serial Port 1
Serial Port 2
(Selectable)
Freeze Bit Settings
ADC Volume & Gain
Disabled
Enabled
Disabled
Disabled
Disabled
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
Soft Ramp
Zero Cross
Mute
Invert
Volume
0 dB
Enabled
Continuous DC Subtraction
AIN1
ADC High-Pass Filter
ADC High-Pass Filter Freeze
AIN Input Select to ADC
(SDOUT source)
Enabled
Disabled
Disabled
Disabled
DAC1 & DAC2 Volume & Gain
Soft Ramp
Zero Cross
Mute
Invert
Mixer
Volume
Disabled (‘00’)
0 dB
DAC1 & DAC2 De-Emphasis
AOUT1x
AOUT2x
Disabled
source
source
source
Output of DAC1
Output of DAC2
AIN1x
AOUT3x/HPx
MUTE pin 4
(see page 37)
AOUTxx
MUTE
(Selectable)
Table 9. Hardware Mode Feature Summary
40
DS838A2
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