UDA1342 PHILIPS [NXP Semiconductors], UDA1342 Datasheet - Page 22

• Manufacturer Part Number: UDA1342
• Description: Audio CODEC
• Manufacturer: PHILIPS [NXP Semiconductors]

Philips Semiconductors
9.1
A 1-bit value to initialize the L3-bus and I
except the system register (00H) with default settings by
setting bit RST = 1.
Table 20 Reset bit
9.2
A 1-bit value to enable the quick mode change of the ADC.
The soft mode change works only between modes if
bit AM2 = 1.
Table 21 Quick mode switch
9.3
A 1-bit value to disable the DC filter of the ADC mixer. This
DC filter is in front of the mixer to prevent clipping inside
the mixer due to DC signals.
Table 22 Mixer DC filtering
9.4
A 1-bit value to enable the DC filter of the ADC output. This
DC filter is inside the decimation filter.
Table 23 DC-filtering
2000 Mar 29
Audio CODEC
MDC
RST
QS
DC
Reset
Quick mode switch
Bypass mixer DC filter
DC filter
0
1
0
1
0
1
0
1
no reset
reset registers to default
soft mode change
quick mode change
enable mixer DC filtering
disable mixer DC filtering
disable output DC filtering
enable output DC filtering
FUNCTION
FUNCTION
FUNCTION
FUNCTION
2
C-bus registers
22
9.5
A 3-bit value to select the mode of the ADC.
Table 24 ADC mode
9.6
A 1-bit value to control the ADC polarity.
Table 25 Polarity control of the ADC
9.7
A 2-bit value to select the external clock frequency.
Table 26 System clock frequency settings
AM2 AM1 AM0
0
0
0
0
1
1
1
1
SC1
0
0
1
1
ADC mode
ADC polarity
System clock frequency
PAD
0
0
1
1
0
0
1
1
0
1
SC0
0
1
0
1
0
1
0
1
0
1
0
1
ADC power-off
input 1 select (input 2 off)
input 2 select (input 1 off)
not used
channel swap and signal inversion
input 1 select (double differential
mode)
input 2 select (double differential
mode)
mixing mode
non-inverting
inverting
256f
384f
512f
768f
s
s
s
s
FUNCTION
FUNCTION
FUNCTION
Preliminary specification
UDA1342TS