UDA1342 PHILIPS [NXP Semiconductors], UDA1342 Datasheet - Page 12

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

Philips Semiconductors
8.11
The UDA1342TS operates with sample frequencies from
16 to 110 kHz. This range holds for the CODEC as a
whole. The DAC part can be configured in the L3-bus and
I
speed (e.g. f
of the features can be used.
Some examples of the input oversampling rate settings
are shown in Table 4.
Table 4
8.12
The UDA1342TS has an internal Power-on reset circuit
(see Fig.7) which resets the test control block. All the
digital sound processing features and the system
controlling features are set to their default setting in the
L3-bus and I
The reset time (see Fig.8) is determined by an external
capacitor which is connected between pin V
The reset time should be at least 1 s for V
When V
again for V
During the reset time the system clock should be running.
2000 Mar 29
2
12.288 MHz (256
22.5792 MHz (512
33.8688 MHz (768
C-bus mode to accept 2 times and even 4 times the data
Audio CODEC
Sampling speed
Power-on reset
SYSTEM CLOCK
DDA(DAC)
Examples of the input oversampling rate settings
ref
s
2
C-bus mode.
< 0.75 V.
is 96 or 192 kHz), but in these modes not all
is switched off, the device will be reset
48 kHz)
44.1 kHz)
44.1 kHz)
FREQUENCY
SETTING
SYSTEM
CLOCK
256f
512f
256f
768f
384f
ref
ref
s
s
s
s
s
and ground.
< 1.25 V.
FREQUENCY
SAMPLING
176.4
176.4
(kHz)
44.1
88.2
44.1
88.2
192
48
96
12
Important: in the double speed mode an input signal of
0 dB is allowed, but in the quad speed mode the input
signal must be limited to 6 dB to prevent the system from
clipping.
handbook, halfpage
single speed
double speed
quad speed
single speed
single speed
double speed
single speed
single speed
double speed
INPUT OVER-
SAMPLING
3.0 V
RATE
V DDA(DAC)
Fig.7 Power-on reset circuit.
C1
10 F
V ref
25
28
all
only master volume and mute
no features
all
all
only master volume and mute
all
all
only master volume and mute
FEATURES SUPPORTED
8 k
8 k
UDA1342TS
Preliminary specification
UDA1342TS
CIRCUIT
RESET
MGU001