uda1334bt NXP Semiconductors, uda1334bt Datasheet - Page 9

• Manufacturer Part Number: uda1334bt
• Description: Low Power Audio Dac
• Manufacturer: NXP Semiconductors

Philips Semiconductors
8.6
The features of the UDA1334BT can be set by control
pins SFOR1, SFOR0, MUTE, DEEM and PCS.
8.6.1
The digital audio interface formats (see Fig.5) can be
selected via the pins SFOR1 and SFOR0 as shown in
Table 4.
Table 4 Data format selection
8.6.2
The output signal can be soft muted by setting pin MUTE
to HIGH level as shown in Table 5.
Table 5 Mute control
8.6.3
De-emphasis can be switched on for f
setting pin DEEM at HIGH level. The function description
of pin DEEM is given in Table 6.
Table 6 De-emphasis control
Remark: the de-emphasis function in only supported in
the normal operating mode, not in the low sampling
frequency mode.
2002 May 22
Low power audio DAC
SFOR1
MUTE
DEEM
HIGH
HIGH
HIGH
HIGH
LOW
LOW
LOW
LOW
Feature settings
D
M
D
IGITAL INTERFACE FORMAT SELECT
E
UTE CONTROL
-
EMPHASIS CONTROL
mute off
mute on
de-emphasis off
de-emphasis on
SFOR0
HIGH
HIGH
LOW
LOW
I
LSB-justified 16 bits input
LSB-justified 20 bits input
LSB-justified 24 bits input
FUNCTION
FUNCTION
2
S-bus input
INPUT FORMAT
s
= 44.1 kHz by
9
8.6.4
Pin PCS is a 3-level pin and is used to set the mode of the
UDA1334BT. The definition is given in Table 7.
Table 7 PCS function definition
The low sampling frequency mode is required to have a
higher oversampling rate in the noise shaper in order to
improve the signal-to-noise ratio. In this mode the
oversampling ratio of the noise shaper will be 128f
of 64f
HIGH
LOW
PCS
MID
s
.
P
SELECT
OWER CONTROL AND SAMPLING FREQUENCY
normal operating mode
low sampling frequency mode
Power-down or Sleep mode
FUNCTION
UDA1334BT
Product specification
s
instead