uda1334ts NXP Semiconductors, uda1334ts Datasheet - Page 9

• Manufacturer Part Number: uda1334ts
• Description: Low Power Audio Dac
• Manufacturer: NXP Semiconductors

Philips Semiconductors
8.6
The features of the UDA1334TS 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.
The BCK frequency for the digital audio interface can be
maximum 64 times the WS frequency: f
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
When the output signal is fully muted (pin MUTE at
HIGH level), a silence switch inside the FSDAC is
activated. In this way a very high signal-to-noise ratio can
be achieved in case the output is muted.
2000 Oct 25
Low power audio DAC
SFOR1
MUTE
HIGH
HIGH
HIGH
LOW
LOW
LOW
Feature settings
D
M
IGITAL INTERFACE FORMAT SELECT
UTE CONTROL
mute off
mute on
SFOR0
HIGH
HIGH
LOW
LOW
I
LSB-justified 16 bits input
LSB-justified 20 bits input
LSB-justified 24 bits input
FUNCTION
2
S-bus input
INPUT FORMAT
BCK
64f
WS
.
9
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
8.6.4
Pin PCS is a 3-level pin and is used to set the mode of the
UDA1334TS. 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
DEEM
HIGH
HIGH
LOW
LOW
PCS
MID
s
.
D
P
SELECT
OWER CONTROL AND SAMPLING FREQUENCY
E
-
EMPHASIS CONTROL
de-emphasis off
de-emphasis on
normal operating mode
low sampling frequency mode
Power-down or Sleep mode
FUNCTION
FUNCTION
Product specification
UDA1334TS
s
= 44.1 kHz by
s
instead