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UDA1384H Datasheet PDF : 55 Pages
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Philips Semiconductors
UDA1384
Multichannel audio coder-decoder
Table 4:
Type
DIS
DO
DS
IIC
Pin types …continued
Description
digital Schmitt-triggered input
digital output
digital supply
input and open-drain output for I2C-bus
8. Functional description
8.1 System clock
The UDA1384 operates in slave mode only; this means that in all applications the system
must provide either the system clock (the bit clock for the voice ADC) or the word clock.
The audio ADC part, the voice ADC part and the DAC part can operate at different
sampling frequencies (DAC-WS and ADC-WS modes) as well as a common frequency
(SYSCLK, WSDA and DSD modes).
The voice ADC part supports a sampling frequency up to 50 kHz and the audio ADC
supports a sampling frequency up to 100 kHz. The DAC sampling frequency range is
extended up to 200 kHz with the range above 100 kHz being supported through 192 kHz
sampling mode, which halves the oversampling ratio of SYSCLK and internal clocks.
The mode of operation of the audio and voice channels can be set via the L3-bus or
I2C-bus microcontroller interface and are summarized in Table 5 and Table 6.
When applied, the system clock must be locked in frequency to the corresponding digital
interface clocks.
The voice ADC part can either receive or generate the WSV signal as shown in Table 6.
Table 5: Audio ADC and DAC operating clock mode
Mode
Audio ADC
Audio DAC
Clock Frequency
Clock Frequency
SYSCLK
SYSCLK 256fs, 384fs, 512fs or 768fs
SYSCLK 256fs, 384fs, 512fs or 768fs
SYSCLK 128fs, 192fs, 256fs or 384fs;
192 kHz sampling mode
DAC-WS
ADC-WS
SYSCLK 256fs, 384fs, 512fs or 768fs
WSAD 1fs
WSDA
SYSCLK
SYSCLK
1fs
256fs, 384fs, 512fs or 768fs
128fs, 192fs, 256fs or 384fs;
192 kHz sampling mode
WSDA
DSD
WSDA 1fs
SYSCLK 44.1 kHz × 512
WSDA 1fs
SYSCLK 44.1 kHz × 512
9397 750 14366
Product data sheet
Table 6:
Mode
WSV-in
WSV-out
Voice ADC operating clock mode
Voice ADC
Bit clock frequency (BCKV)
input: 32fs, 64fs, 128fs or 256fs
input: 32fs, 64fs, 128fs or 256fs
Rev. 02 — 17 January 2005
Word select (WSV)
input
output
© Koninklijke Philips Electronics N.V. 2005. All rights reserved.
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