Specifications

PLS63-W Hardware Interface Overview
2.1 Application Interface
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to 8kHz in a narrowband call. Therefore, the PCM sample rate is independent of the audio
bandwidth of the call.
The PCM interface has the following characteristics:
• Master mode
• Long frame synchronization
• 16kHz/8kHz sample rate
• 512 kHz bit clock at 16kHz sample rate
• 256 kHz bit clock at 8kHz sample rate
Table 3 lists the available PCM interface signals.
Note: PCM data is always formatted as 16-bit uncompressed two’s complement. Also, all
PCM data and frame synchronization signals are written to the PCM bus on the rising clock
edge and read on the falling edge.
2.1.6.2 Inter-IC Sound Interface (TBD)
The I
2
S Interface is a standardized bidirectio zonal I
2
S based digital audio interface for trans-
mission of mono voice signals for telephony services.
The I
2
S properties and capabilities comply with the requirements lay out in the Phillips I
2
S
Bus Specifications, revised June 5, 1996.
The I
2
S interface has the following characteristics:
• Bit clock mode: Master
• Sampling rate: 8kHz (narrowband), 16kHz (wideband)
• 256kHz bit clock at 8kHz sample rate
• 512kHz bit clock at 16kHz sample rate
Table 3: Overview of PCM pin functions
Signal name Signal direction
master
Description
DOUT O PCM Data from PLS63-W to external codec.
DIN I PCM Data from external codec to PLS63-W.
FSC O Frame synchronization signal to external codec.
BCLK O Bit clock to external codec. Note: If the BCLK2 signal is
permanently
provided (AT^SAIC parameter <clk_mode> = 0), the
module will no
longer enter its power save (SLEEP) state.
MCLK - Audio master clock. Be synchronous to BCLK to use in
external codec. Can be switched on and off.