Digital Audio Interface (Pcm); Pcm Pin Descriptions; Audio Pins - Sierra Wireless AirPrime SL808 Series Product Technical Specification & Customer Design Manuallines

Product Technical Specification & Customer Design Guidelines
Table 4-32: Audio pins
Pin Name I/O type
64 PCM_SYNC
65 PCM_DOUT
66 PCM_DIN
67 PCM_CLK
62 Proprietary and Confidential - Specifications subject to change

4.11 Digital audio interface (PCM)

The Digital Audio Interface (PCM) interface allows connectivity with standard
audio peripherals. It can be used, for example, to connect an external audio
codec. Table 4-31 describes the purpose and features of this interface.
Table 4-31: PCM audio interface features
Feature
Implementation
•
Power
•
•
•
•
Features
•
•
•
•
The programmability of this interface allows addressing a large range of audio
peripherals.

4.11.1 PCM pin descriptions

Table 4-32 describes the digital audio (PCM) interface pins.
See Digital I/O electrical information
and reset state definitions.
Note: Note that the digital audio interface configuration cannot differ from this specifi-
cation.
a
Reset state
PCM synchronization bit
PCM output
PCM input
PCM clock
Details
Primary PCM supported to interface with external codec
1.8 V (use VREF_1V8 as logic reference)
IOM-2 compatible device on physical level
Master mode only with 6 slots by frame (user only on slot 0)
Bit rate single clock mode at 768 kHz only
16 bits data word MSB first only
Linear Law only (no compression law)
Long Frame Synchronization only
Push-pull configuration on PCM_DOUT and PCM_DIN
on page 39 for 1V8 voltage characteristics
Description Notes
Delivers 8 kHz frequency
•
pulse that synchronizes
frame data in/out.
Frame 'data out' relies on
•
selected configuration mode.
Frame 'data in' relies on
•
selected configuration mode.
2 MHz for primary PCM
•
mode. Controls data transfer
with the audio peripheral.
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