Sierra Wireless Q2687 Manuel D’Utilisation
Wireless CPU Quik Q2687
Interfaces
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prior written agreement.
WA_ENG_Q2687_PTS_001-002
September 11, 2006
FLASH-LED state is high during the RESET time and undefined during the software
initialization time. During software initialization time, for 2 seconds max after RESET
cancellation, the FLASH-LED signal is toggling and does not provide Wireless CPU
initialization time. During software initialization time, for 2 seconds max after RESET
cancellation, the FLASH-LED signal is toggling and does not provide Wireless CPU
status. After the 2s period, the FLASH-LED provides the true status of the Wireless
CPU.
CPU.
Electrical characteristics of the signal
Parameter
Condition
Minimum Typ Maximum
Unit
V
OL
0.4
V
I
OUT
8
mA
3.24
Digital Audio Interface (PCM)
Digital audio interface (PCM) mode allows connectivity with audio standard
peripherals. It may be used, for example, to connect an external audio codec.
peripherals. It may be used, for example, to connect an external audio codec.
The programmability of this mode allows to address a large range of audio
peripherals.
peripherals.
PCM features:
• 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 768KHz only
• 16 bits data word MSB first only
• Linear Law only (no compression law)
• Long Frame Synchronization only
• Push-pull configuration on PCM-OUT and PCM-IN
• Master mode only with 6 slots by frame, user only on slot 0
• Bit rate single clock mode at 768KHz only
• 16 bits data word MSB first only
• Linear Law only (no compression law)
• Long Frame Synchronization only
• Push-pull configuration on PCM-OUT and PCM-IN
The digital audio interface configuration cannot differ from the above specified
features.
features.
3.24.1 Description
The PCM interface consists of 4 wires:
• PCM-SYNC (output): The frame synchronization signal delivers an 8KHz
frequency pulse that synchronizes the frame data in and the frame data out.
• PCM-CLK (output): The frame bit clock signal controls data transfer with the
audio peripheral.
• PCM-OUT (output): The frame "data out" relies on the selected configuration
mode.
• PCM-IN (input): The frame "data in" relies on the selected configuration mode.