User's Manual

FLC-BTM403 Series User Manual
Flaircomm Technologies Confidential
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RF-IN High impedance
Table 4: Pin Status on Reset
Note: Pull-up (PU) and pull-down (PD) default to weak values unless specified otherwise.
4.3 Digital Audio Interfaces
The module has offered PCM digital audio interface.
PCM is a standard method used to digitize audio (particularly voice) for transmission over digital
communication channels. Through its PCM interface, the module has hardware support for continual
transmission and reception of PCM data, thus reducing processor overhead for applications. The
module offers a bi-directional digital audio interface that routes directly into the baseband layer of
the on-chip firmware. It does not pass through the HCI protocol layer.
Hardware on the module allows the data to be sent to and received from a SCO connection. Up to
three SCO connections can be supported by the PCM interface at any one time.
The module can operate as the PCM interface master generating an output clock of 128, 256 or
512kHz. When configured as PCM interface slave, it can operate with an input clock up to 2048kHz.
The module is compatible with a variety of clock formats, including Long Frame Sync, Short Frame
Sync and GCI timing environments.
It supports 13-bit or 16-bit linear, 8-bit µ-law or A-law companded sample formats at 8k samples/s
and can receive and transmit on any selection of three of the first four slots following PCM_SYNC.
The module interfaces directly to PCM audio devices including the following:
z Qualcomm MSM 3000 series and MSM 5000 series CDMA baseband devices
z OKI MSM7705 four channels A-law and µ-law CODEC
z Motorola MC145481 8 -bit A-law and µ-law CODEC
z Motorola MC145483 13 -bit linear CODEC
z STW 5093 and 5094 14 -bit linear CODECs
The module is also compatible with the Motorola SSI™ interface.
4.3.1 PCM Interface Master/Slave
When PCM is configured as a master, the module generates PCM_CLK and PCM_SYNC.