
Rev: 13 September 2005 
Class 2 Bluetooth module - F2M03C2 
Datasheet
6.4 PCM 
Pulse Code Modulation (PCM) is the standard method used to digitise human voice patterns for 
transmission over digital communication channels. Through its PCM interface, F2M03 has hardware 
support for continual transmission and reception of PCM data, thus reducing processor overhead for 
wireless headset and other audio applications. F2M03 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 F2M03 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
(1)
F2M03 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. F2M03 is compatible 
with a variety of clock formats, including Long Frame Sync, Short Frame Sync and GCI timing 
environments. 
It supports 13 or 16-bit linear, 8-bit p-law or A-law companded sample formats at 8ksamples/s and can 
receive and transmit on any selection of three of the first four slots following PCM_SYNC. The PCM 
configuration options are enabled by firmware settings (contact Free2move). 
F2M03 interfaces directly to PCM audio devices includes the following: 
Qualcomm MSM 3000 series and MSM 5000 series CDMA baseband devices 
OKI MSM7705 four channel A-law and p-law CODEC 
Motorola MC145481 8-bit A-law and μ-law CODEC 
Motorola MC145483 13-bit linear CODEC 
F2M03 is also compatible with the Motorola SSITM interface 
(1)
 Subject to firmware support, contact Free2move for current status. 
 2003 Free2move AB
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