HBH2X1M

Bluetooth V2.0 + EDR Class 2 Module

Data Book

www.hanamicron.co.kr

14 page / 16 pages

3.4 PCM

Pulse Code Modulation (PCM) is a standard method used to digitize audio

(particularly voice) patterns for transmission over digital communication

channels. Through its PCM interface, this module has hardware support for

continual transmission and reception of PCM data, so reducing processor

overhead for wireless headset applications. This module offers a bi-directional

digital audio interface that route directly into the baseband layer of the on-chip

firmware. It dose not pass through the HCI protocol layer.

Hardware allows the data to be sent to and received from a SCO connection

This module interfaces directly to PCM audio devices including the following :

- Qualcomm MSM 3000 series and MSM 5000 series CDMA baseband devices

- OKI MSM7705 for channel A-law and u-law CODEC

- Motorola MC145481 8-bit A-law and u-law CODEC

- Motorola MC145483 13-bit linear CODEC

- STW 5093 and 5094 14-bit linear CODECs

3.4.1 PCM Configuration

The PCM configuration is set using two PS keys, PSKEY_PCM_CONFIG32 and

PSKEY_PCM_LOW_JITTER_CONFIG. The default for long frame sync and interface master generating

256KHz PCM_CLK with no tristating of PCM_OUT.

Parameter

Possible value

Mode

Slave, Master

Clock Rate

Master Mode : 128, 256, 512KHz

Slave Mode : up to 2048KHz

Sync Formats

Long frame sync, Short frame sync

Data Formats

13 or 16bit linear, 8 - bit A - law to u - law