User's Manual

晶訊科技股份有限公司 8F, No. 150, Jian Yi Road, Zhonghe District,
CC&C Technologies, Inc. New Taipei City, Taiwan 235, R.O.C.
Tel: [phone] Fax: [phone]
Version: 1.6
9
PCM Interface Characteristics
The CM-8723BU supports a PCM digital audio interface that is used for transmitting digital audio/voice
data to/from the Audio Codes. Features are supported as below:
z Supports Master and Slave mode
z Programmable long/short Frame Sync
z Supports 8-bit A-law/ -law, and 13/16-bit linear PCM formats
z Supports sign-extension and zero-padding for 8-bit and 13-bit samples
z Supports padding of Audio Gain to 13-bit samples
z PCM Master Clock Output: 64, 128, 256, or 512kHz
z Supports SCO/ESCO link
PCM Format
FrameSync is the synchronizing function used to control the transfer of DAC_Data and ADC_Data. A Long
FrameSync indicates the start of ADC_Data at the rising edge of FrameSync, and a Short FrameSync
indicates the start of ADC_Data at the falling edge of FrameSync.