MSM7570L-01 Ver la hoja de datos (PDF) - Oki Electric Industry

Número de pieza

componentes Descripción

Lista de partido

MSM7570L-01

Multi-Function ADPCM CODEC

Oki Electric Industry 

¡ Semiconductor

MSM7570L-01/02

XSYNC

Transmit PCM and ADPCM data 8 kHz synchronous signal input.

Synchronize this signal with BCLK signal. XSYNC is used to indicate the MSB of the transmit

serial PCM and ADPCM data stream.

Be sure to input the XSYNC signal because it is also used as the input of the timing generator.

RSYNC

Receive PCM and ADPCM data synchronous signal input.

Synchronize this signal with BCLK signal. RSYNC is used to indicate the MSB of the receive

serial PCM and ADPCM data stream.

VOXO

Transmit VOX function signal output.

VOX function voice recognizes the presence or absence of the transmit voice signal by detecting

the signal energy. “1” and “0” levels set on this pin correspond to the presence and the absence

of voice, respectively. This result appears at the register data CR7-B7. The signal energy detect

threshold is set by the control register data CR6-B6, B5.

VOXI

Signal input for receive VOX function.

A “1” level at VOXI indicates the presence of a voice signal. The decoder block processes normal

receive signal, and the voice signal appears at the analog output pins . The “0” level indicates

the absence of a voice signal. Background noise generated in this device is transferred to the

analog output pins. The background noise amplitude is set by the control register CR6. Because

this signal is ORed with the register data CR6-B3, set the control register data CR6-B3 to digital

“0”.

7/26

Share Link: