MSM7580 데이터 시트보기 (PDF) - Oki Electric Industry

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MSM7580

ITU-T G.721 ADPCM TRANSCODER

Oki Electric Industry 

¡ Semiconductor

PAD/MUTE Processing Timing

SYNCA

BCLKA

SIA

MSB

LSB

78.125ms

Internal 12dBPAD Processing Timing

121.09ms

Internal MUTE Processing Timing

78.125ms

78.125ms

MSM7580

PAD Mode; MUTE1 and MUTE 2 Timings PAD/MUTE="H"

MUTE1, 2

SYNCP

BCLKP

SOP

MSB

LSB

0dB transmit data

12dB loss transmit data

0dB transmit data

MUTE Mode; MUTE1 and MUTE 2 Timings PAD/MUTE="L"

MUTE1, 2

SYNCP

BCLKP

SOP

MSB

LSB

0dB transmit data

MUTE (idle channel state)

0dB transmit data

 As mentioned above, PAD and MUTE processings are carried out according to the rising edge

of SYNCA.

Even if BCLK is not 128 kHz, these processings are performed in the absolute time counted from

the rising edge of SYNCA.

 Therefore, MUTE1 and MUTE 2 pins must be controlled so as to cover there processsings.

10/17

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