msm7586-01 Oki Semiconductor, msm7586-01 Datasheet - Page 15

• Manufacturer Part Number: msm7586-01
• Description: Shift Qpsk Modem/adpcm Codec
• Manufacturer: Oki Semiconductor

¡ Semiconductor
MSM7586-01/03
PCMSO
Transmit PCM data output.
This PCM output signal is output from MSB synchronous with the rising edge of BCLK and
XSYNC.
PCMSI
Transmit PCM data input.
This signal is converted to the ADPCM data. The PCM signal is shifted on the falling edge of
BCLK. Normally, this pin is connected to PCMSO.
PCMRO
Receive PCM data output.
The PCM signal is the output signal after ADPCM decoder processing. This signal is serially
output from the MSB synchronous with the rising edge of BCLK and RSYNC.
PCMRI
Receive PCM data input.
The PCM input signal is shifted on the falling edge of BCLK and input from MSB. Normally, this
pin is connected to PCMRO.
IS
Transmit ADPCM signal output.
This signal is the output signal after ADPCM encoding, and is serially output from MSB
synchronous with the rising edge of BCLK and XSYNC. This pin is an open drain output which
remains in a high impedence state during power-down, and requires a pull-up resistor.
IR
Receive ADPCM signal input.
Input data is shifted serially from MSB on the falling edge of BCLK synchronous with RSYNC.
BCLK
Shift clock input for the PCM data (PCMSO, PCMSI, PCMRO, PCMRI) and the ADPCM data(IS,
IR) .
The frequency ranges from 64 kHz to 2048 kHz.
XSYNC
Transmit PCM and ADPCM data 8 kHz synchronous signal input.
This signal should be synchronous with BCLK. XSYNC is used for indicating MSB of the transmit
serial PCM and ADPCM data stream.
RSYNC
Receive PCM and ADPCM data 8 kHz synchronous signal input.
This signal should be synchronous with BCLK signal. RSYNC is used for indicating MSB of the
receive serial PCM and ADPCM data stream.
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