MSM7503 Просмотр технического описания (PDF) - Oki Electric Industry

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MSM7503

Multi-Function PCM CODEC

Oki Electric Industry 

¡ Semiconductor

MSM7503

SYNC

Synchronous signal (8 kHz) output.

This synchronous signal is generated by dividing the oscillator output of 8.192 MHz, applying

the frame synchronous bit included in the line signal as a reference phase. This signal also sent

to the tone generator and the CODEC inside the device. All timing signals of the CODEC are

synchronized by this signal.

CLK1

64 kHz CLK signal output synchronized to the SYNC signal output.

This signal is connected to the CODEC inside the device and is used as a bit clock for receiving

and sending the PCM I/O data from and to the ping-pong transmission interface. When an

external signal is input to the BHW pin, or when the FHW pin outputs signals for the external

circuit, the timing should be set by the CLK1 signal. This signal is always output in the power ON

mode.

CLK2

16 kHz CLK signal output synchronized to the SYNC signal output.

This signal can be used for the input or output of the control signal (BD input or FD output) of

16 kbps. This signal is always output in the power ON mode.

CLK3

CLK signal output of 256 kHz synchronized to the SYNC signal.

This signal can be used when the control signal of 16 kHz is input or output from or to the external

device by the start-stop synchronization. This signal is always output in the power ON mode.

CLC

Control signal input for phase-inverting the 256 kHz CLK signal which is output form the CLK3

pin.

If the reference phase is set by setting CLC to "0", the CLK signal of 256 kHz is phase-inverted

against the reference phase by setting CLC to "1".

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