Sindoh M612 - View and Important Functins of FAX

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View and Important Fuctions of FAX
Block Diagram
Components and Basic Functions
FAX card(SSF336) has the following structures as the above figure.
The lines connected to FAX card are PSTN(Public Switched Telephone Network) and PABX
(Private Automatic Branch Exchange).
The important functions are as the following.
 Important Fuctions of HSD(CX95110)
 The default modem speed is max 33600bps and can automatically be reduced to any
proper speed when the speed needs to be limited.
 Perform SPI communication to talk with controllers.
 Digital signals converted from DAA are delivered to HSD through DIB, and after HSD
has processed the digital signals, it sends the signals to MFP controller through SPI
communicaton and process the images.
 Generating PWM(Pulse Width Modulation) signal to drive Speaker Driver.