Usb Interface - Panasonic KX-TG9581B Service Manual

KX-TG9581B/KX-TG9582B/KX-TGA950B
4.2.4.2. Receiver Block
The signal of 1900 MHz band (1920 MHz ~ 1930 MHz) which is input from antenna is input to IC601 as shown in Block Diagram
(Base Unit) (P.8).
In IC601, the signal of 1900 MHz band is downconverted to 864 kHz signal and demodulated,GAP (Generic Access Profile)
standard DECT frames. It passes through the decoding section burst switch controller where it separates out the frame
information and performs de-encryption and de-scrambling as required. It then goes to the DSP section where it is turned back
into analog audio. This is amplified by the analog front end, and goes to the TEL LINE 1 [IC701, TEL LINE 2] Interface.
4.2.5.

USB Interface

• IC401 includes a USB 2.0 full-speed function controller. USB transceiver, oscillator, one-time programmable ROM, and
asynchronousserial data bus (UART) with full modem control signal. USB and UART is bridged by IC401
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