Block Diagram - Holtek HT98R068 Manual

Block Diagram

Hardware Block Function Description

Audio processor unit: A signal processing unit, responsible for the audio and signal
processing.

Input unit: The input source option, including MIC OPA, multiplexer, PGA and
multiplexer that provide selectable audio and modulation signal input, such as MICO,
AUX, BEEP1 and DEMI.

Output unit–MOD/SMOD: The signal output port includes MODO for the baseband
signal output and SMODO for the sub-tone signal output.

Output unit–Audio: The audio output port with selectable DAC1, BEEP0 multiplexed
outputs.

MCU unit: The MCU control unit is used to control the user program code for I/O control,
flow control etc.
HT98R068 Two-way Radio MCU
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