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HT98R068-1 Two-way Radio OTP MCU
HT98R068-1 Two-way Radio OTP MCU
D/N: A
N
0305E
Introduction
The Holtek HT98R068-1 is an ASSP OTP (One-Time Programmable) MCU specifically
designed for two-way radio communication applications. The internal in-band tone/sub-tone
processor supports functions, such as emphasis/de-emphasis, CTCSS/DCS encoder/
decoder, DTMF encoder/decoder, scramble/descramble, VOX…etc., transmitted to the
other port by a radio frequency carrier. Using the
code to mark the product extended series,
but it’s still avalible in this text such as the HT98R068-1.
Operating Principles
Sub-tone
CTCSS encode/decode
DCS encode/decode
In-band tone processor
DTMF encode/decode
Selective call tone (EEA standard)
In band tone(user define)
Other signals
DCS turn-off tone
Advanced audio processor
Scrambling
Companding
Emphasis/De-emphasis
Digital filter: 12.5k / 25k / HPF(300) filter
In-band signal level adjustment function
Voice Control(VOX)
MIC AGC
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