FRS

There are 3 different product codes in Conwise FRS (Family Radio Service) product line. They are all implemented in DSP technology for the purpose of a better signal processing performance, but also cost effective if compared with the discrete solution.

Both CW6670 and CW6671 are all of standard code functions and can be changed into many different variations through external EEPROM setting. However, the former is positioned to be at the richer functions than the latter. Meanwhile, CW6675 is the newest one with the regulators built in and offers 16KB OTP for the user product differentiation. Please take a look at the FRS comparison table to overview what their differences are.

Item	CW6670	CW6671	CW6675
MCU ROM	32KB ROM	32KB ROM	16KB OTP
MCU RAM	Internal : 256	Internal : 256	Internal : 256 External : 256
GPIO	16	16	32
LCD	16x4	16x4	23x8
Crystal Input	12.288 MHz	12.288 MHz	32.768 KHz
Main Clock	4.096 MHz	4.096 MHz	Up to 24.576 MHz
Speak Driver	4 Ohm	4 Ohm	32 Ohm
Built-in Regulators	No	No	Yes
Band Pass Filter	Yes	Yes	Yes
CTCSS Codes	48	38	48
ALC	Yes	Yes	Yes
VOX	Yes	Yes	Yes
Pre/De-emphasis	No	No	Yes
Scramble	Yes	No	Yes
Vibration	Yes	No	Yes
Weather Channel	Yes	No	Yes
FM Radio	Yes	No	Yes
Remote Monitor	Yes	No	Yes
Baby Monitor	Yes	No	Yes
Group	Yes	No	Yes
Squelch	Yes	No	Yes