CTCSS block
•Operating voltage : 2.7V∼5.5V
•Microphone amplifier (can be used as general OP Amp)
•Microphone mute function
•RX input OP
•Audio BPF (300Hz ~ 3400Hz)
•Sub-audio LPF (60Hz ~ 253Hz) for CTCSS tone detection
•Zero-crossing for detected CTCSS tone frequency output
•CTCSS Tx modulation summing Amp
LCD
•Common driver pins : 4
•Segment driver pins : 32
•1/3 bias
•1/4 duty, 1/2 duty
•16 Level LCD contrast control by software
PACKAGE
•100-pin QFP (EM78P568Q)
78-pin die (EM78P568H)
III. Application
FRS (Family Radio Systems) ,other wireless and portable products,
EM78P568
8-bit OTP Micro-controller
__________________________________________________________________________________________________________________________________________________________________
* This specification are subject to be changed without notice.
2
01/31/2004 V4.7