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GMS34004TW单片机特征基本介绍：
Program memory : 512bytes for GMS34004T
1,024 bytes for GMS34112T/140T
Data memory : 32 4 bits
43 types of instruction set
3 levels of subroutine nesting
1 bit output port for a large current (REMOUT signal)
Operating frequency :300KHz~500KHz at KHz version
2.4MHz~4MHz at MHz version
300KHz~4.2MHz at WIDE version
Instruction cycle : fOSC/6 at KHz and WIDE version fOSC/48 at MHz version
CMOS process (3.0V or 5.0V power supply)
Stop mode (Through internal instruction)
Released stop mode by key input
Built in capacitor for ceramic oscillation circuit at KHz version
Built in a watch dog timer (WDT)
Low operating voltage : 2.2~4.5V (at KHz and MHz version)
Normal operating voltage: 4.0~5.0V (at WIDE version)
