Introduction
OUTLINE OF CHARACTERISTICS
The GMS340 series are remote control transmitter which uses CMOS technology, and the EPROM version of GMS34XXX series. This enables transmission code outputs of different configurations, multiple custom code output, and double push key output for easy fabrication.
The GMS340 series are suitable for remote control of TV, VCR, FANS, Air conditioners, Audio Equipments, Toys, Games etc.

Characteristics
· 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)