Chapter 8. GMS37XXXT
CHAPTER 8. GMS37XXXT
Description
The GMS37XXXT series are remote control transmitter which uses CMOS
technology and the EPROM version.
This enables transmission code outputs of different configurations, multiple
custom code output, and double push key output for easy fabrication.
The GMS37XXXT series are suitable for remote control of TV, VCR, FANS, Air-
conditioners, Audio Equipment, Toys, Games etc.
It is possible to structure the 8 x 7 key matrix for GMS37112T, and the 4 x 7 key
matrix for GMS37004T.
Features
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Program memory
: 1,024 bytes for GMS37004T/112T/140T
Data memory : 32 4 bits
43 types of instruction set
3 levels of subroutine nesting
Operating frequency : 300kHz ~ 1MHz at kHz version
2.4MHz ~ 4MHz at MHz version
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Instruction cycle :
fOSC/6 at kHz version
fOSC/48 at MHz version
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CMOS process (Single 3.0V power supply)
Stop mode (Through internal instruction)
Released stop mode by key input
Built in Power-on Reset circuit
Built in Low Voltage Detection circuit
Built in capacitor for ceramic oscillation circuit at kHz version
Built in a watch dog timer (WDT)
Low operating voltage : 2.2 ~ 3.6V (at 300kHz ~ 4MHz)
Table 8-1 GMS37XXXT series members
Series
Program memory
Data memory
I/O ports
GMS37004T
GMS37112T
GMS37140T
1,024
1,024
1,024
32
4
32
4
32
4
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4
4
4
4
Input ports
4
Output ports
Package
7 (D0~D6)
7 (D0~D6)
10 (D0~D9)
16DIP/SOP
20DIP/SOP/SSOP
24Skinny DIP/SOP
8-1
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