Chapter 2. GMS37XXX
2. GMS37XXX
Description
The GMS37XXX series are remote control transmitter which uses CMOS technology.
This enables transmission code outputs of different configurations, multiple custom code
output, and double push key output for easy fabrication.
The GMS37XXX 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 GMS37112, and the 4 x 7 key matrix
for GMS37004.
Features
Program memory : 1,024 bytes for GMS37004/112/140
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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 (Masked option)
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: 2.0 ~ 3.6V (at 300kHz ~ 4MHz)
Table 2-1 GMS37XXX series members
Series
Program memory
Data memory
I/O ports
GMS37004
GMS37112
GMS37140
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
2-1
HYNIX [ HYNIX SEMICONDUCTOR ]
